First enantioselective total synthesis of (−)-dysibetaine CPa and absolute configurations of natural product
作者:Michihiro Sakai、Yuichi Ishikawa、Satoshi Takamizawa、Masato Oikawa
DOI:10.1016/j.tetlet.2013.08.113
日期:2013.10
total synthesis of enantiomerically pure dysibetaine CPa, isolated from Micronesian marine sponge and expected to serve as a neuroactive agent. Starting from meso-cyclopropane triester, the synthesis was achieved in 12.8% overall yield over 10 steps including organocatalytic enantioselective solvolysis of meso-succinic anhydride as a key step. This work established the absolute configurations of the
在这里,我们报告了从密克罗尼西亚海洋海绵中分离出来的对映体纯的dysibetaine CPa的总合成,并有望用作神经活性剂。从开始内消旋-环丙烷三酯,合成是在12.8%的总收率超过10个步骤,包括对映体选择性有机催化溶剂分解来实现内消旋-琥珀酸酐作为关键步骤。这项工作确定了天然产物的绝对构型为(3 R,4 R)。