187404-35-9

Upstream product

• 187404-33-7 (2R,3R)-1,4-Bis-benzyloxy-3-(tert-butyl-dimethyl-silanyloxy)-butan-2-ol 
• 91604-41-0 (R,R)-1,4-dibenzylthreitol 
• 187404-34-8 [(1R,2S)-3-Benzyloxy-1-benzyloxymethyl-2-(2-iodo-3,5-dimethoxy-phenoxy)-propoxy]-tert-butyl-dimethyl-silane 

Downstream Products

• 187404-36-0 C₃₄H₃₆I₂O₈ 
• 13738-92-6 4′,4′′′,7,7′′-tetra-O-methylcupressuflavone 

Relevant academic research and scientific papers

The first enantioselective synthesis of optically pure (R)- and (S)- 5,5''-dihydroxy-4',4''',7,7''-tetramethoxy-8,8''- biflavone and the reconfirmation of their absolute configuration

The first enantioselective synthesis of the optically pure (R)- and (S)-5,5''-dihydroxy-4',4''',7,7''-tetramethoxy-8,8''- biflavone is described. The key steps involve the intramolecular oxidative coupling of the cyanocuprate intermediate and Friedel-Crafts rearrangement. Their absolute configuration was reconfirmed by CD spectra.