Su Yingpeng, Xu Yanfen, Han Junjie, Zheng Jiyue, Qi Jing, Jiang Tuo, Pan Xinfu, She Xuegong
Department of Chemistry, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
J Org Chem. 2009 Apr 3;74(7):2743-9. doi: 10.1021/jo9000146.
An efficient total synthesis of (-)-bitungolide F (6) in 17 steps and 20.1% yield is described herein. Key steps involve a Myers asymmetric alkylation to introduce the C6 methyl with proper stereochemistry, a Claisen-like cyclization to construct the alpha,beta-unsaturated delta-lactone and a Julia-Kocienski olefination to assemble the conjugated diene moiety.
本文描述了一种以17步反应、20.1%的产率高效全合成(-)-比通内酯F(6)的方法。关键步骤包括迈尔斯不对称烷基化反应,以引入具有适当立体化学的C6甲基;类似克莱森缩合的环化反应,构建α,β-不饱和δ-内酯;以及朱利亚-科琴斯基烯烃化反应,组装共轭二烯部分。