Introduction of Cyclopropyl and Cyclobutyl Ring on Alkyl Iodides through Cobalt-Catalyzed Cross-Coupling
作者:Claire Andersen、Vincent Ferey、Marc Daumas、Patrick Bernardelli、Amandine Guérinot、Janine Cossy
DOI:10.1021/acs.orglett.9b00579
日期:2019.4.5
A cobalt-catalyzed cross-coupling between alkyl iodides and cyclopropyl, cyclobutyl, and alkenyl Grignard reagents is disclosed. The reaction allows the introduction of strained rings on a large panel of primary and secondary alkyl iodides. The catalytic system is simple and nonexpensive, and the reaction is general, chemoselective, and diastereoconvergent. The alkene resulting from the cross-coupling
公开了烷基碘与环丙基,环丁基和烯基格氏试剂之间的钴催化的交叉偶联。该反应允许在一大批伯和仲烷基碘上引入应变环。催化体系简单且不昂贵,反应是一般的,化学选择性的和非对映的。可以使用Simmons-Smith反应将交叉偶联产生的烯烃转化为取代的环丙烷。假设在偶联过程中自由基中间体的形成。