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 electrophilic addition 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.
β-溴乙烯基乙烯酮硫属化合物缩醛是通过苯硒基溴化物与取代炔烃的亲电加成立体选择性合成的。钯催化的 β-溴乙烯基乙烯酮硫属元素缩醛与 1-炔烃的交叉偶联反应以 62-85% 的产率得到相应的硫属元素炔。