Silver-Catalyzed Regioselective Carbomagnesiation of Alkynes with Alkyl Halides and Grignard Reagents
作者:Nobuaki Kambe、Yuusuke Moriwaki、Yuuki Fujii、Takanori Iwasaki、Jun Terao
DOI:10.1021/ol2018664
日期:2011.9.2
A silver-catalyzed carbomagnesiation of alkynes with alkyl halides and Grignard reagents afforded alkenyl Grignard reagents regioselectively, where the alkyl group of the alkyl halide, but not that of the Grignard reagent, was introduced into the alkyne. Application to δ-haloalkylacetylenes yielded cyclopentanes or a tetrahydrofuran containing an exo-methylene substituent via 5-exo-dig cyclization
银的炔烃与烷基卤化物和格利雅试剂的银催化碳还原反应可选择性地提供烯基格利雅试剂,其中烷基卤的烷基而不是格利雅试剂的烷基被引入炔中。到δ-haloalkylacetylenes得到应用环戊烷或含四氢呋喃外型亚甲基取代基经由5外切挖环化。