Enantioselective Total Synthesis of the Marine Toxin (−)-Gymnodimine Employing a Barbier-Type Macrocyclization
作者:Ke Kong、Daniel Romo、Changsuk Lee
DOI:10.1002/anie.200903432
日期:2009.9.21
Sea the synthesis: At ambient temperature, tert‐butyllithium promotes a Barbier‐type macrocyclization in the first total synthesis of (−)‐gymnodimine (Ts: toluene‐4‐sulfonyl; TBS: tert‐butyldimethylsilyl), a member of the spirocyclic‐imine family of marine toxins. The synthesis also features a vinylogous Mukaiyama aldol process to couple the labile butenolide moiety onto a macrocyclic ketone intermediate
海合成:在环境温度下,叔丁基锂在 (-)-gymnodimine(Ts:甲苯-4-磺酰基;TBS:叔丁基二甲基甲硅烷基)的第一次全合成中促进 Barbier 型大环化,它是螺环的成员亚胺类海洋毒素。该合成还采用了乙烯基 Mukaiyama 醛醇工艺,将不稳定的丁烯内酯部分偶联到大环酮中间体上。