We report the iridium-catalysed desilylative acylation of styryl and dienyl silanes by acid anhydrides to afford (E)-alpha,beta-unsaturated ketones. The [Ir(mu-Cl)(cod)}(2)] catalyst is the first non-rhodium complex successfully applied for this type of transformation. Stoichiometric reaction of [Ir(mu-Cl)(cod)}(2)] with (E)-trimethyl(4-chlorostyryl)silane was carried out to gain insight into the reaction mechanism. (C) 2016 Elsevier B.V. All rights reserved.
Cobalt-Catalyzed Enantiospecific Dynamic Kinetic Cross-Electrophile Vinylation of Allylic Alcohols with Vinyl Triflates
作者:Wei-Yuan Ma、Guan-Yu Han、Shaolin Kang、Xiaobo Pang、Xue-Yuan Liu、Xing-Zhong Shu
DOI:10.1021/jacs.1c08695
日期:2021.10.6
unknown. Herein, we report a cobalt-catalyzed enantiospecific vinylation reaction of allylicalcohol with vinyl triflates. This work establishes a new method for the synthesis of enantioenriched 1,4-dienes. The reaction proceeds through a dynamic kinetic coupling approach, which not only allows for direct functionalization of allylicalcohols but also is essential to achieve high chemoselectivity. The