109671-69-4

Upstream product

• 186581-53-3 diazomethane 
• 109671-68-3 (2R,3S,2'R,3'S)-2,2'-Bis-(3,4-dimethoxy-phenyl)-7,8,5',7'-tetramethoxy-3,4,3',4'-tetrahydro-2H,2'H-[5,8']bichromenyl-3,3'-diol 

Downstream Products

• 109671-63-8 (R)-<(2R,3S)-2,3-trans-3,7-diacetoxy-8-<(2R,3S)-2,3-trans-3-acetoxy-3',4',7,8-tetramethoxyflavan-5-yl>-3',4',5-trimethoxyflavan> 

Relevant academic research and scientific papers

Synthesis of Condensed Tannins. Part 17. Oligomeric (2R,3S)-3,3',4',7,8-Pentahydroxyflavans: Atropisomerism and Conformation of Biphenyl and m-Terphenyl Analogues from Prosopis glandulosa ('Mesquite')

(2R,3S)-2,3-trans-3',4',7,8-Tetrahydroxyflavan-3-ol , the predominant metabolite in the heartwood of Prosopis glandulosa, represents a putative precursor of a variety of oligomers, including conventional - and -biflavan-3-ols, a -1,3-diarylpropylflavan-3-ol, - and atropisomeric -biphenyl-type biflavan-3-ols, and -m-terphenyl-type triflavan-3-ols.Other participants in these condensations are mainly (+)-catechin, and also the flavan-3,4-diol analogue of (+)-mesquitol.Oligomeric structures were confirmed by biomimetic oxidative and acid-induced couplings, and by nuclear Overhauser effect difference spectroscopy.These applications enabled correction of previous structural assignments for atropisomeric -(+)-mesquitol-(+)-catechins and -bis--(+)-catechins, and determination of their conformations.