Carbon dioxide (CO2) being a renewable reagent has drawn significant attention in replacing the toxic C1 feedstock for the synthesis of commercially important chemicals like oxazolidinones, polyurethanes, cyclic carbonates and polycarbonates. Cyclic carbonates can be used as degradable organic solvents, intermediates for polycarbonate synthesis, electrolytic material for lithium ion batteries etc. In this work, we present the direct one-pot conversion of alkene to cyclic carbonate using a redox active manganese complex. Manganese amido-amine complex and tetrabutylammonium bromide were found to form an efficient catalytic system for the epoxidation of alkene and further cycloaddition of CO2, using tertiary butyl hydrogen peroxide as the oxidant. Cyclic carbonates of various alkenes have been successfully synthesized at relatively low temperature (60 oC) and low CO2 pressure (100 psi). Activity of the catalyst was optimized by studying various parameters like temperature, CO2 pressure and oxidant concentrations.

Use of manganese amido-amine complex for the conversion of alkene to cyclic carbonate

244th National Meeting (2012)

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