Nickel-catalyzed cross-coupling reaction of acetylenic sulfones with alkynyl Grignard reagents: a facile method for the preparation of unsymmetrical 1,3-diynes
作者:Kuang Fang、Meihua Xie、Zhannan Zhang、Peng Ning、Guanying Shu
DOI:10.1016/j.tetlet.2013.05.049
日期:2013.7
The cross-coupling reaction of acetylenic sulfones with acetylenic Grignard reagents was realized by using Ni(acac)2 as catalyst to afford unsymmetrical 1,3-diynes under mild conditions without homocoupling byproducts. By using this method, 1,4-diaryl-1,3-diynes could be obtained in moderate to good yields (59–83%), whereas, the yields for alkyl substituted 1,3-diynes are lower (30–54%).
乙炔砜与炔属格氏试剂的交叉偶联反应是通过使用Ni(acac)2作为催化剂在温和条件下提供不对称的1,3-二炔而没有均偶联副产物来实现的。通过这种方法,可以以中等至良好的收率(59–83%)获得1,4-二芳基-1,3-二炔,而烷基取代的1,3-二炔的收率则较低(30–54%)。 )。