Synthesis of 1,4-dienes by Pd(II)-catalyzed haloallylation of alkynes with allylic alcohols in ionic liquids

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• 作者：Jianxiao Li ; Shaorong Yang ; Wanqing Wu ; Chaorong Qi ; Zhongxian Deng ; Huanfeng Jiang
• 关键词：Alkynes ; Allyl alcohols ; Palladium-catalyzed ; 1 ; 4-Dienes ; Ionic liquids
• 刊名：Tetrahedron
• 出版年：18 February, 2014
• 年：2014
• 卷：70
• 期：7
• 页码：1516-1523
• 全文大小：967 K

文摘

A Pd-catalyzed haloallylation of alkynes with allyl alcohols in ionic liquids has been reported. Both chloroallylation and bromoallylation can be easily carried out with high selectivity. A variety of 1,4-dienes were formed in moderate to excellent yields. The reaction system of the Pd catalyst as well as the ionic liquid can be recycled for several times. And the ionic liquid acts as not only a solvent in the reaction, but also provides the excess halide ions to control Z/E selectivity and acts as a ligand inhibit the 尾-hydride elimination.