Reactions of Lithium Silylcuprates with Pyrazolium and Indazolium Salts
作者:Ana M. González-Nogal、Mariola Calle、Purificación Cuadrado
DOI:10.1002/ejoc.200700742
日期:2007.12
Although pyrazoliumsalts have been shown to be unreactive toward lithium carbocuprates, these substrates were opened by lithium silylcuprate reagents to give versatile N-silylated β-enaminoimines stabilized by coordination of the silyl group with both nitrogen atoms. In contrast, the behaviour of indazolium salts on treatment with the same reagents is more complex. Depending on the substitution patterns