Efficient Synthesis of Optically
Active Gallocatechin-3-gallate Derivatives via 6-<i>endo</i>-Cyclization
作者:Toshiyuki Kan、Yasuo Hirooka、Mariko Nitta、Takumi Furuta
DOI:10.1055/s-0028-1087371
日期:——
Optically active dihydrobenzopyran derivatives are synthesized by 6-endo cyclization of corresponding epoxy-phenol, which is readily derived from the enantioselective epoxidation of 1,3-diarylpropene. Synthetic dihydrobenzopyrans are converted into (-)-5,7-dideoxy-gallocatechin gallate as well as (-)-5,7-dideoxy-epigallocatechin derivative.
光学活性二氢苯并
吡喃衍
生物是通过相应环氧
苯酚的6-内环化合成的,该衍
生物很容易源自1,3-二芳基
丙烯的对映选择性环氧化。合成的二氢苯并
吡喃可转化为 (-)-5,7-二脱氧-
没食子儿茶素没食子酸酯以及 (-)-5,7-二脱氧-表没食子
儿茶素衍
生物。