Chemical Engineering Journal, Vol.326, 1009-1019, 2017
CuCl2@Poly-IL catalyzed carboxylation of terminal alkynes through CO2 utilization
The carboxylation of terminal alkynes from CO2 is a most attractive route in green chemistry point of view. Herein, we synthesized a novel CuCl2@Poly-GLY(1-Vim)(3)(OMs)(3) catalyst and employed to the efficient carboxylation of terminal alkynes (phenyl carboxylate esters) by utilizing CO2 under 4 MPa, at 40 degrees C. In presence of catalyst, various terminal alkynes found to be easily reacting with CO2 and organic halide to affording a high yield of carboxylic ester. Moreover, CuCl2@Poly-GLY(1-vim)(3)(OMs)(3) catalyst is capable to obtain a high yield of corresponding carboxylic ester using various types organic halide. Furthermore, CuCl2@Poly-GLY(1-vim)(3)(OMs)(3) catalyst able to easily recover and reuse for four times without any obvious loss in catalytic activity. The catalytic reactivity of CuCl2@Poly-GLY(1-vim)(3)(OMs)(3) catalyst is explained on the basis of predicted mechanism. (C) 2017 Elsevier B.V. All rights reserved.