We report herein general conditions for a zinc-mediated anionic cyclization of unstabilized ketone enolates. This anionic cyclization allows access to various carbocyclic architectures by utilizing abundant ketones and unactivated alkenes as precursors. The transformation is enabled by the use of Zn(TMP)2 as base and Zn(OTf)2 as an additive. The resulting alkylzinc species can be intercepted by electrophiles
我们在此报告了不稳定的酮烯酸酯的
锌介导的阴离子环化的一般条件。通过利用丰富的酮和未活化的烯烃作为前体,这种阴离子环化反应可以进入各种碳环结构。通过使用Zn(
TMP)2作为碱和Zn(OTf)2作为添加剂可以实现转化。最终的烷基
锌物质可被亲电体拦截,形成串联的C–X和C–O键。