在离子液体BMImPF6中,用不同的钯催化剂和Lewis酸三氟甲磺酸铜Cu(OTf)2共催化苯乙烯二聚反应,发现用Pd(OAc)2/Cu(OTf)2作催化剂,Pd/Cu物质的量之比为1～4时,可高产率高选择性地获得苯乙烯二聚产物1,3-二苯基-1-丁烯.BMImPF6对催化剂有较好的溶解性,可固定催化剂体系,使催化剂有效地与产品分离.同时,α-甲基苯乙烯的二聚反应表明,室温下不发生反应,提高温度有利于反应进行. In the ionic liquid BMImPF6, dimerization of styrene with different palladium catalysts and Cu (OTf) 2 Lewis acid copper triflate was carried out. It was found that Pd (OAc) 2 / Cu (OTf) / Cu substance is 1 to 4, the 1,3-diphenyl-1-butene, which is a dimerized product of styrene, can be obtained with high yield and selectivity, and the BMImPF6 has good solubility in the catalyst. The catalyst system is immobilized so that the catalyst can be effectively separated from the product, while the dimerization of α-methylstyrene shows that no reaction occurs at room temperature, and the increase of temperature is favorable for the reaction.