Forming Tertiary Organolithiums and Organocuprates from Nitrile Precursors and their Bimolecular Reactions with Carbon Electrophiles to Form Quaternary Carbon Stereocenters
作者:Martin J. Schnermann、Nicholas L. Untiedt、Gonzalo Jiménez-Osés、Kendall N. Houk、Larry E. Overman
DOI:10.1002/anie.201205001
日期:2012.9.17
Unstabilized tertiary organolithium intermediates are conveniently generated by reductive decyanation of nitriles, and these reagents and their derived cuprates couple in useful yields with carbon‐ centered electrophiles (see example). Chiral tertiary organolithium and organocuprate derivatives of substituted cis‐perhydroazulenes and cis‐perhydropentalenes react with electrophiles with high diastereoselectivity
通过腈的还原脱氰化可以方便地生成不稳定的叔有机锂中间体,这些试剂及其衍生的铜酸盐与以碳为中心的亲电子试剂偶联,产生有用的产率(参见示例)。取代的顺式全氢薁烯和顺式全氢戊二烯的手性叔有机锂和有机铜酸盐衍生物与亲电子试剂从受阻较多的凹面以高非对映选择性反应。