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Elias James Corey

Elias James Corey (born July 12, 1928) is an American organic chemist. In 1990, he won the Nobel Prize in Chemistry "for his development of the theory and methodology of organic synthesis",[3] specifically retrosynthetic analysis.[4][5]

E.J. Corey
Corey in 2007
Born
Elias James Corey

(1928-07-12) July 12, 1928 (age 95)
Alma materMassachusetts Institute of Technology
Known forRetrosynthetic analysis
Synthon
Corey–Bakshi–Shibata catalyst
Corey–Chaykovsky reaction
Corey–Fuchs reaction
Corey–Gilman–Ganem oxidation
Corey–House synthesis
Corey–Itsuno reduction
Corey–Kim oxidation
Corey–Link reaction
Corey–Nicolaou macrolactonization
Corey–Peterson olefination
Corey–Seebach reaction
Corey–Suggs reagent
Corey–Winter olefin synthesis
Awards
Scientific career
FieldsOrganic chemistry
InstitutionsUniversity of Illinois at Urbana–Champaign
Harvard University
ThesisThe synthesis of N,N-diacylamino acids and analogs of penicillin (1951)
Doctoral advisorJohn C. Sheehan
Notable students
Websitechemistry.harvard.edu/people/e-j-corey

Regarded by many as one of the greatest living chemists, he has developed numerous synthetic reagents, methodologies and total syntheses and has advanced the science of organic synthesis considerably.

Biography edit

E.J. Corey (the surname was anglicized from Levantine Arabic Khoury, meaning priest) was born to Lebanese Greek Orthodox Christian immigrants Fatima (née Hasham) and Elias Corey in Methuen, Massachusetts, 50 km (31 mi) north of Boston.[6] His mother changed his name from William to "Elias" to honor his father, who died eighteen months after Corey's birth. His widowed mother, brother, two sisters, aunt and uncle all lived together in a spacious house, struggling through the Great Depression. As a young boy, Corey was independent and enjoyed sports such as baseball, football, and hiking. He attended a Catholic elementary school and Lawrence High School in Lawrence, Massachusetts.

At the age of 16 Corey entered MIT, where he earned both a bachelor's degree in 1948 and a Ph.D. under Professor John C. Sheehan in 1951. Upon entering MIT, Corey's only experience with science was in mathematics, and he began his college career pursuing a degree in engineering. After his first chemistry class in his sophomore year he began rethinking his long-term career plans and graduated with a bachelor's degree in chemistry. Immediately thereafter, at the invitation of Professor John C. Sheehan, Corey remained at MIT for his Ph.D. After his graduate career he was offered an appointment at the University of Illinois at Urbana–Champaign, where he became a full professor of chemistry in 1956 at the age of 27. He was initiated as a member of the Zeta chapter of Alpha Chi Sigma at the University of Illinois in 1952.[7] In 1959, he moved to Harvard University, where he is currently an emeritus professor of organic chemistry with an active Corey Group research program. He chose to work in organic chemistry because of "its intrinsic beauty and its great relevance to human health".[8] He has also been an advisor to Pfizer for more than 50 years.[9]

Among numerous honors, Corey was awarded the National Medal of Science in 1988,[10] the Nobel Prize in Chemistry in 1990,[5] and the American Chemical Society's greatest honor, the Priestley Medal, in 2004.[11]

Major contributions edit

Reagents edit

Corey has developed several new synthetic reagents:

  • PCC (pyridinium chlorochromate), also referred to as the Corey-Suggs reagent, is widely used for the oxidation of alcohols to corresponding ketones and aldehydes.[12] PCC has several advantages over other commercial oxidants. An air-stable yellow solid, it is only slightly hygroscopic. Unlike other oxidizing agents, PCC requires only about 1.5 equivalents to complete a single oxidation (scheme 1).
     

    In the reaction, the alcohol nucleophilically displaces chlorine from the electropositive chromium(VI) metal. The chloride anion then acts as a base to afford the aldehyde product and chromium(IV).

    The slightly acidic character of PCC makes it useful for cyclization reactions with alcohols and alkenes (Scheme 2).[13]

     
    reactivity of PCC under acidic conditions

    The initial oxidation yields the corresponding aldehyde, which can then undergo a Prins reaction with the neighboring alkene. After elimination and further oxidation, the product is a cyclic ketone. Conversely, powdered sodium acetate co-reagent inhibits reaction after formation of the aldehyde.

    PCC's oxidatory robustness has also rendered it useful in the realm of total synthesis (Scheme 3). This example illustrates that PCC is capable of performing a Dauben oxidative rearrangement with tertiary alcohols through a [3,3]-sigmatropic rearrangement.[14]

     
    [3,3] rearrangement with PCC
  • t-Butyldimethylsilyl ether (TBS),[15] triisopropylsilyl ether (TIPS), and methoxyethoxymethyl (MEM) are popular alcohol protecting groups. The development of these protecting groups allowed the synthesis of several natural products whose functional groups could not withstand standard chemical transformations. Although the synthetic community attempts to minimize the use of protecting groups, it is still rare that a published natural-product synthesis omits them entirely. Since 1972 the TBS group has become the most popular silicon protecting group (Scheme 4).[16][17] TBS is stable to chromatography and labile enough to cleave under basic and acidic conditions. More importantly, TBS ethers are stable to such carbon nucleophiles as Grignard reagents and enolates.[18][19][20]
     

    CSA (Camphorsulfonic acid) selectively removes a primary TBS ether in the presence of TIPS and tertiary TBS ethers. Other TBS deprotection methods include acids (also Lewis acids), and fluorides.

    TIPS protecting groups provide increased selectivity of primary over secondary and tertiary alcohol protection. Their ethers are more stable under acidic and basic conditions than TBS ethers, but less labile for deprotection.[21] The most common cleavage reagents employ the same conditions as TBS ether, but longer reaction times.

     

    Usually TBAF severs TBS ethers, but the hindered TBS ether above survives primary TIPS removal (scheme 5).[22]

    The MEM protecting group was first described by Corey in 1976.[23] This protecting group is similar in reactivity and stability to other alkoxy methyl ethers under acidic conditions. Acidic conditions usually accomplish cleavage of MEM protecting groups, but coordination with metal halides greatly enhances lability (scheme 6).[24]

     
  • 1,3-Dithianes are a temporary modification of a carbonyl group that reverses their reactivity in displacement and addition reactions. Dithianation introduced umpolung chemistry, now a key concept in organic synthesis.[25] The formations of dithianes can be accomplished with a Lewis acid (scheme 7) or directly from carbonyl compounds.[26]
     

    The pKa of dithianes is approximately 30, allowing deprotonation with an alkyl lithium reagent, typically n-butyllithium.

    The reaction between dithianes and aldehydes is now known as the Corey-Seebach reaction. The dithiane, once deprotonated, serves as an acyl anion, attacking incoming electrophiles. Dithiane deprotection, usually with HgO, constructs a ketone product.[25]

     
  • Corey also commenced detailed studies on cationic polyolefin cyclizations utilized in enzymatic production of cholesterol from simpler plant terpenes.[27] Corey established the details of the remarkable cyclization process by first studying the biological synthesis of sterols from squalene.

Methodology edit

Several reactions developed in Corey's lab have become commonplace in modern synthetic organic chemistry. At least 302 methods have been developed in the Corey group since 1950.[28] Several reactions have been named after him:

  • Corey-Itsuno reduction, also known as the Corey-Bakshi-Shibata reduction, is an enantioselective reduction of ketones to alcohols through an oxazaborolidine catalyst, with various boranes as the stoichiometric reductant.[29] The Corey group first demonstrated the catalyst's synthesis using borane and the chiral amino acid proline (scheme 9).[30][31]
     

    Later, Corey demonstrated that substituted boranes were easier to prepare and much more stable.

    The reduction mechanism begins with the oxazoborolidine, only slightly basic at nitrogen, coordinating to a borane reductant (scheme 10).[31] Poor donation from the nitrogen to the boron leaves the Lewis acidity mostly intact, allowing coordination to the ketone substrate. The complexation of the substrate occurs from the most accessible lone pair of the oxygen, restricting rotation around the B-O bond due to the sterically neighboring phenyl group.[32]

     

    Migration of the hydride from borane to the electrophilic ketone center occurs via a 6-membered ring transition state, leading to a four-membered ring intermediate, ultimately providing the chiral product and regeneration of the catalyst.[33]

    The reaction has also been of great use to natural products chemists (scheme 11).[33][34] The synthesis of dysidiolide by Corey and co-workers was achieved via an enantioselective CBS reduction using a borane-dimethylsulfide complex.

