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.
Palladium-Catalyzed Stereoselective Synthesis of (E,E)-1-Arylselenobutadienes
作者:Xian Huang、Liu-Sheng Zhu
DOI:10.1055/s-1996-4362
日期:1996.10
(E)-Vinylic zirconium(IV) complexes, readily obtainable via hydrozirconation of alk-1-ynes, react with (E)-1-halo-2-arylselenoethylenes in the presence of catalytic amounts of tetrakis(triphenylphosphane)palladium to produce (E,E)-1-arylselenobutadienes in high yields.