新型铝配合物的合成及CO2/环氧丙烷环加成反应  

Synthesis of New Aluminum Complex and Its Catalytic Activity for Cycloaddition of CO2/Propylene Oxide

作　　者：张心心 张志超[1] ZHANG Xin-xin;ZHANG Zhi-chao(Shenyang University of Chemical Technology, Liaoning Shenyang 110142, China)

机构地区：[1]沈阳化工大学

出　　处：《辽宁化工》2019年第5期393-397,共5页Liaoning Chemical Industry

基　　金：国家自然科学基金面上项目(NSFC No.21674066)

摘　　要：采用3,5-二叔丁基水杨醛和2-氨基苯酚合成了水杨醛亚胺双酚配体,该配体同氯化二乙基铝在惰性气氛下进行反应,成功地制备了水杨醛亚胺铝配合物并用核磁共振对其结构进行了表征。合成的铝配合物与四丁基溴化铵(TBAB)组成的双组分催化剂,可以催化二氧化碳和环氧丙烷环加成反应,并且对环加成产物碳酸丙烯酯表现出高选择性。在n(环氧丙烷)/n(催化剂)=1000/1,[铝配合物]/[TBAB]=1/20,反应温度为80℃,二氧化碳压力为2 MPa时,10 h内环氧丙烷的转化率可以高达91.2%,环加成产物碳酸丙烯酯选择性大于99%,未发现聚合物生成。A new aluminum complex supported by tridentate bisphenolate ligand was synthesized from diethylaluminum chloride with salicylimine bisphenol proligand,and it was structurally characterized by NMR technique. The bicomponent catalyst of resultant aluminum complex and tetrabutylammonium bromide(TBAB) displayed medium activity toward the cycloaddition of carbon dioxide and propylene oxide, and it also displayed exclusive selectivity towards cycloaddition product propylene carbonate. 91.2% of propylene oxide was exclusively converted to the cyclic carbonate product in 10 h at 80 ℃ in the presence of CO2(2 MPa) with aluminum complex-to-TBAB under the molar ratio of 1/20 in neat propylene oxide. No polymeric products were discovered in the reaction mixture.

关 键 词：铝配合物 环氧丙烷 二氧化碳 环加成反应 碳酸丙烯酯 

分 类 号：O62731[理学—有机化学]