     
  • Corey-Fuchs alkyne synthesis is the synthesis of terminal alkynes through a one-carbon homologation of aldehydes using triphenylphosphine and carbon tetrabromide.[30][35] The mechanism is similar to that of a combined Wittig reaction and Appell reaction. Reacting a phosphorus ylide formed in situ with the aldehyde substrate yields a dibromoolefin.[36]
     

    On treatment with two equivalents of n-butyllithium, lithium halogen exchange and deprotonation yields a lithium acetylide species that undergoes hydrolysis to yield the terminal alkyne product (scheme 12).[30]

    More recent developments include a modified procedure for one-pot synthesis.[37]

    This synthetic transformation has been proven successful in the total synthesis (+)-taylorione by W.J. Kerr and co-workers (scheme 13).[38]

     
  • The Corey–Kim oxidation was a new conversion of alcohols into corresponding aldehydes and ketones.[30][39][40] This combination of N-chlorosuccinimidosulfonium chloride (NCS), dimethylsulfide (DMS), and triethylamine (TEA) offers a less toxic alternative to chromium-based oxidations. The Corey-Kim reagent is formed in situ when the succinimide and sulfide react to form a dimethylsuccinimidosulfonium chloride species (scheme 14).[30]
     

    Triethylamine deprotonates the alkoxysulfonium salt at the α position to afford the oxidized product. The reaction accommodates a wide array of functional groups, but allylic and benzylic alcohols are typically transformed into chlorides instead.[39]

    Its application in synthesis is based on the mild protocol conditions and functional and protecting group compatibility. In the total synthesis of ingenol, Kuwajima and co-workers exploited the Corey-Kim oxidation by selectively oxidizing the less hindered secondary alcohol(scheme 15).[41]

     
  • Corey-Winter olefination is a stereospecific transformation of 1,2-diols to alkenes involving the diol substrate, thiocarbonyldiimidazole, and excess trialkylphosphite.[30][42] The exact mechanism is unknown, but has been narrowed down to two possible pathways.[43] The thionocarbonate and trialkylphosphite either form a phosphorus ylide or carbenoid intermediate. The reaction is stereospecific for most substrates unless the product would lead to an exceedingly strained structure, as discovered when Corey et al attempted to form sterically hindered trans alkenes in certain 7-membered rings. Stereospecfic alkenes are present in several natural products as the method continues to be exploited to yield a series of complex substrates. Professor T.K.M Shing et al used the Corey-Winter olefination reaction to synthesize (+)-Boesenoxide (scheme 16).[44]
     
    total synthesis example of corey winter olefination
  • CBS-type enantioselective Diels–Alder reaction has been developed using a similar scaffold to the enantioselective CBS reduction.[31] After the development of this reaction the CBS reagent proved to be a very versatile reagent for a series of several powerful synthetic transformations. The use of a chiral Lewis acid such as the CBS catalyst includes a broad range of unsaturated enones substrates. The reaction likely proceeds via a highly organized 6-membered ring pre-transition state to deliver highly enantio-enriched products (scheme 17).[45]
     
    enantioslective diels-alder transition state

    This transition state likely occurs because of favorable pi-stacking with the phenyl substituent.[31][46] The enantioselectivity of the process is facilitated from the diene approaching the dienophile from the opposite face of the phenyl substituent.

    The Diels-Alder reaction is one of the most powerful transformations in synthetic chemistry. The synthesis of natural products using the Diels-Alder reaction as a transform has been applied especially to the formation of six-membered rings(scheme 18).[47]

     
    enantioslective diels-alder in total synthesis
  • Corey-Nicolaou macrolactonization provides the first method for preparing medium-to-large-size lactones.[30][48] Previously, intermolecular outcompeted intramolecular lactonization even at low concentrations. One big advantage of this reaction is that it is performed under neutral conditions allowing the presence of acid and base-labile functional groups. As of 2016, rings of 7–44 members have been successfully synthesized using this method.[49][50]
     
    mechanism of Corey-Nicolaou macrolactonization

    The reaction occurs in the presence of 2,2'-dipyridyl disulfide and triphenylphosphine with reflux of a nonpolar solvent such as benzene. The mechanism begins with formation of the 2-pyridinethiol ester (scheme 19). Proton-transfer provides a dipolar intermediate in which the alkoxide nucleophile attacks the electrophilic carbonyl center, providing a tetrahedral intermediate that yields the macrolactone product.[51]

    One of the first examples of this protocol was applied to the total synthesis of zearalenone (scheme 20).[51]

     
    macrolactonization total synthesis example
  • The Johnson-Corey-Chaykovsky reaction synthesizes epoxides and cyclopropanes.[30] The reaction forms a sulfur ylide in situ that reacts with enones, ketones, aldehydes, and imines to form corresponding epoxides, cyclopropanes, and aziridines.[52] Two sulfur ylide variants have been employed that give different chemeoselective products (scheme 21).The dimethylsulfoxonium methylide provides epoxides from ketones, but yields the cyclopropanes when enones are employed. Dimethylsulfonium methylide transforms ketones and enones to the corresponding epoxides. Dimethylsulfonium methylide is much more reactive and less stable than dimethylsulfoxonium methylide, so it is generated at low temperatures.[53]
     
    corey-chaykovsky selectivity
  • Based on their reactivity, another distinct advantage of these two variants is that kinetically they provide a difference in diastereoselectivity. The reaction is very well established, and enantioselective variants (catalytic and stoichiometric) have also been achieved. From a retrosynthetic analysis standpoint, this reaction provides a reasonable alternative to conventional epoxidation reactions with alkenes (scheme 22). Danishefsky utilized this methodology for the synthesis of taxol. Diastereoselectivity is established by 1,3 interactions in the transition state required for epoxide closure.[54]
     
    corey-chaykovsky total synthesis example

Total syntheses edit

E. J. Corey and his research group have completed many total syntheses. At least 265 compounds have been synthesized in the Corey group since 1950.[55]

His 1969 total syntheses of several prostaglandins are considered classics.[56][57][58][59] Specifically the synthesis of Prostaglandin F presents several challenges. The presence of both cis and trans olefins as well as five asymmetric carbon atoms renders the molecule a desirable challenge for organic chemists. Corey's retrosynthetic analysis outlines a few key disconnections that lead to simplified precursors (scheme 23).

 

Molecular simplification began first by disconnecting both carbon chains with a Wittig reaction and Horner-Wadsworth Emmons modification. The Wittig reaction affords the cis product, while the Horner-Wadsworth Emmons produces the trans olefin. The published synthesis reveals a 1:1 diastereomeric mixture of the carbonyl reduction using zinc borohydride. However, years later Corey and co-workers established the CBS reduction. One of the examples that exemplified this protocol was an intermediate in the prostaglandin synthesis revealing a 9:1 mixture of the desired diastereomer (scheme 24).[33]

 

The iodolactonization transform affords an allylic alcohol leading to a key Baeyer-Villiger intermediate. This oxidation regioselectively inserts an oxygen atom between the ketone and the most electron-rich site. The pivotal intermediate leads to a straightforward conversion to the Diels-Alder structural goal, which provides the carbon framework for the functionalized cyclopentane ring. Later Corey developed an asymmetric Diels-Alder reaction employing a chiral oxazoborolidine, greatly simplifying the synthetic route to the prostaglandins.

Other notable syntheses:

Publications edit

E.J. Corey has more than 1100 publications.[69] In 2002, the American Chemical Society (ACS) recognized him as the "Most Cited Author in Chemistry". In 2007, he received the first ACS Publications Division "Cycle of Excellence High Impact Contributor Award"[70] and was ranked the number one chemist in terms of research impact by the Hirsch Index (h-index).[71] His books include:

  • Corey, E. J. (2010). Enantioselective chemical synthesis : methods, logic and practice. Dallas, Texas: Direct Book Publishing. ISBN 978-0-615-39515-9. OCLC 868975499.
  • Corey, E. J. (1995). The logic of chemical synthesis. New York: John Wiley. ISBN 0-471-11594-0. OCLC 45734016.
  • Corey, E. J. (2007). Molecules and medicine. Hoboken, N.J: John Wiley & Sons. ISBN 978-0-470-26096-8. OCLC 156819246.
  • Li, Jie (2011). Name Reactions in Heterocyclic Chemistry II. Hoboken, N.J: Wiley. ISBN 978-0-470-08508-0. OCLC 761319808.
  • Li, Jie (2007). Name reactions for functional group transformations. Hoboken, N.J: Wiley-Interscience. ISBN 978-0-471-74868-7. OCLC 85851580.

Altom suicide edit

Jason Altom, one of Corey's students, committed suicide in 1998.[72] Altom's suicide caused controversy because he explicitly blamed Corey, his research advisor, for his suicide.[73] Altom cited in his 1998 farewell note "abusive research supervisors" as one reason for taking his life. Altom's suicide note also contained explicit instructions on how to reform the relationship between students and their supervisors.

Altom was the third member of Corey's lab to commit suicide since 1980.[74] Corey was reportedly devastated and bewildered by his student's death.[75] Corey said, "That letter doesn't make sense. At the end, Jason must have been delusional or irrational in the extreme." Corey also claimed he never questioned Altom's intellectual contributions. "I did my best to guide Jason as a mountain guide would to guide someone climbing a mountain. I did my best every step of the way," Corey states. "My conscience is clear. Everything Jason did came out of our partnership. We never had the slightest disagreement."[72] The American Foundation for Suicide Prevention (AFSP) cited The New York Times article on Altom's suicide as an example of problematic reporting, arguing that Altom presented warning signs of depression and suicidal ideation and that the article had scapegoated Corey despite a lack of secondary evidence that the advisor's behavior had contributed to Altom's distress.[76][77] According to The Boston Globe, students and professors said Altom actually retained Corey's support.[75]


Corey Group members edit

As of 2010, approximately 700 people have been Corey Group members including notable students Eric Block, Dale L. Boger, Rajender Reddy Leleti, Weston T. Borden, David E. Cane, Rick L. Danheiser, William L. Jorgensen, John Katzenellenbogen, Alan P. Kozikowski, Bruce H. Lipshutz, David R. Liu, Albert Meyers, K. C. Nicolaou, Ryōji Noyori, Gary H. Posner, Bengt I. Samuelsson, Dieter Seebach, Vinod K. Singh, Brian Stoltz, Alice Ting, Hisashi Yamamoto, Phil Baran and Jin-Quan Yu. A database of 580 former members and their current affiliation was developed for Corey's 80th birthday in July 2008.[78]

Woodward–Hoffmann rules edit

When awarded the Priestley Medal in 2004, E. J. Corey created a controversy with his claim to have inspired Robert Burns Woodward prior to the development of the Woodward–Hoffmann rules. Corey wrote:

"On May 4, 1964, I suggested to my colleague R. B. Woodward a simple explanation involving the symmetry of the perturbed (HOMO) molecular orbitals for the stereoselective cyclobutene → 1,3-butadiene and 1,3,5-hexatriene → cyclohexadiene conversions that provided the basis for the further development of these ideas into what became known as the Woodward–Hoffmann rules."[79]

This was Corey's first public statement on his claim that starting on May 5, 1964, Woodward put forth Corey's explanation as his own thought with no mention of Corey and the conversation of May 4. Corey had discussed his claim privately with Hoffmann and close colleagues since 1964. Corey mentions that he made the Priestley statement "so the historical record would be correct".[80]

Corey's claim and contribution were publicly rebutted by Roald Hoffmann in the journal Angewandte Chemie. In the rebuttal, Hoffmann states that he asked Corey over the course of their long discussion of the matter why Corey did not make the issue public. Corey responded that he thought such a public disagreement would hurt Harvard and that he would not "consider doing anything against Harvard, to which I was and am so devoted." Corey also hoped that Woodward himself would correct the historical record "as he grew older, more considerate, and more sensitive to his own conscience."[81] Woodward died suddenly of a heart attack in his sleep in 1979.

