Transition-Metal-Free Silylation of Unactivated C(sp<sup>2</sup>)–H Bonds with <i>tert</i>-Butyl-Substituted Silyldiazenes
作者:Baptiste Neil、Franck Lucien、Louis Fensterbank、Clément Chauvier
DOI:10.1021/acscatal.1c03824
日期:2021.11.5
Aromatic organosilanes bearing C(sp2)–Si bonds have found increasing applications across the chemical science, yet are mostly produced by atom-uneconomical stoichiometric procedures. Catalytic alternatives using hydrosilanes as silicon sources have also been described, but they display unfavorable thermodynamics and are mostly based on expensive catalytic systems, often derived from noble metals, or
带有 C(sp 2 )-Si 键的芳族有机硅烷在化学科学中的应用越来越多,但主要是通过原子不经济的化学计量程序生产的。还描述了使用氢硅烷作为硅源的催化替代品,但它们显示出不利的热力学,并且主要基于昂贵的催化系统,通常源自贵金属,或缺乏通用性。在此,我们描述了替代硅源的使用,即叔丁基取代的甲硅烷基二氮烯 ( t Bu-N=N-SiR 3 ),它很容易从市售前体中获得,并且其结构使 C(sp 2)-H 键硅烷化未活化的杂芳基和芳基化合物在无过渡金属的环境催化条件下。