Catalytic Antibody Route to the Naturally Occurring Epothilones: Total Synthesis of Epothilones A-F
作者:Subhash C. Sinha、Jian Sun、Gregory P. Miller、Markus Wartmann、Richard A. Lerner
DOI:10.1002/1521-3765(20010417)7:8<1691::aid-chem16910>3.0.co;2-9
日期:2001.4.17
synthesized starting from enantiomerically pure aldol compounds 9-11, which were obtained by antibody catalysis. Aldolase antibody 38C2 catalyzed the resolution of (+/-)-9 by enantioselective retro-aldol reaction to afford 9 in 90% ee at 50 % conversion. Compounds 10 and 11 were obtained in more than 99% ee at 50% conversion by resolution of their racemic mixtures using newly developed aldolase antibodies
天然存在的埃坡霉素已从对映异构纯的羟醛化合物 9-11 开始合成,这些化合物是通过抗体催化获得的。醛缩酶抗体 38C2 通过对映选择性逆醛醇反应催化 (+/-)-9 的拆分,以 50% 转化率提供 9 in 90% ee。通过使用新开发的醛缩酶抗体 84G3、85H6 或 93F3 拆分其外消旋混合物,化合物 10 和 11 的转化率为 99% 以上,转化率为 50%。化合物 9、10 和 11 以数克的量进行拆分,然后通过复分解过程转化为埃坡霉素,该过程由 Grubbs 催化剂催化。