Awards and honors edit

E.J. Corey has received more than 40 major awards including the Linus Pauling Award (1973), Franklin Medal (1978), Tetrahedron Prize (1983), Wolf Prize in Chemistry (1986), National Medal of Science (1988), Japan Prize (1989), Nobel Prize in Chemistry (1990), Golden Plate Award of the American Academy of Achievement (1991),[82] Roger Adams Award (1993), and the Priestley Medal (2004).[11] He was inducted into the Alpha Chi Sigma Hall of Fame in 1998.[7] As of 2008, he has been awarded 19 honorary degrees from universities around the world including Oxford University (UK), Cambridge University (UK), and National Chung Cheng University.[83] In 2013, the E.J. Corey Institute of Biomedical Research (CIBR) opened in Jiangyin, Jiangsu Province, China.[84]

Corey was elected a Foreign Member of the Royal Society (ForMemRS) in 1998.[2]

References edit

  1. ^ Laureates of the Japan Prize April 7, 2016, at the Wayback Machine. japanprize.jp
  2. ^ a b . London: Royal Society. Archived from the original on October 18, 2015.
  3. ^ "The Nobel Prize in Chemistry 1990". Nobelprize.org. Retrieved July 25, 2015.
  4. ^ E. J. Corey, X-M. Cheng, The Logic of Chemical Synthesis, Wiley, New York, 1995, ISBN 0-471-11594-0.
  5. ^ a b Corey, E.J. (1991). "The Logic of Chemical Synthesis: Multistep Synthesis of Complex Carbogenic Molecules (Nobel Lecture)". Angew. Chem. Int. Ed. Engl. 30 (5): 455–465. doi:10.1002/anie.199104553.
  6. ^ Elias James Corey – Autobiography July 6, 2008, at the Wayback Machine. nobelprize.org
  7. ^ a b Fraternity – Awards – Hall of Fame – Alpha Chi Sigma January 26, 2016, at the Wayback Machine
  8. ^ Corey, E.J. (1990). "Nobel Prize Autobiography". Nobelprize.org: The Official Site of the Nobel Prize. Retrieved September 9, 2010.
  9. ^ "Compiled Works of Elias J. Corey, Notes, Pfizer, Celebrating your 80th birthday". June 27, 2008. Retrieved November 15, 2013.
  10. ^ National Science Foundation – The President's National Medal of Science October 15, 2012, at the Wayback Machine
  11. ^ a b See the E.J. Corey, About E.J. Corey, Major Awards tab "Compiled Works of Elias J. Corey". July 12, 2008. Retrieved November 15, 2013.
  12. ^ Corey, E.J.; Suggs, W. (1975). "Pyridinium chlorochromate. An efficient reagent for oxidation of primary and secondary alcohols to carbonyl compounds". Tetrahedron Lett. 16 (31): 2647–2650. doi:10.1016/s0040-4039(00)75204-x.
  13. ^ Corey, E. J.; Boger, D. (1978). "Oxidative cationic cyclization reactions effected by pyridinium chlorochromate". Tetrahedron Lett. 19 (28): 2461–2464. doi:10.1016/s0040-4039(01)94800-2.
  14. ^ Yang; et al. (2010). "Asymmetric Total Synthesis of Caribenol A". Journal of the American Chemical Society. 132 (39): 13608–13609. doi:10.1021/ja106585n. PMID 20831198.
  15. ^ Corey, E. J.; Venkateswarlu, A. (1972). "Protection of hydroxyl groups as tert-butyldimethylsilyl derivatives". J. Am. Chem. Soc. 94 (17): 6190–6191. doi:10.1021/ja00772a043.
  16. ^ Mori; et al. (1998). "Formal Total Synthesis of Hemibrevetoxin B by an Oxiranyl Anion Strategy". J. Org. Chem. 63 (18): 6200–6209. doi:10.1021/jo980320p. PMID 11672250.
  17. ^ Furstner; et al. (2001). "Alkyne Metathesis: Development of a Novel Molybdenum-Based Catalyst System and Its Application to the Total Synthesis of Epothilone A and C". Chem. Eur. J. 7 (24): 5299–5317. doi:10.1002/1521-3765(20011217)7:24<5299::aid-chem5299>3.0.co;2-x. PMID 11822430.
  18. ^ Kocienski, P.J. Protecting Groups; Georg Thieme Verlag: Germany, 2000
  19. ^ Friesen, R. W.; et al. (1991). "A highly stereoselective conversion of α-allenic alcohols to 1,2-syn amino alcohol derivatives via iodocarbamation". Tetrahedron Lett. 31 (30): 4249–4252. doi:10.1016/S0040-4039(00)97592-0.
  20. ^ Imanieh; et al. (1992). "A facile generation of α-silyl carbanions". Tetrahedron Lett. 33 (4): 543–546. doi:10.1016/s0040-4039(00)93991-1.
  21. ^ Ogilvie; et al. (1974). "Selective protection of hydroxyl groups in deoxynucleosides using alkylsilyl reagents". Tetrahedron Lett. 116 (33): 2865–2868. doi:10.1016/s0040-4039(01)91764-2.
  22. ^ Kadota; et al. (1998). "Stereocontrolled Total Synthesis of Hemibrevetoxin B". J. Org. Chem. 63 (19): 6597–6606. doi:10.1021/jo9807619.
  23. ^ Corey; et al. (1976). "A new general method for protection of the hydroxyl function". Tetrahedron Lett. 17 (11): 809–812. doi:10.1016/s0040-4039(00)92890-9.
  24. ^ Chiang; et al. (1989). "Total synthesis of L-659,699, a novel inhibitor of cholesterol biosynthesis". J. Org. Chem. 54 (24): 5708–5712. doi:10.1021/jo00285a017.
  25. ^ a b Corey; et al. (1982). "Total synthesis of aplasmomycin". Journal of the American Chemical Society. 104 (24): 6818–6820. doi:10.1021/ja00388a074.
  26. ^ Corey, E. J.; Seebach, D. (1965). "Synthesis of 1,n-Dicarbonyl Derivates Using Carbanions from 1,3-Dithianes". Angew. Chem. Int. Ed. 4 (12): 1077–1078. doi:10.1002/anie.196510771.
  27. ^ Wendt, K.U.; Schulz, G.E.; Liu, D.R.; Corey, E.J. (2000). "Enzyme Mechanisms for Polycyclic Triterpene Formation". Angewandte Chemie International Edition in English. 39 (16): 2812–2833. doi:10.1002/1521-3773(20000818)39:16<2812::aid-anie2812>3.3.co;2-r. PMID 11027983.
  28. ^ See the Methods tab"Compiled Works of Elias J. Corey". July 12, 2008. Retrieved November 15, 2013.
  29. ^ Corey, E. J.; et al. (1998). "Reduction of Carbonyl Compounds with Chiral Oxazaborolidine Catalysts: A New Paradigm for Enantioselective Catalysis and a Powerful New Synthetic Method". Angew. Chem. Int. Ed. 37 (15): 1986–2012. doi:10.1002/(sici)1521-3773(19980817)37:15<1986::aid-anie1986>3.0.co;2-z. PMID 29711061.
  30. ^ a b c d e f g h Kürti, L.; Czakó, B. Strategic Applications of Named Reactions in Organic Synthesis; Elsevier: Burlington, 2005.
  31. ^ a b c d Corey, E.J.; Kürti, L. Enantioselective Chemical Synthesis; Direct Book Publishing: Dallas, 2010
  32. ^ Corey, E.J.; Bakshi, R.K.; Shibata, S. (1987). "Highly enantioselective borane reduction of ketones catalyzed by chiral oxazaborolidines. Mechanism and synthetic implications". Journal of the American Chemical Society. 109 (18): 5551–5553. doi:10.1021/ja00252a056.
  33. ^ a b c Corey; et al. (1987). "A stable and easily prepared catalyst for the enantioselective reduction of ketones. Applications to multistep syntheses". Journal of the American Chemical Society. 109 (25): 7925–7926. doi:10.1021/ja00259a075.
  34. ^ Corey, E. J.; Roberts, B. E. (1997). "Total Synthesis of Dysidiolide". Journal of the American Chemical Society. 119 (51): 12425–12431. doi:10.1021/ja973023v.
  35. ^ Corey, E.J.; Fuch, P.L. Tetrahedron Lett. 1972, 3769
  36. ^ Eymery et al Synthesis 2000, 185
  37. ^ Michel; et al. (1999). "A one-pot procedure for the synthesis of alkynes and bromoalkynes from aldehydes". Tetrahedron Lett. 40 (49): 8575–8578. doi:10.1016/s0040-4039(99)01830-4.
  38. ^ Donkervoot; et al. (1996). "Development of modified Pauson-Khand reactions with ethylene and utilisation in the total synthesis of (+)-taylorione". Tetrahedron. 52 (21): 7391–7420. doi:10.1016/0040-4020(96)00259-1.
  39. ^ a b Corey, E.J.; Kim, C. U. (1972). "New and highly effective method for the oxidation of primary and secondary alcohols to carbonyl compounds". Journal of the American Chemical Society. 94 (21): 7586–7587. doi:10.1021/ja00776a056.
  40. ^ E. J. Corey; C. U. Kim (1974). "A method for the oxidation of sec,tert-1,2-diols to α-hydroxy ketones without carbon-carbon cleavage". Tetrahedron Letters. 15 (3): 287–290. doi:10.1016/S0040-4039(01)82195-X.
  41. ^ Kuwajima; et al. (2003). "Total Synthesis of Ingenol". Journal of the American Chemical Society. 125 (6): 1498–1500. doi:10.1021/ja029226n. PMID 12568608.
  42. ^ Corey, E. J.; Winter, A. E. (1963). "A New, Stereospecific Olefin Synthesis from 1,2-Diols". Journal of the American Chemical Society. 85 (17): 2677–2678. doi:10.1021/ja00900a043.
