Synthesis of cyanoalkyl indolines through cyanoalkylarylation of N-allyl anilines with alkyl nitriles under metal-free and neutral conditions
作者:Deqiang Liang、Xuemei Song、Lichun Xu、Yitong Sun、Ying Dong、Baoling Wang、Weili Li
DOI:10.1016/j.tet.2019.05.018
日期:2019.6
An α-C(sp3)−H functionalization of alkyl nitriles under metal-free and neutral conditions is presented. In the presence of di-tert-butyl peroxide (DTBP), N-allyl anilines underwent exo-selective cyanoalkylation/cyclization cascade, providing a direct access to 3-cyanoalkyl indolines. Previously, a transition-metal catalyst and/or a strong base were generally required to activate nitrilic α-C−H bonds
提出了在无金属和中性条件下烷基腈的α-C(sp 3)-H官能化。在二-的存在下叔丁基过氧化物(DTBP),ñ -烯丙基苯胺后行外型-选择性氰烷基化/环化级联,提供到3-氰基二氢吲哚的直接访问。以前,通常需要过渡金属催化剂和/或强碱来激活腈基α-CH键。该反应具有广泛的底物范围和低成本,并且伯,仲和叔吲哚-3-基腈都可以组装。