Palladium-Catalyzed Cross-Coupling Reactions of 1,2-Diiodoalkenes with Terminal Alkynes: Selective Synthesis of Unsymmetrical Buta-1,3-diynes and 2-Ethynylbenzofurans
作者:Jin-Heng Li、Yun Liang、Li-Ming Tao、Yue-Hua Zhang
DOI:10.1055/s-0028-1083251
日期:2008.12
for the preparation of unsymmetricalbuta-1,3-diynes and 2-ethynylbenzofurans. In the presence of palladium(II)acetate and copper(I) iodide, unsymmetrical buta-1,3-diynes wereselectively obtained in moderate to good yields. Moreover, 2-ethynylbenzofuranswere obtained in one pot from the reaction of 2-ethynylphenol with( E)-1,2-diiodoalkenes, palladium(II)acetate, and copper(I) iodide by simple heating
(E)-1,2-二碘烯烃被发现是制备不对称albuta-1,3-diynes 和2-ethynylbenzofurans 的有效构件。在乙酸钯(II)和碘化铜(I)存在下,以中等至良好的收率选择性地获得不对称的 1,3-丁二炔。此外,2-乙炔基苯酚与(E)-1,2-二碘代烯烃、乙酸钯(II)和碘化铜(I)通过简单加热反应在一锅中得到2-乙炔基苯并呋喃。