In model solutions, colorless compounds, such as catechin, can give rise to new types of pigments. The first step is the formation of colorless dimeric compounds consisting of two flavanol units linked by carboxy-methine bridge. This is followed by the formation of xanthylium salt yellowish pigments and their ethyl esters, resulting from the dehydration of the colorless dimers, followed by an oxidation process. The loss of a water molecule takes place between two A ring hydroxyl groups of the colorless dimers.[1]
compound, xanthylium, yellowish, pigment, found, wine, names, iupac, name, dihydroxyphenyl, tetrahydroxy, dioxa, oxoniapentacyclo, docosa, heptaene, carboxylic, acid, identifiers, model, jsmol, interactive, image, pubchem, 73194534, inchi, inchi, c32h24o13, 1k. Compound NJ2 is a xanthylium yellowish pigment found in wine Compound NJ2 Names IUPAC name 6 20 bis 3 4 dihydroxyphenyl 7 10 16 19 tetrahydroxy 5 21 dioxa 13 oxoniapentacyclo 12 8 0 03 12 04 9 017 22 docosa 1 3 12 4 9 10 13 15 17 22 heptaene 2 carboxylic acid Identifiers 3D model JSmol Interactive image PubChem CID 73194534 InChI InChI 1S C32H24O13 c33 15 3 1 11 5 19 15 37 28 21 39 7 13 17 35 9 23 25 30 13 44 28 27 32 41 42 26 24 43 23 10 18 36 14 8 22 40 29 45 31 14 26 12 2 4 16 34 20 38 6 12 h1 6 9 10 21 22 28 29 39 40H 7 8H2 H6 33 34 35 36 37 38 41 42 p 1Key VVMHZAVGHYVZHM UHFFFAOYSA O SMILES Oc6ccc cc6O C7Oc c5CC7O c4c C O O c c cc1O o c4cc5O c c1CC2O OC2c cc3O ccc3O Properties Chemical formula C 32H 25O 13 Molar mass 617 539 g mol 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references In model solutions colorless compounds such as catechin can give rise to new types of pigments The first step is the formation of colorless dimeric compounds consisting of two flavanol units linked by carboxy methine bridge This is followed by the formation of xanthylium salt yellowish pigments and their ethyl esters resulting from the dehydration of the colorless dimers followed by an oxidation process The loss of a water molecule takes place between two A ring hydroxyl groups of the colorless dimers 1 See also editWine color Phenolic content in wineReferences edit Es Safi Nour Eddine Le Guerneve Christine Fulcrand Helene Cheynier Veronique Moutounet Michel 2000 Xanthylium salts formation involved in wine colour changes International Journal of Food Science amp Technology 35 63 74 doi 10 1046 j 1365 2621 2000 00339 x nbsp This article about an aromatic compound is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Compound NJ2 amp oldid 1213509241, wikipedia, wiki, book, books, library,
