作者:Robert J. Mycka、Omar W. Steward、Fraser F. Fleming
DOI:10.1021/ol101030r
日期:2010.7.2
centers are efficiently installed in chelation-controlled alkylations of acyclic hydroxynitriles. Intriguingly, the stereoselectivity is determined by the nature of the electrophile and the structure of the Grignard used for the deprotonation. The alkylation strategy addresses the long-standing difficulty of performing diastereoselective alkylations with conformationally mobile, acyclic nitriles.
季铵中心可有效地安装在无环羟基腈的螯合控制烷基化反应中。有趣的是,立体选择性由亲电试剂的性质和用于去质子化的格利雅(Grignard)结构决定。烷基化策略解决了使用构象可移动的无环腈进行非对映选择性烷基化的长期难题。