  43. ^ Block (1984). "Olefin Synthesis by Deoxygenation of Vicinal Diols". Organic Reactions. Vol. 30. p. 457. doi:10.1002/0471264180.or030.02. ISBN 978-0-471-26418-7.
  44. ^ Shing; et al. (1998). "Enantiospecific Syntheses of (+)-Crotepoxide, (+)-Boesenoxide, (+)-β-Senepoxide, (+)-Pipoxide Acetate, (−)- iso -Crotepoxide, (−)-Senepoxide, and (−)-Tingtanoxide from (−)-Quinic Acid 1". J. Org. Chem. 63 (5): 1547–1554. doi:10.1021/jo970907o.
  45. ^ Nair; et al. (2007). "Intramolecular 1,3-dipolar cycloaddition reactions in targeted syntheses". Tetrahedron. 63 (50): 12247–12275. doi:10.1016/j.tet.2007.09.065.
  46. ^ Corey, E. J.; et al. (2004). "Enantioselective and Structure-Selective Diels−Alder Reactions of Unsymmetrical Quinones Catalyzed by a Chiral Oxazaborolidinium Cation. Predictive Selection Rules". J. Am. Chem. Soc. 126 (15): 4800–4802. doi:10.1021/ja049323b. PMID 15080683.
  47. ^ Corey; et al. (1994). "Demonstration of the Synthetic Power of Oxazaborolidine-Catalyzed Enantioselective Diels-Alder Reactions by Very Efficient Routes to Cassiol and Gibberellic Acid". J. Am. Chem. Soc. 116 (8): 3611–3612. doi:10.1021/ja00087a062.
  48. ^ Corey; et al. (1975). "Synthesis of novel macrocyclic lactones in the prostaglandin and polyether antibiotic series". Journal of the American Chemical Society. 97 (3): 653–654. doi:10.1021/ja00836a036. PMID 1133366.
  49. ^ Nicolaou, K. C. (1977). "Synthesis of macrolides". Tetrahedron. 33 (7): 683–710. doi:10.1016/0040-4020(77)80180-4.
  50. ^ Shin, Inji; Hong, Suckchang; Krische, Michael J. (2016-11-02). "Total Synthesis of Swinholide A: An Exposition in Hydrogen-Mediated C–C Bond Formation". Journal of the American Chemical Society. 138 (43): 14246–14249. doi:10.1021/jacs.6b10645. ISSN 0002-7863. PMC 5096380. PMID 27779393.
  51. ^ a b Corey, E. J.; Nicolaou, K. C. (1974). "Efficient and mild lactonization method for the synthesis of macrolides". Journal of the American Chemical Society. 96 (17): 5614–5616. doi:10.1021/ja00824a073.
  52. ^ Corey, E. J.; Chaykovsky (1962). "Dimethylsulfoxonium Methylide". Journal of the American Chemical Society. 84 (5): 867–868. doi:10.1021/ja00864a040.
  53. ^ Corey, E. J.; Chaykovsky (1965). "Dimethyloxosulfonium Methylide ((CH3)2SOCH2) and Dimethylsulfonium Methylide ((CH3)2SCH2). Formation and Application to Organic Synthesis". Journal of the American Chemical Society. 87 (6): 1353–1364. doi:10.1021/ja01084a034.
  54. ^ Danishefsky; et al. (1996). "Total Synthesis of Baccatin III and Taxol". Journal of the American Chemical Society. 118 (12): 2843–2859. doi:10.1021/ja952692a.
  55. ^ See the Syntheses tab"Compiled Works of Elias J. Corey". ejcorey.org. July 12, 2008. Retrieved November 15, 2013.
  56. ^ Corey, E. J.; Weinshenker, N. M.; Schaaf, T. K.; Huber, W. (1969). "Stereo-controlled synthesis of dl-prostaglandins F2.alpha. and E2". J. Am. Chem. Soc. 91 (20): 5675–5677. doi:10.1021/ja01048a062. PMID 5808505.
  57. ^ K. C. Nicolaou, E. J. Sorensen, Classics in Total Synthesis, VCH, New York, 1996, ISBN 3-527-29231-4.
  58. ^ Corey, E. J.; Schaaf, T. K.; Huber, W.; Koelliker,V.; Weinshenker, N. M. (1970). "Total Synthesis of Prostaglandins F and E2 as the Naturally Occurring Forms". Journal of the American Chemical Society. 92 (2): 397–8. doi:10.1021/ja00705a609. PMID 5411057.
  59. ^ For a review see Axen, U.; Pike, J. E.; and Schneider, W. P. (1973) p. 81 in The Total Synthesis of Natural Products, Vol. 1, ApSimon, J. W. (ed.) Wiley, New York.
  60. ^ Corey, E. J.; Ohno, M.; Vatakencherry, P. A.; Mitra, R. B. (1961). "TOTAL SYNTHESIS OF d,l-LONGIFOLENE". J. Am. Chem. Soc. 83 (5): 1251–1253. doi:10.1021/ja01466a056.
  61. ^ Corey, E. J.; Ohno, M.; Mitra, R. B.; Vatakencherry, P. A. (1964). "Total Synthesis of Longifolene". J. Am. Chem. Soc. 86 (3): 478–485. doi:10.1021/ja01057a039.
  62. ^ Corey, E. J.; Ghosh, A. K. (1988). "Total synthesis of ginkgolide a". Tetrahedron Lett. 29 (26): 3205–3206. doi:10.1016/0040-4039(88)85122-0. PMC 6781876. PMID 31595095.
  63. ^ Corey, E. J.; Kang, M.; Desai, M. C.; Ghosh, A. K.; Houpis, I. N. (1988). "Total synthesis of (.+-.)-ginkgolide B". J. Am. Chem. Soc. 110 (2): 649–651. doi:10.1021/ja00210a083. PMC 6746322. PMID 31527923.
  64. ^ Corey, E. J. (1988). "Robert Robinson Lecture. Retrosynthetic thinking?essentials and examples". Chem. Soc. Rev. 17: 111–133. doi:10.1039/cs9881700111.
  65. ^ Corey, E. J.; Reichard, G. A. (1992). "Total Synthesis of Lactacystin". J. Am. Chem. Soc. 114 (26): 10677–10678. doi:10.1021/ja00052a096.
  66. ^ Corey, E. J.; Wu, L. I. (1993). "Enantioselective Total Synthesis of Miroestrol". J. Am. Chem. Soc. 115 (20): 9327–9328. doi:10.1021/ja00073a074.
  67. ^ Corey, E. J.; Gin, D. Y.; Kania, R. S. (1996). "Enantioselective Total Synthesis of Ecteinascidin 743". J. Am. Chem. Soc. 118 (38): 9202–9203. doi:10.1021/ja962480t.
  68. ^ Reddy Leleti, Rajender; Corey, E. J. (2004). "A Simple Stereocontrolled Synthesis of Salinosporamide A". J. Am. Chem. Soc. 126 (20): 6230–6232. CiteSeerX 10.1.1.472.2554. doi:10.1021/ja048613p. PMID 15149210.
  69. ^ See Publications in "Compiled Works of Elias J. Corey". ejcorey.org. November 15, 2013. Retrieved November 15, 2013.
  70. ^ Baum, Rudy (August 21, 2007). "E.J. Corey: Chemist Extraordinaire". C&EN Meeting Weblog, 234th ACS National Meeting &Exposition, August 19–23, 2007, Boston, Massachusetts. Retrieved September 8, 2010.
  71. ^ Van Noorden, Richard (April 23, 2007). "Hirsch index ranks top chemists". RSC: Advancing the Chemical Sciences, Chemistry World. Retrieved September 9, 2010.
  72. ^ a b Schneider, Alison (1998). "Harvard Faces the Aftermath of a Graduate Student's Suicide". The Chronicle of Higher Education. Retrieved August 21, 2010.
  73. ^ Hall, Stephen S. (November 29, 1998). "Lethal Chemistry at Harvard". The New York Times.
  74. ^ Hall, Stephen (December 29, 1998). "Lethal Chemistry at Harvard". New York Times. Retrieved September 26, 2020.
  75. ^ a b English, Bella. . Archived from the original on January 24, 2001. Retrieved November 24, 2010.{{cite web}}: CS1 maint: bot: original URL status unknown (link), The Boston Globe via Archive.org (January 2, 2001).
  76. ^ . American Foundation for Suicide Prevention (AFSP). 2010. Archived from the original on September 25, 2006. Retrieved November 4, 2012.
  77. ^ The AFSP incorrectly identifies the author and date of The New York Times article as Keith B. Richburg and November 28, 1998. The author was Stephen S. Hall and the date of publication was November 29, 1998.H, H; M.A. (2010). . American Foundation for Suicide Prevention (AFSP). Archived from the original on September 25, 2006. Retrieved August 21, 2010.
  78. ^ "Group Members: Elias James Corey". ejcorey.org. Retrieved 22 July 2021.
  79. ^ See the E. J. Corey, Impossible Dreams tabCorey, E.J. (April 30, 2004). "Impossible Dreams". Vol. 69, no. 9. JOC Perspective. pp. 2917–2919. Retrieved September 10, 2010.
  80. ^ Johnson, Carolyn Y. (March 1, 2005). . Boston Globe. Archived from the original on January 11, 2012. Retrieved September 10, 2010.
  81. ^ Hoffman, Roald (December 10, 2004). "A Claim on the Development of the Frontier Orbital Explanation Electrocyclic Reactions". Angewandte Chemie International Edition. 43 (48): 6586–6590. doi:10.1002/anie.200461440. PMID 15558636.
  82. ^ "Golden Plate Awardees of the American Academy of Achievement". www.achievement.org. American Academy of Achievement.
  83. ^ See the E.J. Corey, About E.J. Corey, Honorary Degrees tab"Compiled Works of Elias J. Corey". July 12, 2008. Retrieved November 15, 2013.
  84. ^ . E.J. Corey Institute of Biomedical Research. June 29, 2013. Archived from the original on June 20, 2015. Retrieved August 26, 2013.

