One-Pot Twofold Unsymmetrical C–Si Bond 2,6-Bifunctionalization of Arenes via Sequential [1,4]-Csp<sup>2</sup> to <i>O</i>-Silyl Migration
作者:Kai Wang、Linjie Li、Tianbao Hu、Lu Gao、Zhenlei Song
DOI:10.1021/acs.joc.9b02014
日期:2019.10.4
two successive silyl migrations, and 4,7-dimethyl-o-phenanthroline ligand favors cleavage of the endocyclic C-Si bond. Diverse Csp3/Csp3 or Csp2/Csp3 electrophiles can be installed at the 2- and 6-positions. This approach was used to chemoselectively functionalize the three C-Si bonds of 2,4,6-tri(trimethylsilyl) benzyl alcohol, transforming it into isochroman derivatives. The approach even works as
通过顺序的[1,4] -Csp2到O-甲硅烷基的迁移,一个锅中已经实现了2,6-二(三甲基甲硅烷基)苄醇的两倍不对称C-Si键双官能化。羟基用作“开-关-开”开关,以控制两个连续的甲硅烷基迁移,并且4,7-二甲基-邻菲咯啉配体有利于内环C-Si键的裂解。可以在2位和6位安装不同的Csp3 / Csp3或Csp2 / Csp3亲电试剂。该方法用于将2,4,6-三(三甲基甲硅烷基)苄醇的三个C-Si键化学选择性官能化,将其转化为异色满衍生物。该方法甚至可以作为五组分反应来构建复杂的对称结构。