Cu2O Nanocatalysts Immobilized on p(SBMA) for Synergistic CO2 Activation to Afford Esters and Heterocycles at Ambient Pressure.

Herein, we report a chemoselective insertion of CO2 into unsaturated alkyne substrates under ambient conditions, which is achieved over poly (sulfobetain methacrylate) (p(SBMA)) supported Cu2O nanocatalyst (Cu2O/p(SBMA)) and a series of 3a,4-dihydronaphtho[2,3-c]furan-1(3H)-ones, can be obtained in excellent yields. Cu2O/p(SBMA) presents high performance for environment pressure activation and interpolation of CO2 into unsaturated alkyne substrates. This provides an attainable and competent catalyst for interpolation of CO2 into aryl alkynes, and binding allylic chlorides through SN2 mechanism in order to produce efficient ester and lactone heterocycles that are supposed to have favorable utilizations. All in all, these findings signify practical methods of hybrid catalyst development for detailed alterations, including CO2 employment in a green and sustainable manner. [ABSTRACT FROM AUTHOR]