Stereoselective Synthesis of Vinyl Sulfones by the Stille Coupling of (E)-α-Stannylvinyl Sulfones with Aryl Halides
作者:Ronghua Hu、Yan Yu、Mingzhong Cai
DOI:10.3184/030823408x360319
日期:2008.10
hydrostannylation of acetylenic sulfones (R–C≡C–SO2Ar) in benzene at room temperature gives stereoselectively (E)-α-stannylvinyl sulfones in good to high yields. (E)-α-Stannylvinyl sulfones are difunctional group reagents which undergo Stille coupling reaction with aryl halides in the presence of Pd(PPh3)4 and CuI co-catalyst to afford stereoselectively (Z)-1,2-disubstituted vinylsulfones in good yields.
在室温下,钯催化乙炔砜(R–C≡C–SO2Ar)在苯中的氢化甲硅烷基化反应可以立体选择性地得到(E)-α-甲锡乙烯基砜,收率很高。(E)-α-甲锡基乙烯基砜是双官能团试剂,在 Pd(PPh3)4 和 CuI 助催化剂存在下,它与芳基卤化物发生 Stille 偶联反应,得到立体选择性良好的 (Z)-1,2-二取代乙烯基砜产量。