作者:Jeong-Hun Sohn、Nobuaki Waizumi、H. Marlon Zhong、Viresh H. Rawal
DOI:10.1021/ja050728l
日期:2005.5.25
This communication describes a concise and efficient total synthesis of mycalamide A by the convergent coupling of pederic acid unit with the mycalamine unit. The left-half, (+)-7-benzoylpederic acid, was synthesized from (2R,3R)-3-methylpent-4-en-2-ol in seven steps and 34.6% overall yield through a route that features a one-step Pd(II)-catalyzed tandem Wacker/Heck cyclization reaction to prepare
该通讯描述了通过 pederic acid 单元与 mycalamine 单元的会聚偶联对 mycalamide A 进行简明有效的全合成。左半部分 (+)-7-苯甲酰哌啶酸是由 (2R,3R)-3-methylpent-4-en-2-ol 合成的,分七步合成,总产率为 34.6%。步骤Pd(II)-催化串联Wacker/Heck环化反应制备四氢吡喃环体系。右半部分,即霉胺单元,由 d-酒石酸二乙酯分 21 个步骤合成,总产率为 10.5%。开发了有效的立体选择性方法来组装两个部分,以产生 mycalamide A 或 C(10)-epi-mycalamide A。