Novel catalyst compositions, characterized in that they are based upon
a) a palladium compound,
b) an anion of an acid with a pKa of less than 2, with the proviso that the acid is not a hydrohalogenic acid, and
c) a compound in which there occur one phosphorus atom and one or more nitrogen atoms which atoms bear no hydrogen, and in which compound each one of the nitrogen atoms is connected to the phosphorus atom by an organic bridging group which contains at least one carbon atom in the bridge.
新型催化剂组合物,其特征在于它们基于
a)
钯化合物
b) 一种 pKa 小于 2 的酸的阴离子,但该酸不是氢卤酸,以及
c) 一种化合物,其中有一个
磷原子和一个或多个氮原子,氮原子中不含氢原子,该化合物中的每个氮原子都通过一个有机桥基与
磷原子相连,该桥基中至少含有一个碳原子。