Preparation of Vinylcyclopropanes by Sodium Mediated Reductive Isomerization of Methylenecyclopropanes
作者:Karel Le Jeune、Sabine Chevallier-Michaud、David Gatineau、Laurent Giordano、Alphonse Tenaglia、Hervé Clavier
DOI:10.1021/acs.joc.5b01205
日期:2015.9.4
We disclosed therein a new reaction of reductive isomerization of methylenecyclopropanes (MCPs) to vinylcyclopropanes (VCPs). On treatment with sodium metal in liquid ammonia, MCPs bearing a C–O bond at allylic position undergo both a reductive cleavage of the C–O bond and an isomerization of the C–C double bond giving rise to VCPs. The scope of the reductive isomerization was investigated and showed