External links edit

  • Compiled Works of E.J. Corey
  • Elias James Corey on Nobelprize.org  
  • Elias James Corey Nobel Lecture (PDF)
  • Podcast interview with E.J. Corey about his Lifelong Pursuit of Learning – May 30, 2018

elias, james, corey, born, july, 1928, american, organic, chemist, 1990, nobel, prize, chemistry, development, theory, methodology, organic, synthesis, specifically, retrosynthetic, analysis, coreycorey, 2007born, 1928, july, 1928, methuen, massachusetts, alma. Elias James Corey born July 12 1928 is an American organic chemist In 1990 he won the Nobel Prize in Chemistry for his development of the theory and methodology of organic synthesis 3 specifically retrosynthetic analysis 4 5 E J CoreyCorey in 2007BornElias James Corey 1928 07 12 July 12 1928 age 95 Methuen Massachusetts U S Alma materMassachusetts Institute of TechnologyKnown forRetrosynthetic analysisSynthonCorey Bakshi Shibata catalystCorey Chaykovsky reactionCorey Fuchs reactionCorey Gilman Ganem oxidationCorey House synthesisCorey Itsuno reductionCorey Kim oxidationCorey Link reactionCorey Nicolaou macrolactonizationCorey Peterson olefinationCorey Seebach reactionCorey Suggs reagentCorey Winter olefin synthesisAwardsACS Award in Pure Chemistry 1960 Ernest Guenther Award 1968 Centenary Medal 1971 Linus Pauling Award 1973 George Ledlie Prize 1973 Arthur C Cope Award 1976 William H Nichols Medal 1977 Franklin Medal 1978 Chemical Pioneer Award 1981 Lewis S Rosenstiel Award 1981 Paul Karrer Gold Medal 1982 Tetrahedron Prize 1983 Willard Gibbs Award 1984 Wolf Prize in Chemistry 1986 National Medal of Science 1988 Japan Prize 1989 1 Nobel Prize in Chemistry 1990 ForMemRS 1998 2 Priestley Medal 2004 Scientific careerFieldsOrganic chemistryInstitutionsUniversity of Illinois at Urbana ChampaignHarvard UniversityThesisThe synthesis of N N diacylamino acids and analogs of penicillin 1951 Doctoral advisorJohn C SheehanNotable studentsPhil Baran Rajender Leleti Eric Block Dale L Boger Weston T Borden David E Cane Rick L Danheiser William L Jorgensen John Katzenellenbogen Alan P Kozikowski Bruce H Lipshutz David Liu Gojko Lalic Albert Meyers K C Nicolaou Ryōji Noyori Gary H Posner Bengt I Samuelsson Dieter Seebach Vinod K Singh Brian Stoltz Hisashi Yamamoto Ramakanth Sarabu Jin Quan YuWebsitechemistry wbr harvard wbr edu wbr people wbr e j corey Regarded by many as one of the greatest living chemists he has developed numerous synthetic reagents methodologies and total syntheses and has advanced the science of organic synthesis considerably Contents 1 Biography 2 Major contributions 2 1 Reagents 2 2 Methodology 2 3 Total syntheses 2 4 Publications 3 Altom suicide 4 Corey Group members 5 Woodward Hoffmann rules 6 Awards and honors 7 References 8 External linksBiography editE J Corey the surname was anglicized from Levantine Arabic Khoury meaning priest was born to Lebanese Greek Orthodox Christian immigrants Fatima nee Hasham and Elias Corey in Methuen Massachusetts 50 km 31 mi north of Boston 6 His mother changed his name from William to Elias to honor his father who died eighteen months after Corey s birth His widowed mother brother two sisters aunt and uncle all lived together in a spacious house struggling through the Great Depression As a young boy Corey was independent and enjoyed sports such as baseball football and hiking He attended a Catholic elementary school and Lawrence High School in Lawrence Massachusetts At the age of 16 Corey entered MIT where he earned both a bachelor s degree in 1948 and a Ph D under Professor John C Sheehan in 1951 Upon entering MIT Corey s only experience with science was in mathematics and he began his college career pursuing a degree in engineering After his first chemistry class in his sophomore year he began rethinking his long term career plans and graduated with a bachelor s degree in chemistry Immediately thereafter at the invitation of Professor John C Sheehan Corey remained at MIT for his Ph D After his graduate career he was offered an appointment at the University of Illinois at Urbana Champaign where he became a full professor of chemistry in 1956 at the age of 27 He was initiated as a member of the Zeta chapter of Alpha Chi Sigma at the University of Illinois in 1952 7 In 1959 he moved to Harvard University where he is currently an emeritus professor of organic chemistry with an active Corey Group research program He chose to work in organic chemistry because of its intrinsic beauty and its great relevance to human health 8 He has also been an advisor to Pfizer for more than 50 years 9 Among numerous honors Corey was awarded the National Medal of Science in 1988 10 the Nobel Prize in Chemistry in 1990 5 and the American Chemical Society s greatest honor the Priestley Medal in 2004 11 Major contributions editReagents editCorey has developed several new synthetic reagents PCC pyridinium chlorochromate also referred to as the Corey Suggs reagent is widely used for the oxidation of alcohols to corresponding ketones and aldehydes 12 PCC has several advantages over other commercial oxidants An air stable yellow solid it is only slightly hygroscopic Unlike other oxidizing agents PCC requires only about 1 5 equivalents to complete a single oxidation scheme 1 nbsp In the reaction the alcohol nucleophilically displaces chlorine from the electropositive chromium VI metal The chloride anion then acts as a base to afford the aldehyde product and chromium IV The slightly acidic character of PCC makes it useful for cyclization reactions with alcohols and alkenes Scheme 2 13 nbsp reactivity of PCC under acidic conditions The initial oxidation yields the corresponding aldehyde which can then undergo a Prins reaction with the neighboring alkene After elimination and further oxidation the product is a cyclic ketone Conversely powdered sodium acetate co reagent inhibits reaction after formation of the aldehyde PCC s oxidatory robustness has also rendered it useful in the realm of total synthesis Scheme 3 This example illustrates that PCC is capable of performing a Dauben oxidative rearrangement with tertiary alcohols through a 3 3 sigmatropic rearrangement 14 nbsp 3 3 rearrangement with PCC t Butyldimethylsilyl ether TBS 15 triisopropylsilyl ether TIPS and methoxyethoxymethyl MEM are popular alcohol protecting groups The development of these protecting groups allowed the synthesis of several natural products whose functional groups could not withstand standard chemical transformations Although the synthetic community attempts to minimize the use of protecting groups it is still rare that a published natural product synthesis omits them entirely Since 1972 the TBS group has become the most popular silicon protecting group Scheme 4 16 17 TBS is stable to chromatography and labile enough to cleave under basic and acidic conditions More importantly TBS ethers are stable to such carbon nucleophiles as Grignard reagents and enolates 18 19 20 nbsp CSA Camphorsulfonic acid selectively removes a primary TBS ether in the presence of TIPS and tertiary TBS ethers Other TBS deprotection methods include acids also Lewis acids and fluorides TIPS protecting groups provide increased selectivity of primary over secondary and tertiary alcohol protection Their ethers are more stable under acidic and basic conditions than TBS ethers but less labile for deprotection 21 The most common cleavage reagents employ the same conditions as TBS ether but longer reaction times nbsp Usually TBAF severs TBS ethers but the hindered TBS ether above survives primary TIPS removal scheme 5 22 The MEM protecting group was first described by Corey in 1976 23 This protecting group is similar in reactivity and stability to other alkoxy methyl ethers under acidic conditions Acidic conditions usually accomplish cleavage of MEM protecting groups but coordination with metal halides greatly enhances lability scheme 6 24 nbsp 1 3 Dithianes are a temporary modification of a carbonyl group that reverses their reactivity in displacement and addition reactions Dithianation introduced umpolung chemistry now a key concept in organic synthesis 25 The formations of dithianes can be accomplished with a Lewis acid scheme 7 or directly from carbonyl compounds 26 nbsp The pKa of dithianes is approximately 30 allowing deprotonation with an alkyl lithium reagent typically n butyllithium The reaction between dithianes and aldehydes is now known as the Corey Seebach reaction The dithiane once deprotonated serves as an acyl anion attacking incoming electrophiles Dithiane deprotection usually with HgO constructs a ketone product 25 nbsp Corey also commenced detailed studies on cationic polyolefin cyclizations utilized in enzymatic production of cholesterol from simpler plant terpenes 27 Corey established the details of the remarkable cyclization process by first studying the biological synthesis of sterols from squalene Methodology editSeveral reactions developed in Corey s lab have become commonplace in modern synthetic organic chemistry At least 302 methods have been developed in the Corey group since 1950 28 Several reactions have been named after him Corey Itsuno reduction also known as the Corey Bakshi Shibata reduction is an enantioselective reduction of ketones to alcohols through an oxazaborolidine catalyst with various boranes as the stoichiometric