A Novel Chiral Sulfonium Yilde: Highly Enantioselective Synthesis of Vinylcyclopropanes
作者:Song Ye、Zheng-Zheng Huang、Chun-An Xia、Yong Tang、Li-Xin Dai
DOI:10.1021/ja0172969
日期:2002.3.1
allylide, generated in situ from the corresponding sulfonium salt in the presence of KOBu(t), reacted with alpha,beta-unsaturated esters, ketones, amides, and nitriles to afford trans-2-silylvinyl-trans-3-substituted cyclopropyl esters, ketones, amides, and nitriles with outstanding diastereoselectivity and excellent enantioselectivity in good to high yields. A mechanistic rationale is proposed.
一种新设计的手性锍烯丙基化物,在 KOBu(t) 存在下由相应的锍盐原位生成,与 α,β-不饱和酯、酮、酰胺和腈反应得到反式-2-甲硅烷基乙烯基-反式-3 -取代的环丙基酯、酮、酰胺和腈,具有出色的非对映选择性和出色的对映选择性,收率良好。提出了机械原理。