作者:Kouki Ogawa、Yasuhito Koyama、Isao Ohashi、Itaru Sato、Masahiro Hirama
DOI:10.1002/anie.200805518
日期:2009.1.26
Strong support for the recently proposed structure of the kedarcidin chromophore has been obtained through the convergent synthesis of the aglycon. The key features of the synthesis are an efficient assembly of the four fragments, a novel strategy involving an alkynyl epoxide, a cerium amide promoted nine‐membered diyne ring cyclization, and a SmI2‐mediated reductive 1,2‐elimination. TBS=tert‐butyldimethylsilyl
通过糖苷配基的合成,已为最近提出的那达木丁发色团的结构提供了有力的支持。合成的关键特征是四个片段的有效组装,涉及炔基环氧化物的新策略,铈酰胺促进的九元二炔环化和SmI 2介导的还原性1,2-消除。TBS =叔丁基二甲基甲硅烷基,MOM =甲氧基甲基。