reductant 29 The Corey group first demonstrated the catalyst s synthesis using borane and the chiral amino acid proline scheme 9 30 31 nbsp Later Corey demonstrated that substituted boranes were easier to prepare and much more stable The reduction mechanism begins with the oxazoborolidine only slightly basic at nitrogen coordinating to a borane reductant scheme 10 31 Poor donation from the nitrogen to the boron leaves the Lewis acidity mostly intact allowing coordination to the ketone substrate The complexation of the substrate occurs from the most accessible lone pair of the oxygen restricting rotation around the B O bond due to the sterically neighboring phenyl group 32 nbsp Migration of the hydride from borane to the electrophilic ketone center occurs via a 6 membered ring transition state leading to a four membered ring intermediate ultimately providing the chiral product and regeneration of the catalyst 33 The reaction has also been of great use to natural products chemists scheme 11 33 34 The synthesis of dysidiolide by Corey and co workers was achieved via an enantioselective CBS reduction using a borane dimethylsulfide complex nbsp Corey Fuchs alkyne synthesis is the synthesis of terminal alkynes through a one carbon homologation of aldehydes using triphenylphosphine and carbon tetrabromide 30 35 The mechanism is similar to that of a combined Wittig reaction and Appell reaction Reacting a phosphorus ylide formed in situ with the aldehyde substrate yields a dibromoolefin 36 nbsp On treatment with two equivalents of n butyllithium lithium halogen exchange and deprotonation yields a lithium acetylide species that undergoes hydrolysis to yield the terminal alkyne product scheme 12 30 More recent developments include a modified procedure for one pot synthesis 37 This synthetic transformation has been proven successful in the total synthesis taylorione by W J Kerr and co workers scheme 13 38 nbsp The Corey Kim oxidation was a new conversion of alcohols into corresponding aldehydes and ketones 30 39 40 This combination of N chlorosuccinimidosulfonium chloride NCS dimethylsulfide DMS and triethylamine TEA offers a less toxic alternative to chromium based oxidations The Corey Kim reagent is formed in situ when the succinimide and sulfide react to form a dimethylsuccinimidosulfonium chloride species scheme 14 30 nbsp Triethylamine deprotonates the alkoxysulfonium salt at the a position to afford the oxidized product The reaction accommodates a wide array of functional groups but allylic and benzylic alcohols are typically transformed into chlorides instead 39 Its application in synthesis is based on the mild protocol conditions and functional and protecting group compatibility In the total synthesis of ingenol Kuwajima and co workers exploited the Corey Kim oxidation by selectively oxidizing the less hindered secondary alcohol scheme 15 41 nbsp Corey Winter olefination is a stereospecific transformation of 1 2 diols to alkenes involving the diol substrate thiocarbonyldiimidazole and excess trialkylphosphite 30 42 The exact mechanism is unknown but has been narrowed down to two possible pathways 43 The thionocarbonate and trialkylphosphite either form a phosphorus ylide or carbenoid intermediate The reaction is stereospecific for most substrates unless the product would lead to an exceedingly strained structure as discovered when Corey et al attempted to form sterically hindered trans alkenes in certain 7 membered rings Stereospecfic alkenes are present in several natural products as the method continues to be exploited to yield a series of complex substrates Professor T K M Shing et al used the Corey Winter olefination reaction to synthesize Boesenoxide scheme 16 44 nbsp total synthesis example of corey winter olefination CBS type enantioselective Diels Alder reaction has been developed using a similar scaffold to the enantioselective CBS reduction 31 After the development of this reaction the CBS reagent proved to be a very versatile reagent for a series of several powerful synthetic transformations The use of a chiral Lewis acid such as the CBS catalyst includes a broad range of unsaturated enones substrates The reaction likely proceeds via a highly organized 6 membered ring pre transition state to deliver highly enantio enriched products scheme 17 45 nbsp enantioslective diels alder transition state This transition state likely occurs because of favorable pi stacking with the phenyl substituent 31 46 The enantioselectivity of the process is facilitated from the diene approaching the dienophile from the opposite face of the phenyl substituent The Diels Alder reaction is one of the most powerful transformations in synthetic chemistry The synthesis of natural products using the Diels Alder reaction as a transform has been applied especially to the formation of six membered rings scheme 18 47 nbsp enantioslective diels alder in total synthesis Corey Nicolaou macrolactonization provides the first method for preparing medium to large size lactones 30 48 Previously intermolecular outcompeted intramolecular lactonization even at low concentrations One big advantage of this reaction is that it is performed under neutral conditions allowing the presence of acid and base labile functional groups As of 2016 rings of 7 44 members have been successfully synthesized using this method 49 50 nbsp mechanism of Corey Nicolaou macrolactonization The reaction occurs in the presence of 2 2 dipyridyl disulfide and triphenylphosphine with reflux of a nonpolar solvent such as benzene The mechanism begins with formation of the 2 pyridinethiol ester scheme 19 Proton transfer provides a dipolar intermediate in which the alkoxide nucleophile attacks the electrophilic carbonyl center providing a tetrahedral intermediate that yields the macrolactone product 51 One of the first examples of this protocol was applied to the total synthesis of zearalenone scheme 20 51 nbsp macrolactonization total synthesis example The Johnson Corey Chaykovsky reaction synthesizes epoxides and cyclopropanes 30 The reaction forms a sulfur ylide in situ that reacts with enones ketones aldehydes and imines to form corresponding epoxides cyclopropanes and aziridines 52 Two sulfur ylide variants have been employed that give different chemeoselective products scheme 21 The dimethylsulfoxonium methylide provides epoxides from ketones but yields the cyclopropanes when enones are employed Dimethylsulfonium methylide transforms ketones and enones to the corresponding epoxides Dimethylsulfonium methylide is much more reactive and less stable than dimethylsulfoxonium methylide so it is generated at low temperatures 53 nbsp corey chaykovsky selectivity Based on their reactivity another distinct advantage of these two variants is that kinetically they provide a difference in diastereoselectivity The reaction is very well established and enantioselective variants catalytic and stoichiometric have also been achieved From a retrosynthetic analysis standpoint this reaction provides a reasonable alternative to conventional epoxidation reactions with alkenes scheme 22 Danishefsky utilized this methodology for the synthesis of taxol Diastereoselectivity is established by 1 3 interactions in the transition state required for epoxide closure 54 nbsp corey chaykovsky total synthesis example Total syntheses edit E J Corey and his research group have completed many total syntheses At least 265 compounds have been synthesized in the Corey group since 1950 55 His 1969 total syntheses of several prostaglandins are considered classics 56 57 58 59 Specifically the synthesis of Prostaglandin F2a presents several challenges The presence of both cis and trans olefins as well as five asymmetric carbon atoms renders the molecule a desirable challenge for organic chemists Corey s retrosynthetic analysis outlines a few key disconnections that lead to simplified precursors scheme 23 nbsp Molecular simplification began first by disconnecting both carbon chains with a Wittig reaction and Horner Wadsworth Emmons modification The Wittig reaction affords the cis product while the Horner Wadsworth Emmons produces the trans olefin The published synthesis reveals a 1 1 diastereomeric mixture of the carbonyl reduction using zinc borohydride However years later Corey and co workers established the CBS reduction One of the examples that exemplified this protocol was an intermediate in the prostaglandin synthesis revealing a 9 1 mixture of the desired diastereomer scheme 24 33 nbsp The iodolactonization transform affords an allylic alcohol leading to a key Baeyer Villiger intermediate This oxidation regioselectively inserts an oxygen atom between the ketone and the most electron rich site The pivotal intermediate leads to a straightforward conversion to the Diels Alder structural goal which provides the carbon framework for the functionalized cyclopentane ring Later Corey developed an asymmetric Diels Alder reaction employing a chiral oxazoborolidine greatly simplifying the synthetic route to the prostaglandins Other notable syntheses Longifolene 60 61 Ginkgolides A 62 and B 63 64 Lactacystin 65 Miroestrol 66 Ecteinascidin 743 67 Salinosporamide A 68 Publications edit E J Corey has more than 1100 publications 69 In 2002 the American Chemical Society ACS recognized him as the Most