896121-49-6

Upstream product

• 100-39-0 benzyl bromide 
• 154-23-4 catechin 
• 117-39-5 quercetol 
• 183067-65-4 7-(benzyloxy)-2-(3,4-bis(benzyloxy)phenyl)-3,5-dihydroxy-4H-chromen-4-one 
• 480-66-0 2,4,6-trihydroxyacetophenone 
• 18065-05-9 1-[2,4-bis(benzyloxy)-6-hydroxyphenyl]ethanone 
• 67052-53-3 4',6'-bis(benzyloxy)-2'-(methoxymethoxy)acetophenone 

Downstream Products

• 2387-23-7 1,3-Dicyclohexylurea 
• 154-23-4 catechin 
• 35323-91-2 (+)-epicatechin 
• 490-46-0 (2R,3R)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-1[2H]-benzopyran-3,5,7-triol 

Relevant academic research and scientific papers

A catechin preparation method of compound (by machine translation)

The invention relates to a method for preparing a catechin compound. The method comprises the following steps: by taking 2,4,6-trihydroxy acetophenone and p-hydroxy benzaldehyde as raw materials, carrying out condensation reaction, restored deoxidation, cyclization reaction of acid catalysis, so as to obtain the catechin compound. The invention also provides a technology for producing the catechin compound. In the synthesis process of an immediate 9, reduction is carried out by using sodium borohydride which is catalyzed by a lewis acid, so that side reaction caused by double bond transfer is greatly reduced while a highly toxic reagent osmium tetroxide is replaced with hydrogen peroxide oxidation.

NOVEL APPROACH FOR SYNTHESIS OF CATECHINS

A process for synthesis of enatiomerically pure or enatiomerically enriched or racemic mixture of (+and/or?) epicatechin echm and its intermediates, comprising the steps of: (i) obtaining penta-protected quercetin; (ii) reducing the penta-protected quercetin obtained from step (i); (iii) optionally deprotecting the compound of step (ii); (iv) reducing the compound obtained from step (ii) or step (iii) in the presence of a chiral/achiral reducing agent to obtain a chiral intermediate; (v) deprotecting and/or hydrogenation of the chiral intermediate obtained from step (iv) to obtain (?)-epicatechin; (vi) optionally simultaneously deprotecting and by drogenation of the compound obtained from step (ii) to obtain racemic epicatechin.

Synthetic methods for preparation of protected proanthocyanidin(s)

A process is disclosed for the production of polyphenol oligomers having n polyphenol monomeric units, n being an integer from 2-18. The process includes coupling of a protected polyphenol, having protected phenolic hydroxyl groups, with a C-4 functionali

Process for preparing procyanidin(4-6 or 4-8) oligomers and their derivatives

A process is disclosed for the production of polyphenol oligomers having n polyphenol monomers, n being an integer from 2-18. The process includes coupling of a protected polyphenol, having protected phenolic hydroxyl groups, with a C-4 functionalized pol

8+Z 8, 6+Z 6, and 6+Z 8 catechin and epicatechin dimers and methods for their preparation

Novel catechin and epicatechin dimers with (8+Z 8), (6+Z 6), and (8+Z 6) linkages are prepared, as well as digallated dimers. A novel process for preparing these compounds is disclosed which involves the oxidative or reductive coupling of protected monome