作者:Kiyoshi Tomioka、Kenji Koga
DOI:10.1016/s0040-4020(01)86137-8
日期:1988.1
An alkaloid sesbanine (1) was synthesized starting from 1-malic acid as a chiral four-carbon unit. The key step was a highly stereoselective cycloannelation reaction to form a chiral quaternary carbon center. By this synthesis, the absolute configuration of natural sesbanine was established to 1. Furthermore, sesbanine, in both optically active and racemic forms, was found to be marginaly cytotoxic
以1-苹果酸为手性四碳单元,合成了生物碱芝麻素碱(1)。关键步骤是形成一个手性季碳中心的高度立体选择性环退火反应。通过该合成,将天然芝麻素的绝对构型确定为1。此外,发现光学活性和外消旋形式的芝麻素均具有微弱的细胞毒性,与报道的显着的细胞毒性相反。