81410-23-3

Basic information

• Product Name: 8-bromocatechin pentaacetate
• CAS NO: 81410-23-3
• Molecular Weight: 579.355
• Mol File: 81410-23-3.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: 8-bromocatechin pentaacetate(CAS DataBase Reference)
• NIST Chemistry Reference: 8-bromocatechin pentaacetate(81410-23-3)
• EPA Substance Registry System: 8-bromocatechin pentaacetate(81410-23-3)

Safety Data

• Hazardous Substances Data: 81410-23-3(Hazardous Substances Data)

Upstream product

• 108-24-7 acetic anhydride 
• 88038-01-1 8-bromo-(-)-epicatechin 
• 88489-00-3 (2R,3S)-8-Bromo-2-(3,4-dihydroxy-phenyl)-chroman-3,5,7-triol 
• 84282-42-8 catechin pentaacetate 

Downstream Products

• 82246-04-6 6-p-acetoxybenzyl-8-bromo-3,3',4',5,7-penta-O-acetyl-(+)-catechin 
• 2937-64-6 4-(acetyloxy)benzyl acetate 

Relevant articles and documents

IODINATION AND DEUTERATION OF CATECHIN DERIVATIVES

The preparation and 1H and 13C nuclear magnetic reonance spectra of ten monoiodocatechin derivatives are described.The iodination of catechin with N-iodosuccinimide (NIS) takes place regiospecifically at C-6 in acetone but preferentially at C-8 in dimethylformamide; both products can be derivatized at oxygen in alkali medium but lose iodine in the presence of acid. 3',4',5,7,-Tetra-O-methylcatechin reacts with NIS regiospecifically at C-8 while catechin pentaacetate resists iodination.The debromination of 6-bromo- and 6,8-dibromocatechin with sodium sulfite in CD3CN/D2O is accompained by H/D-exchange at C-6 and C-8.The synthesis of catechin pentaacetate from partially deuterated catechin and its conversion to terta-O-methylcatechin proceed without H/D-exchange and permit distinction between the H-6 and H-8 chemical shifts.

Tannins and Related Compounds. Part 13. Isolation and Structures of Trimeric, Tetrameric, and Pentameric Proanthicyanidins from Cinnamon

A proanthocyanidin trimer, two tetramers, and a pentamer have been isolated in their free phenolic forms from cinnamon, the bark of Cinnamomum zeylanicum (Lauraceae).Partial acid-catalysed degradation of these tannins with phenylmethanethiol, in conjunction with 1H- and 13C-n.m.r. analysis, has unequivocally established their structures as epicatechin-(4β->8, 2β->7)epicatechin-(4α->8)-epicatechin (5); epicatechin-(4β->8)epicatechin-(4β->8, 2β->7)-epicatechin-(4α->8)-epicatechin (6); epicatechin-(4β->6)-epicatechin-(4β->8, 2β->7)-epicatechin-(4α->8)-epicatechin (7); and epicatechin-(4β->8)-epicatechin-(4β->8)epicatechin-(4β->8, 2β->7)-epicatechin-(4α->8)-epicatechin (8).