【摘要】 在[BMIM][TPPMS]离子型膦配体和碱性离子液体[BMIM][OAc]组成的功能离子液体复合体系中,PdCl2(CH3CN)2可以有效地催化溴苯和丙烯酸乙酯的交叉偶联(Heck)反应,产物肉桂酸乙酯(反式)的收率达到60%.锚定在功能离子液体复合体系中的Pd催化剂循环使用11次后仍保持良好的活性和稳定性.该催化剂体系的良好活性和稳定性可归因于三个方面[BMIM][TPPMS]和[BMIM][OAc]间的协同配位效应;以[BMIM][OAc]作为Heck反应的缚酸剂,避免了无机盐粘稠物的形成;生成的副产物[BMIM]Br可以有效溶解钯黑,避免了钯黑的析出.该离子液体催化体系对不同底物的Heck偶联反应也表现出良好的普适性.更多还原

【Abstract】 In the functionalized ionic liquid (FIL) system of[BMIM][TPPMS] and[BMIM][OAc] , PdCl2(CH3CN)2 efficiently coupled bromobenzene and ethyl acrylate to ethyl cinnamate with a yield of 60% (Heck reaction) and without the activity loss even after eleven recycling uses. The favourable impacts of this ionic liquid system on the activity and the stability were explained in terms of synergic ligand effects of[BMIM][TPPMS] and[BMIM][OAc] , no formation of sodium or ammonium bromides as slurry mixtures by using [BMIM][OAc] as base, and the positive effect of[BMIM]Br by forbidding the formation of palladium black. The generality of this FIL system to the substrates with different electronical effects also gave out the pleasing results.更多还原