Facile Stereoselective Synthesis of (<i>E</i>)-1-Arylseleno-Substituted 1,3-Enynes and Their Applications in Synthesis of (<i>E</i>)-Enediynes
作者:Xiaoniu Fang、Minhua Jiang、Ronghua Hu、Mingzhong Cai
DOI:10.1080/00397910802323064
日期:2008.11.3
Abstract (E)-1-Iodo-2-arylselenoethylenes 1 underwent the Sonogashira coupling reactions with terminal alkynes 2 to afford (E)-1-arylseleno-substituted 1,3-enynes 3 in high yields. (E)-1-Arylseleno-substituted 1,3-enynes 3 were coupled with alkynylmagnesium bromides 4 in the presence of a catalytic amount of NiCl2(PPh3)2 to give stereoselectively (E)-enediynes 5 in good yields.
摘要 (E)-1-Iodo-2-芳基硒乙烯 1 与末端炔烃 2 进行 Sonogashira 偶联反应,以高产率得到 (E)-1-芳基硒取代的 1,3-烯炔 3。在催化量的 NiCl2(PPh3)2 存在下,(E)-1-Arylseleno 取代的 1,3-烯炔 3 与炔基溴化镁 4 偶联,以良好的收率得到立体选择性 (E)-烯二炔 5。