Cited Author in Chemistry In 2007 he received the first ACS Publications Division Cycle of Excellence High Impact Contributor Award 70 and was ranked the number one chemist in terms of research impact by the Hirsch Index h index 71 His books include Corey E J 2010 Enantioselective chemical synthesis methods logic and practice Dallas Texas Direct Book Publishing ISBN 978 0 615 39515 9 OCLC 868975499 Corey E J 1995 The logic of chemical synthesis New York John Wiley ISBN 0 471 11594 0 OCLC 45734016 Corey E J 2007 Molecules and medicine Hoboken N J John Wiley amp Sons ISBN 978 0 470 26096 8 OCLC 156819246 Li Jie 2011 Name Reactions in Heterocyclic Chemistry II Hoboken N J Wiley ISBN 978 0 470 08508 0 OCLC 761319808 Li Jie 2007 Name reactions for functional group transformations Hoboken N J Wiley Interscience ISBN 978 0 471 74868 7 OCLC 85851580 Altom suicide editMain article Jason Altom Jason Altom one of Corey s students committed suicide in 1998 72 Altom s suicide caused controversy because he explicitly blamed Corey his research advisor for his suicide 73 Altom cited in his 1998 farewell note abusive research supervisors as one reason for taking his life Altom s suicide note also contained explicit instructions on how to reform the relationship between students and their supervisors Altom was the third member of Corey s lab to commit suicide since 1980 74 Corey was reportedly devastated and bewildered by his student s death 75 Corey said That letter doesn t make sense At the end Jason must have been delusional or irrational in the extreme Corey also claimed he never questioned Altom s intellectual contributions I did my best to guide Jason as a mountain guide would to guide someone climbing a mountain I did my best every step of the way Corey states My conscience is clear Everything Jason did came out of our partnership We never had the slightest disagreement 72 The American Foundation for Suicide Prevention AFSP cited The New York Times article on Altom s suicide as an example of problematic reporting arguing that Altom presented warning signs of depression and suicidal ideation and that the article had scapegoated Corey despite a lack of secondary evidence that the advisor s behavior had contributed to Altom s distress 76 77 According to The Boston Globe students and professors said Altom actually retained Corey s support 75 Corey Group members editAs of 2010 approximately 700 people have been Corey Group members including notable students Eric Block Dale L Boger Rajender Reddy Leleti Weston T Borden David E Cane Rick L Danheiser William L Jorgensen John Katzenellenbogen Alan P Kozikowski Bruce H Lipshutz David R Liu Albert Meyers K C Nicolaou Ryōji Noyori Gary H Posner Bengt I Samuelsson Dieter Seebach Vinod K Singh Brian Stoltz Alice Ting Hisashi Yamamoto Phil Baran and Jin Quan Yu A database of 580 former members and their current affiliation was developed for Corey s 80th birthday in July 2008 78 Woodward Hoffmann rules editWhen awarded the Priestley Medal in 2004 E J Corey created a controversy with his claim to have inspired Robert Burns Woodward prior to the development of the Woodward Hoffmann rules Corey wrote On May 4 1964 I suggested to my colleague R B Woodward a simple explanation involving the symmetry of the perturbed HOMO molecular orbitals for the stereoselective cyclobutene 1 3 butadiene and 1 3 5 hexatriene cyclohexadiene conversions that provided the basis for the further development of these ideas into what became known as the Woodward Hoffmann rules 79 This was Corey s first public statement on his claim that starting on May 5 1964 Woodward put forth Corey s explanation as his own thought with no mention of Corey and the conversation of May 4 Corey had discussed his claim privately with Hoffmann and close colleagues since 1964 Corey mentions that he made the Priestley statement so the historical record would be correct 80 Corey s claim and contribution were publicly rebutted by Roald Hoffmann in the journal Angewandte Chemie In the rebuttal Hoffmann states that he asked Corey over the course of their long discussion of the matter why Corey did not make the issue public Corey responded that he thought such a public disagreement would hurt Harvard and that he would not consider doing anything against Harvard to which I was and am so devoted Corey also hoped that Woodward himself would correct the historical record as he grew older more considerate and more sensitive to his own conscience 81 Woodward died suddenly of a heart attack in his sleep in 1979 Awards and honors editE J Corey has received more than 40 major awards including the Linus Pauling Award 1973 Franklin Medal 1978 Tetrahedron Prize 1983 Wolf Prize in Chemistry 1986 National Medal of Science 1988 Japan Prize 1989 Nobel Prize in Chemistry 1990 Golden Plate Award of the American Academy of Achievement 1991 82 Roger Adams Award 1993 and the Priestley Medal 2004 11 He was inducted into the Alpha Chi Sigma Hall of Fame in 1998 7 As of 2008 he has been awarded 19 honorary degrees from universities around the world including Oxford University UK Cambridge University UK and National Chung Cheng University 83 In 2013 the E J Corey Institute of Biomedical Research CIBR opened in Jiangyin Jiangsu Province China 84 Corey was elected a Foreign Member of the Royal Society ForMemRS in 1998 2 References edit Laureates of the Japan Prize Archived April 7 2016 at the Wayback Machine japanprize jp a b Professor Elias Corey ForMemRS Foreign Member London Royal Society Archived from the original on October 18 2015 The Nobel Prize in Chemistry 1990 Nobelprize org Retrieved July 25 2015 E J Corey X M Cheng The Logic of Chemical Synthesis Wiley New York 1995 ISBN 0 471 11594 0 a b Corey E J 1991 The Logic of Chemical Synthesis Multistep Synthesis of Complex Carbogenic Molecules Nobel Lecture Angew Chem Int Ed Engl 30 5 455 465 doi 10 1002 anie 199104553 Elias James Corey Autobiography Archived July 6 2008 at the Wayback Machine nobelprize org a b Fraternity Awards Hall of Fame Alpha Chi Sigma Archived January 26 2016 at the Wayback Machine Corey E J 1990 Nobel Prize Autobiography Nobelprize org The Official Site of the Nobel Prize Retrieved September 9 2010 Compiled Works of Elias J Corey Notes Pfizer Celebrating your 80th birthday June 27 2008 Retrieved November 15 2013 National Science Foundation The President s National Medal of Science Archived October 15 2012 at the Wayback Machine a b See the E J Corey About E J Corey Major Awards tab Compiled Works of Elias J Corey July 12 2008 Retrieved November 15 2013 Corey E J Suggs W 1975 Pyridinium chlorochromate An efficient reagent for oxidation of primary and secondary alcohols to carbonyl compounds Tetrahedron Lett 16 31 2647 2650 doi 10 1016 s0040 4039 00 75204 x Corey E J Boger D 1978 Oxidative cationic cyclization reactions effected by pyridinium chlorochromate Tetrahedron Lett 19 28 2461 2464 doi 10 1016 s0040 4039 01 94800 2 Yang et al 2010 Asymmetric Total Synthesis of Caribenol A Journal of the American Chemical Society 132 39 13608 13609 doi 10 1021 ja106585n PMID 20831198 Corey E J Venkateswarlu A 1972 Protection of hydroxyl groups as tert butyldimethylsilyl derivatives J Am Chem Soc 94 17 6190 6191 doi 10 1021 ja00772a043 Mori et al 1998 Formal Total Synthesis of Hemibrevetoxin B by an Oxiranyl Anion Strategy J Org Chem 63 18 6200 6209 doi 10 1021 jo980320p PMID 11672250 Furstner et al 2001 Alkyne Metathesis Development of a Novel Molybdenum Based Catalyst System and Its Application to the Total Synthesis of Epothilone A and C Chem Eur J 7 24 5299 5317 doi 10 1002 1521 3765 20011217 7 24 lt 5299 aid chem5299 gt 3 0 co 2 x PMID 11822430 Kocienski P J Protecting Groups Georg Thieme Verlag Germany 2000 Friesen R W et al 1991 A highly stereoselective conversion of a allenic alcohols to 1 2 syn amino alcohol derivatives via iodocarbamation Tetrahedron Lett 31 30 4249 4252 doi 10 1016 S0040 4039 00 97592 0 Imanieh et al 1992 A facile generation of a silyl carbanions Tetrahedron Lett 33 4 543 546 doi 10 1016 s0040 4039 00 93991 1 Ogilvie et al 1974 Selective protection of hydroxyl groups in deoxynucleosides using alkylsilyl reagents Tetrahedron Lett 116 33 2865 2868 doi 10 1016 s0040 4039 01 91764 2 Kadota et al 1998 Stereocontrolled Total Synthesis of Hemibrevetoxin B J Org Chem 63 19 6597 6606 doi 10 1021 jo9807619 Corey et al 1976 A new general method for protection of the hydroxyl function Tetrahedron Lett 17 11 809 812 doi 10 1016 s0040 4039 00 92890 9 Chiang et al 1989 Total synthesis of L 659 699 a novel inhibitor of cholesterol biosynthesis J Org Chem 54 24 5708 5712 doi 10 1021 jo00285a017 a b Corey et al 1982 Total synthesis of aplasmomycin Journal of the American Chemical Society 104 24 6818 6820 doi 10 1021 ja00388a074 Corey E J Seebach D 1965 Synthesis of 1 n Dicarbonyl Derivates Using Carbanions from 1 3 Dithianes Angew Chem Int Ed 4 12 1077 1078 doi 10 1002 anie 196510771 Wendt K U Schulz G E Liu D R Corey E J 2000 Enzyme Mechanisms for Polycyclic Triterpene Formation Angewandte Chemie International Edition in English 39 16 2812 2833 doi 10 1002 1521 3773 20000818 39 16 lt 2812 aid anie2812 gt 3 3 co 2 r PMID 11027983 See the Methods tab Compiled Works of Elias J Corey July 12 2008 Retrieved November 15 2013 Corey E J et al 1998 Reduction of Carbonyl