Nickel-Catalyzed Site-Selective Alkylation of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Xuesong Wu、Yan Zhao、Haibo Ge
DOI:10.1021/ja413131m
日期:2014.2.5
The direct alkylation of unactivated sp(3) C-H bonds of aliphatic amides was achieved via nickel catalysis with the assist of a bidentate directing group. The reaction favors the C-H bonds of methyl groups over the methylene C-H bonds and tolerates various functional groups. Moreover, this reaction shows a predominant preference for sp(3) C-H bonds of methyl groups via a five-membered ring intermediate
脂肪族酰胺的未活化 sp(3) CH 键的直接烷基化是通过镍催化在双齿导向基团的帮助下实现的。该反应有利于甲基的 CH 键而不是亚甲基的 CH 键,并且可以耐受各种官能团。此外,该反应表明,在环金属化步骤中,甲基的 sp(3) CH 键通过五元环中间体优先于芳烃的 sp(2) CH 键。