The development of a general, nickel-catalyzed alkyl-Mizoroki-Heck reaction of unactivated alkyl bromides is described. The mild reaction proceeds efficiently using a wide range of primary and secondary alkyl bromides, and examples of intermolecular cross-couplings are provided. Reaction alkene regioselectivity is significantly enhanced over prior carbocyclizations using palladium catalysis. Mechanistic
描述了未活化烷基
溴的一般
镍催化烷基-Mizoroki-Heck 反应的发展。使用各种伯烷基
溴和仲烷基
溴,温和的反应可以有效进行,并提供了分子间交叉偶联的例子。与之前使用
钯催化的碳环化反应相比,反应烯烃区域选择性显着增强。与之前用
钯催化观察到的自动串联原子转移环化和卤化物消除相反,机理研究与直接碳环化一致。