Progress towards the total synthesis of guanacastepene A. Approaches to the construction of quaternary carbons and the 5-7-6 tricyclic carbon skeleton
作者:Truc M. Nguyen、Daesung Lee
DOI:10.1016/s0040-4039(02)00729-3
日期:2002.5
The construction of the 5-7-6 tricyclic skeleton of guanacastepene A, including the quaternary carbons, has been achieved. The C-11 and C-8 quaternary carbons were constructed by cuprate addition and carbene insertion, respectively. The 5-7-6 tricyclic core was generated by a selective aldol and SmI2-induced intramolecular aldehyde–alkene coupling.
已完成了包括季碳在内的瓜纳卡斯汀A的5-7-6三环骨架的构建。C-11和C-8季碳分别通过添加铜酸盐和卡宾而构建。5-7-6三环核心是由选择性羟醛和SmI 2诱导的分子内醛-烯烃偶联产生的。