78139-56-7

Basic information

• Product Name: (2R,3R,4R)-2,3-cis-3,4-trans-3',4',7,8-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-6-yl>flavan
• CAS NO: 78139-56-7
• Molecular Weight: 562.53
• Mol File: 78139-56-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (2R,3R,4R)-2,3-cis-3,4-trans-3',4',7,8-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-6-yl>flavan(CAS DataBase Reference)
• NIST Chemistry Reference: (2R,3R,4R)-2,3-cis-3,4-trans-3',4',7,8-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-6-yl>flavan(78139-56-7)
• EPA Substance Registry System: (2R,3R,4R)-2,3-cis-3,4-trans-3',4',7,8-tetrahydroxy-4-<(2R,3S)-2,3-trans-3,3',4',5,7-pentahydroxyflavan-6-yl>flavan(78139-56-7)

Safety Data

• Hazardous Substances Data: 78139-56-7(Hazardous Substances Data)

Upstream product

• 577-30-0 epioritin-4α-ol 
• 154-23-4 catechin 

Relevant articles and documents

Synthesis of Condensed Tannins. Part 4. A Direct Biomimetic Approach to - and -Biflavanoids

The generation of flavanyl-4-carbo-cations from flavan-3,4-diols and their condensation with nucleophilic flavan-3-ols to form - and -biflavanoids at ambient temperatures and mildly acidic aqueous conditions apparently simulates the initial step in condensed tannin formation in a number of natural sources.The stereospecificity (or stereoselectivity) of the reaction is conditioned mainly by the 2,3-cis or 2,3-trans stereochemistry of the parent flavan-3,4-diol, but also by the nuclephilicity of the flavan-3-ol, and its regiospecific (or regioselective) course by steric factors arising from variation in substitution of the receptive A-ring of the flavan-3-ol.