Palladium(II)-catalyzed coupling of allenoic acids and α,β-unsaturated carbonyl compounds through tandem intramolecular oxypalladation and conjugate addition reactions
作者:Guosheng Liu、Xiyan Lu
DOI:10.1016/s0040-4039(02)02507-8
日期:2003.1
A regioselective divalent palladium-catalyzed tandem coupling reaction of allenoic acids with α,β-unsaturated carbonylcompounds was developed. The reaction involves intramolecular oxypalladation of an allene, followed by insertion of the α,β-unsaturated carbonylcompound and protonolysis of the CPd bond to regenerate the Pd(II) species in the presence of excess halide ions. Functionalized lactones