作者:T. Vijaya Kumar、K. Suresh Babu、J. Madhusudana Rao
DOI:10.1016/j.tetlet.2012.01.123
日期:2012.4
A simple and straightforward stereoselective synthesis of α,β-unsaturated δ-lactone, (−)-cleistenolide has been accomplished in 10 steps in an overall yield of 19%, starting from inexpensive and commercially available starting materials, respectively. This linear synthesis utilizes Sharpless asymmetric dihydroxylation, sulfur ylide mediated epoxide opening followed by ring-closing metathesis (RCM)
α,β-不饱和δ-内酯,(-)-苦丁烯内酯的简单,直接的立体选择性合成已分别从廉价和可商购的起始原料开始,以10个步骤完成,总产率为19%。该线性合成利用Sharpless不对称二羟基化反应,硫叶立德介导的环氧化物开环,然后闭环易位(RCM)形成六元内酯环作为关键步骤序列。