Robust zinc complexes bearing pyrrolidine based ligands as recyclable catalysts for the synthesis of cyclic carbonates from CO2 and epoxides

Identifier:  PC:2650

Handle: https://hdl.handle.net/20.500.11797/PC2650

Authors:  Claver, C.; Mercadé, E.; Zangrando, E.; Godard, C.

Abstract:
New zinc catalysts bearing the ligands 1-4 containing a pyrrolidine scaffold were synthesized and successfully tested in the coupling of CO2 with terminal and internal epoxides, providing excellent activity and total selectivity to the corresponding cyclic carbonates, even for challenging substrates such as cyclohexene oxide, trans-1,2-epoxybutane and methyl epoxioleate. The Zn-3/TBAI catalytic system revealed as the most active of the series and its robustness was demonstrated through TON values up to 1840 for propylene oxide. The recycling of this catalytic system was also performed up to 5 times without relevant loss of activity using this substrate