作者:Zhibin Du、Shiwen Liu、Yuke Li、Junjie Peng、Yanji Sun、Yanshan Song、Yuxuan Liu、Xiaojun Zeng
DOI:10.1021/acs.orglett.3c01297
日期:2023.6.30
Herein, by exploiting different activation modes of fluoroamides, we achieved α- and δ-C(sp3)–H alkylation of nitroalkanes with switchable regioselectivity. Cu catalysis enabled the interception of a distal C-centered radical by a N-centered radical to couple nitroalkanes and unactivated δ-C–H bonds. In addition, imines generated in situ by fluoroamides were trapped by nitroalkanes to realize the α-C–H
在此,通过利用氟酰胺的不同活化模式,我们实现了具有可切换区域选择性的硝基烷烃的α-和δ-C(sp 3 )–H烷基化。Cu 催化作用使得以 N 为中心的自由基拦截远端以 C 为中心的自由基,从而偶联硝基烷烃和未活化的 δ-C-H 键。此外,氟酰胺原位生成的亚胺被硝基烷烃捕获,实现酰胺的α-C-H烷基化。这两种可扩展的协议都具有广泛的底物范围和良好的官能团耐受性。