Synlett

A convenient preparation of chalcogenoenynes from β-bromovinyl ketene chalcogenoacetals

G Zeni, MP Stracke, E Lissner, AL Braga

Index: Zeni, Gilson; Stracke, Marcelo Paulo; Lissner, Elizeo; Braga, Antonio Luiz Synlett, 2003 , # 12 p. 1880 - 1882

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Abstract

Abstract 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