Tetraphosphine/palladium-catalysed Suzuki cross-coupling with sterically hindered aryl bromides and arylboronic acids
作者:Marie Feuerstein、Henri Doucet、Maurice Santelli
DOI:10.1016/s0040-4039(01)01360-0
日期:2001.9
omethyl)cyclopentane/[PdCl(C3H5)]2 system efficiently catalyses the Suzuki cross-coupling of sterically hindered substrates. Very high turnover numbers can be obtained for the coupling of sterically hindered aryl bromides with benzeneboronic acid or for the coupling of bromobenzene with sterically hindered arylboronic acids. On the other hand the formation of tri-ortho-substituted biaryl adducts requires
顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷/ [PdCl(C 3 H 5)] 2系统有效催化空间受阻底物的Suzuki交叉偶联。对于位阻芳基溴化物与苯硼酸的偶联或对于溴苯与位阻芳基硼酸的偶联,可以获得非常高的转换数。另一方面,三邻位取代的联芳基加合物的形成需要更高的催化剂负载量。