Nickel-catalyzed dimerization coupling reactions of vinyl Grignard reagents with 3, 4-membered cyclic ethers and chlorosilanes
作者:Yuuki Fujii、Jun Terao、Hiroyasu Watabe、Hiroyuki Watanabe、Nobuaki Kambe
DOI:10.1016/j.tet.2007.04.013
日期:2007.7
Vinyl Grignard reagents reacted with cyclic ethers in the presence of a nickel catalyst giving rise to 2:1 coupling products 1 regioselectively. When chlorosilanes were used instead of cyclic ethers, 2:2 component coupling products 6 were obtained. A plausible reaction pathway via 1,3-butadiene–nickel complex and (2-butene-1,4-diyl)magnesium was proposed.
在镍催化剂的存在下,乙烯基格氏试剂与环醚反应,从而选择性地产生2:1的偶合产物1。当使用氯硅烷代替环醚时,获得了2:2的组分偶联产物6。提出了通过1,3-丁二烯-镍络合物和(2-丁烯-1,4-二基)镁的合理反应途径。