名称:
                                Easy access to 5-(E)-alkynylidene tetrahydro-2 furanones by a palladium catalyzed process
                             
                            
                                摘要:
                                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.
                             
                                                            
                                    DOI:
                                    10.1016/s0040-4039(00)78865-4