Pd-catalysed direct oxidative carbonylation of allylic C-H bonds with carbon monoxide was first described. This new procedure shows that the inherent requirement for a leaving group in the Tsuji-Trost palladium-catalysed allylic carbonylation can be lifted, which provides a new route for accessing more synthetically useful beta-enoic acid esters with high regioselectivity.
3-Aryl-3-butenoic Acids and Their Esters: Practical Synthesis from Diketene by the Palladium-Catalyzed Grignard Coupling Reaction and Application as Monomers for the Radical Copolymerization with Styrene
作者:Kenji Itoh、Tatsumi Harada、Hideo Nagashima
DOI:10.1246/bcsj.64.3746
日期:1991.12
equimolar amount of zinc chloride followed by the reaction with diketene in the presence of a catalytic amount of PdCl2(PPh3)2 provided an improved synthetic method for 3-aryl-3-butenoic acids in a large scale. Application as a monomer for the substituted polystyrenes is exemplified by the copolymerization of methyl 3-phenyl-3-butenoate with styrene.