Reductive Homocoupling of Organohalides Using Nickel(II) Chloride and Samarium Metal
作者:Yongjun Liu、Shuhuan Xiao、Yan Qi、Feng Du
DOI:10.1002/asia.201601712
日期:2017.3.16
(benzyl, aryl, heterocyclic, alkenyl and alkyl halides), α‐haloacetophenones, and phenyl organosulfonates were tolerated, and the reaction afforded coupling products with high efficiency. Excellent chemoselectivity was exhibited between halides and other groups, such as −COOH, −NO2, halogen, heterocyclic ring, ester, and ketone groups. The stereoselectivity suggested that the reaction mechanism might
已经开发了一种由sa金属和HMPA促进并由NiCl 2催化的有机卤化物和有机磺酸盐的均相偶联方法。可以耐受各种有机卤化物(苄基,芳基,杂环,烯基和烷基卤化物),α-卤代苯乙酮和有机磺酸苯基酯,该反应可提供高效偶联产物。在卤化物和其他基团如-COOH,-NO 2,卤素,杂环,酯基和酮基之间表现出优异的化学选择性。立体选择性表明反应机理可能涉及有机sa物种。