A Convenient Preparation of Chalcogenoenynes from β-Bromovinyl Ketene Chalcogenoacetals
作者:Gilson Zeni、Marcelo Paulo Stracke、Elizeo Lissner、Antonio Luiz Braga
DOI:10.1055/s-2003-41499
日期:——
β-Bromovinyl ketene chalcogenoacetals have been synthesized stereoselectively via electrophilicaddition of the benzeneselenenyl bromide to substituted alkynes. The palladium-catalyzed cross-coupling reaction of β-bromovinyl ketene chalcogenoacetals with 1-alkynes gave the corresponding chalcogenoenynes in 62-85% yields.