125090-71-3

Upstream product

• 186581-53-3 diazomethane 
• 108-24-7 acetic anhydride 
• 125090-67-7 (2R,3S,4R)-4-(3,4-Dihydroxy-phenyl)-2-(2,4-dihydroxy-phenyl)-chroman-3,5,7-triol 
• 125090-65-5 (2S,3S,4R)-4-(3,4-Dihydroxy-phenyl)-2-(2,4-dihydroxy-phenyl)-chroman-3,5,7-triol 
• 65052-93-9 (2R,3R,4S)-4-(2,4-Dihydroxy-phenyl)-2-(3,4-dihydroxy-phenyl)-chroman-3,5,7-triol 
• 125136-18-7 (2S,3R,4S)-4-(2,4-Dihydroxy-phenyl)-2-(3,4-dihydroxy-phenyl)-chroman-3,5,7-triol 
• 125090-62-2 2-[(2R,3R,4S)-2-(3,4-Dihydroxy-phenyl)-3,7-dihydroxy-chroman-4-yl]-benzene-1,3,5-triol 

Relevant academic research and scientific papers

OLIGOMERIC FLAVANOIDS.PART 6.EVIDENCE SUPPORTING THE INVERSION OF ABSOLUTE CONFIGURATION AT 3-C ASSOCIATED WITH BASE CATALYSED A-/B-RING INTERCHANGE OF PRECURSORS HAVING 2,3-TRANS-3,4-CIS-FLAVAN-3-OL CONSTITUENT UNITS

Whereas the enantiomeric 2,3-trans-3,4-trans-arylflavan-3-ols (10) and (12) as biflavanoid models are subject to stereospecific C-ring isomerisation under base catalysis, those with 3,4-cis configuration (11) and (13) are transformed stereoselectively via