Stereoselective synthesis of enynes by nickel-catalyzed cross-coupling of divinylic chalcogenides with alkynes

CC Silveira, AL Braga, AS Vieira…

Index: Silveira, Claudio C.; Braga, Antonio L.; Vieira, Adriano S.; Zeni, Gilson Journal of Organic Chemistry, 2003 , vol. 68, # 2 p. 662 - 665

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Citation Number: 87

Abstract

Recently, we accomplished the stereospecific formation of (Z)-enyne systems by the palladium-catalyzed cross-coupling reaction of (Z,Z)-divinyl tellurides with 1-alkynes. 19 Although, in all cases, an excess of alkyne has been used, the transfer of only one vinylic group was observed. Divinylic selenides were totally inert under these coupling conditions, employing several different palladium catalysts, and the starting materials have usually been ...