A new preparation of methylenecyclopropanes utilizing trimethylsilyldiazomethane
作者:Atsushi Sakai、Toyohiko Aoyama、Takayuki Shioiri
DOI:10.1016/s0040-4020(98)01176-4
日期:1999.3
Reactions of aliphatic ketones with lithium trimethylsilyl-diazomethane in the presence of excess olefins afforded methylenecyclopropanes in moderate to good yields. The multiplicity of the alkylidene carbene intermediate in the reacting state has been revealed to be a singlet.