Suzuki–Miyaura cross-coupling of aryl chlorides catalyzed by palladium precatalysts of N/O-functionalized pyrazolyl ligands
作者:Alex John、Mobin M. Shaikh、Prasenjit Ghosh
DOI:10.1016/j.ica.2010.04.006
日期:2010.10
Abstract A series of palladium complexes, trans- [ 1 - ( R ) - pz 3 , 5 - Me 2 ] 2 PdCl2 R = CH2CONH(2,6-i-Pr2-C6H3) (1b) and 2-(OH)-C6H10 (2b)}, supported over N/O-functionalized pyrazole derived ligands effectively catalyzed the more challenging Suzuki–Miyaura cross-coupling of a variety of activated aryl chlorides with phenyl boronic acid in air in a mixed-aqueous medium (DMF:H2O, v/v = 9:1) in
摘要一系列钯配合物,反-[1-(R)-pz 3,5-Me 2] 2 PdCl2 R = CH2CONH(2,6-i-Pr2-C6H3)(1b)和2-(OH) -C6H10(2b)},在N / O-官能化的吡唑衍生的配体上得到支持,有效地催化了混合水介质(DMF: H2O,v / v = 9:1),产率中等至优异。除了通常遇到的Csp2-Csp2偶联以外,1b和2b预催化剂还催化了苄基氯与苯基硼酸相对较困难的Csp2-Csp3偶联。1b和2b配合物是通过各自N / O-官能化的吡唑基配体1a和2a与(COD)PdCl2的直接反应合成的,产率为62-66%。