Easy access to 5-(E)-alkynylidene tetrahydro-2 furanones by a palladium catalyzed process
作者:Didier Bouyssi、Jacques Gore、Geneviéve Balme
DOI:10.1016/s0040-4039(00)78865-4
日期:1992.5
Biologically active ynenol lactones 1 are stereospecifically obtained when gamma-acetylenic carboxylates are reacted with 1-bromo 1-alkynes in the presence of a palladium(0)-phosphine complex. The reaction is effective only with the potassium carboxylate and the nature of the phosphine is essential for the cyclisation process.