Cp2TiCl2-Catalyzed Grignard exchange reactions with acetylenes. A convenient method for preparation of E-alkenyl Grignard reagents
作者:Fumie Sato、Hiroaki Ishikawa、Masao Sato
DOI:10.1016/0040-4039(81)80047-0
日期:1981.1
E-alkenyl Grignardreagents selectively and in almost quantitative yields. The regiochemistry of this hydromagnesation reaction is high for alkylarylacetylenes and silylacetylenes giving E-ArC(MgBr)CHR from alkylarylacetylenes, E-ArC(MgBr)CH(SiMe3) from arylsilylacetylenes, and ECHRC(MgBr)(SiMe3) from alkylsilylacetylenes, respectively. Thanks to the high reactivity of the Grignardreagent, the present