Compounds with Chiral Oxazaborolidine Catalysts A New Paradigm for Enantioselective Catalysis and a Powerful New Synthetic Method Angew Chem Int Ed 37 15 1986 2012 doi 10 1002 sici 1521 3773 19980817 37 15 lt 1986 aid anie1986 gt 3 0 co 2 z PMID 29711061 a b c d e f g h Kurti L Czako B Strategic Applications of Named Reactions in Organic Synthesis Elsevier Burlington 2005 a b c d Corey E J Kurti L Enantioselective Chemical Synthesis Direct Book Publishing Dallas 2010 Corey E J Bakshi R K Shibata S 1987 Highly enantioselective borane reduction of ketones catalyzed by chiral oxazaborolidines Mechanism and synthetic implications Journal of the American Chemical Society 109 18 5551 5553 doi 10 1021 ja00252a056 a b c Corey et al 1987 A stable and easily prepared catalyst for the enantioselective reduction of ketones Applications to multistep syntheses Journal of the American Chemical Society 109 25 7925 7926 doi 10 1021 ja00259a075 Corey E J Roberts B E 1997 Total Synthesis of Dysidiolide Journal of the American Chemical Society 119 51 12425 12431 doi 10 1021 ja973023v Corey E J Fuch P L Tetrahedron Lett 1972 3769 Eymery et al Synthesis 2000 185 Michel et al 1999 A one pot procedure for the synthesis of alkynes and bromoalkynes from aldehydes Tetrahedron Lett 40 49 8575 8578 doi 10 1016 s0040 4039 99 01830 4 Donkervoot et al 1996 Development of modified Pauson Khand reactions with ethylene and utilisation in the total synthesis of taylorione Tetrahedron 52 21 7391 7420 doi 10 1016 0040 4020 96 00259 1 a b Corey E J Kim C U 1972 New and highly effective method for the oxidation of primary and secondary alcohols to carbonyl compounds Journal of the American Chemical Society 94 21 7586 7587 doi 10 1021 ja00776a056 E J Corey C U Kim 1974 A method for the oxidation of sec tert 1 2 diols to a hydroxy ketones without carbon carbon cleavage Tetrahedron Letters 15 3 287 290 doi 10 1016 S0040 4039 01 82195 X Kuwajima et al 2003 Total Synthesis of Ingenol Journal of the American Chemical Society 125 6 1498 1500 doi 10 1021 ja029226n PMID 12568608 Corey E J Winter A E 1963 A New Stereospecific Olefin Synthesis from 1 2 Diols Journal of the American Chemical Society 85 17 2677 2678 doi 10 1021 ja00900a043 Block 1984 Olefin Synthesis by Deoxygenation of Vicinal Diols Organic Reactions Vol 30 p 457 doi 10 1002 0471264180 or030 02 ISBN 978 0 471 26418 7 Shing et al 1998 Enantiospecific Syntheses of Crotepoxide Boesenoxide b Senepoxide Pipoxide Acetate iso Crotepoxide Senepoxide and Tingtanoxide from Quinic Acid 1 J Org Chem 63 5 1547 1554 doi 10 1021 jo970907o Nair et al 2007 Intramolecular 1 3 dipolar cycloaddition reactions in targeted syntheses Tetrahedron 63 50 12247 12275 doi 10 1016 j tet 2007 09 065 Corey E J et al 2004 Enantioselective and Structure Selective Diels Alder Reactions of Unsymmetrical Quinones Catalyzed by a Chiral Oxazaborolidinium Cation Predictive Selection Rules J Am Chem Soc 126 15 4800 4802 doi 10 1021 ja049323b PMID 15080683 Corey et al 1994 Demonstration of the Synthetic Power of Oxazaborolidine Catalyzed Enantioselective Diels Alder Reactions by Very Efficient Routes to Cassiol and Gibberellic Acid J Am Chem Soc 116 8 3611 3612 doi 10 1021 ja00087a062 Corey et al 1975 Synthesis of novel macrocyclic lactones in the prostaglandin and polyether antibiotic series Journal of the American Chemical Society 97 3 653 654 doi 10 1021 ja00836a036 PMID 1133366 Nicolaou K C 1977 Synthesis of macrolides Tetrahedron 33 7 683 710 doi 10 1016 0040 4020 77 80180 4 Shin Inji Hong Suckchang Krische Michael J 2016 11 02 Total Synthesis of Swinholide A An Exposition in Hydrogen Mediated C C Bond Formation Journal of the American Chemical Society 138 43 14246 14249 doi 10 1021 jacs 6b10645 ISSN 0002 7863 PMC 5096380 PMID 27779393 a b Corey E J Nicolaou K C 1974 Efficient and mild lactonization method for the synthesis of macrolides Journal of the American Chemical Society 96 17 5614 5616 doi 10 1021 ja00824a073 Corey E J Chaykovsky 1962 Dimethylsulfoxonium Methylide Journal of the American Chemical Society 84 5 867 868 doi 10 1021 ja00864a040 Corey E J Chaykovsky 1965 Dimethyloxosulfonium Methylide CH3 2SOCH2 and Dimethylsulfonium Methylide CH3 2SCH2 Formation and Application to Organic Synthesis Journal of the American Chemical Society 87 6 1353 1364 doi 10 1021 ja01084a034 Danishefsky et al 1996 Total Synthesis of Baccatin III and Taxol Journal of the American Chemical Society 118 12 2843 2859 doi 10 1021 ja952692a See the Syntheses tab Compiled Works of Elias J Corey ejcorey org July 12 2008 Retrieved November 15 2013 Corey E J Weinshenker N M Schaaf T K Huber W 1969 Stereo controlled synthesis of dl prostaglandins F2 alpha and E2 J Am Chem Soc 91 20 5675 5677 doi 10 1021 ja01048a062 PMID 5808505 K C Nicolaou E J Sorensen Classics in Total Synthesis VCH New York 1996 ISBN 3 527 29231 4 Corey E J Schaaf T K Huber W Koelliker V Weinshenker N M 1970 Total Synthesis of Prostaglandins F2a and E2 as the Naturally Occurring Forms Journal of the American Chemical Society 92 2 397 8 doi 10 1021 ja00705a609 PMID 5411057 For a review see Axen U Pike J E and Schneider W P 1973 p 81 in The Total Synthesis of Natural Products Vol 1 ApSimon J W ed Wiley New York Corey E J Ohno M Vatakencherry P A Mitra R B 1961 TOTAL SYNTHESIS OF d l LONGIFOLENE J Am Chem Soc 83 5 1251 1253 doi 10 1021 ja01466a056 Corey E J Ohno M Mitra R B Vatakencherry P A 1964 Total Synthesis of Longifolene J Am Chem Soc 86 3 478 485 doi 10 1021 ja01057a039 Corey E J Ghosh A K 1988 Total synthesis of ginkgolide a Tetrahedron Lett 29 26 3205 3206 doi 10 1016 0040 4039 88 85122 0 PMC 6781876 PMID 31595095 Corey E J Kang M Desai M C Ghosh A K Houpis I N 1988 Total synthesis of ginkgolide B J Am Chem Soc 110 2 649 651 doi 10 1021 ja00210a083 PMC 6746322 PMID 31527923 Corey E J 1988 Robert Robinson Lecture Retrosynthetic thinking essentials and examples Chem Soc Rev 17 111 133 doi 10 1039 cs9881700111 Corey E J Reichard G A 1992 Total Synthesis of Lactacystin J Am Chem Soc 114 26 10677 10678 doi 10 1021 ja00052a096 Corey E J Wu L I 1993 Enantioselective Total Synthesis of Miroestrol J Am Chem Soc 115 20 9327 9328 doi 10 1021 ja00073a074 Corey E J Gin D Y Kania R S 1996 Enantioselective Total Synthesis of Ecteinascidin 743 J Am Chem Soc 118 38 9202 9203 doi 10 1021 ja962480t Reddy Leleti Rajender Corey E J 2004 A Simple Stereocontrolled Synthesis of Salinosporamide A J Am Chem Soc 126 20 6230 6232 CiteSeerX 10 1 1 472 2554 doi 10 1021 ja048613p PMID 15149210 See Publications in Compiled Works of Elias J Corey ejcorey org November 15 2013 Retrieved November 15 2013 Baum Rudy August 21 2007 E J Corey Chemist Extraordinaire C amp EN Meeting Weblog 234th ACS National Meeting amp Exposition August 19 23 2007 Boston Massachusetts Retrieved September 8 2010 Van Noorden Richard April 23 2007 Hirsch index ranks top chemists RSC Advancing the Chemical Sciences Chemistry World Retrieved September 9 2010 a b Schneider Alison 1998 Harvard Faces the Aftermath of a Graduate Student s Suicide The Chronicle of Higher Education Retrieved August 21 2010 Hall Stephen S November 29 1998 Lethal Chemistry at Harvard The New York Times Hall Stephen December 29 1998 Lethal Chemistry at Harvard New York Times Retrieved September 26 2020 a b English Bella Grad student suicides spur big changes at Harvard chem labs Archived from the original on January 24 2001 Retrieved November 24 2010 a href Template Cite web html title Template Cite web cite web a CS1 maint bot original URL status unknown link The Boston Globe via Archive org January 2 2001 For the Media Examples of Good and Problematic Reporting Scapegoating New York Times Magazine Lethal Chemistry at Harvard American Foundation for Suicide Prevention AFSP 2010 Archived from the original on September 25 2006 Retrieved November 4 2012 The AFSP incorrectly identifies the author and date of The New York Times article as Keith B Richburg and November 28 1998 The author was Stephen S Hall and the date of publication was November 29 1998 H H M A 2010 For the Media Problematic Reporting Scapegoating American Foundation for Suicide Prevention AFSP Archived from the original on September 25 2006 Retrieved August 21 2010 Group Members Elias James Corey ejcorey org Retrieved 22 July 2021 See the E J Corey Impossible Dreams tabCorey E J April 30 2004 Impossible Dreams Vol 69 no 9 JOC Perspective pp 2917 2919 Retrieved September 10 2010 Johnson Carolyn Y March 1 2005 Whose idea was it Boston Globe Archived from the original on January 11 2012 Retrieved September 10 2010 Hoffman Roald December 10 2004 A Claim on the Development of the Frontier Orbital Explanation Electrocyclic Reactions Angewandte Chemie International Edition 43 48 6586 6590 doi 10 1002 anie 200461440 PMID 15558636 Golden Plate Awardees of the American Academy of Achievement www achievement org American Academy of Achievement See the E J Corey About E J Corey Honorary Degrees tab Compiled Works of Elias J Corey July 12 2008 Retrieved November 15 2013 The grand opening ceremony of E J Corey Institute of Biomedical Research CIBR E J Corey Institute of Biomedical Research June 29 2013 Archived from the original on June 20 2015 Retrieved August 26 2013 External links edit nbsp Wikimedia Commons has media related to E J Corey 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