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
作者:Guo-Qiang Lin、Min Zhong
DOI:10.1016/s0040-4039(96)02475-6
日期:1997.2
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.
描述了光学纯的(R)-和(S)-5,5“-二羟基-4',4‴,7,7”-四甲氧基-8,8“-双黄酮的第一对映选择性合成。关键步骤涉及氰铜酸盐中间体的分子内氧化偶联和Friedel-Crafts重排。CD光谱再次证实了它们的绝对构型。