乙酰乙酸乙酯金属配合物催化丁二酸二甲酯和碳酸乙烯酯的耦合反应

研究了乙酰乙酸乙酯金属配合物催化碳酸乙烯酯(EC)和丁二酸二甲酯(DMSu)同时合成聚丁二酸乙二醇酯(PES)预聚体和碳酸二甲酯(DMC)耦合反应新工艺。结果表明,以乙酰乙酸乙酯锌为催化剂,反应温度205～215℃,n(乙酰乙酸乙酯锌)/n(EC+DMSu)=0.001,n(EC)/n(DMSu)=4,反应时间1 h时,DMC收率为52.3%,PES的特性黏度为0.117 4 dL/g。

Coupling reaction of Dimethyl Succinate and Ethylene Carbonate over metal ethyl acetoacetate complexs

A new technology of coupling reaction was studied,by which the simultaneous synthesis of poly(ethylene glycol succinate) oligomers and dimethyl carbonate(DMC) was realized by the coupling reaction of ethylene carbonate(EC) and dimethyl succinate(DMSu) over various metal ethyl acetoacetate complexes.Zn(EAA)2 as catalyst has the highest catalytic activity for the coupling reaction.The preferable reaction conditions were as follows:reaction temperature 205-215 ℃,molar ratio of EC to DMSu 4,molar ratio of catalyst to the total mass of EC and DMSu 0.001,reaction time 1 h.Under such conditions,the yield of DMC was 52.3%,and the intrinsic viscosity η] of poly(ethylene glycol succinate) oligomer was 0.117 4 dL/g.