Palladium-Catalyzed Dimerization Disilylation of 1,3-Butadiene with Chlorosilanes
作者:Jun Terao、Akihiro Oda、Nobuaki Kambe
DOI:10.1021/ol048751j
日期:2004.9.1
[reaction: see text] 1,3-Butadiene reacted with chlorosilanes and Grignard reagents at 20 degrees C in the presence of a catalytic amount of Pd(acac)(2) to give disilylated dimers 2 regioselectively, which have two silyl groups (R(3)Si) at the 3- and 8-positions of a 1,6-octadiene skeleton. When phenyl- or allyl-substituted chlorosilanes were used, coupling product was obtained stereo- as well as regioselectively
[反应:请参见文本] 1,3-丁二烯在催化量的Pd(acac)(2)存在下于20摄氏度下与氯硅烷和格氏试剂反应,从而选择性地生成具有两个甲硅烷基(R (3)Si)在1,6-辛二烯骨架的3和8位上。当使用苯基或烯丙基取代的氯硅烷时,立体和区域选择性地获得偶联产物,仅产生(E)-烯烃。有人提出,钯酸盐络合物在两个C-Si键形成过程中都起着重要作用。