Palladium-Free Synthesis of Conjugated Enynes by Direct Olefination of Terminal Alkynes Using Vinyl Bromides
作者:Yunyun Liu、Jianguo Yang、Weiliang Bao
DOI:10.1002/ejoc.200900954
日期:2009.11
A series of conjugatedenynes were successfully synthesized by the direct copper-catalyzed coupling reaction of vinylbromides and alkynes. The reaction proceeds smoothly in DMF at 110 °C to give the corresponding products in good to excellent yields. The protocol is tolerant to a broad range of functional groups on the substrates. Moreover, the products were furnished as specific E isomers, as the