Baylis-hillman reaction of arylaldehydes with phenyl vinyl ketone phenyl acrylate,and phenyl thiocarylate

摘要

In the baylis-Hillman reaction of aryl aldehydes with phenyl vinyl ketone,we found that the diadduct 4 was exclusively formed,and that the yield of 4 can reach 80precent with increasing amounts of phenyl vinyl ketone.But,for phenyl acrylate and phenyl thioacylate,only the normal Baylis-Hillman adduct was obtained.The substituent effects was also examined,and a plausible reaction mechanism was proposed for the formation of 4.