Chemical fixation of CO2 has received much attention because CO2 is the most inexpensive and renewable carbon
resource from the viewpoint of green chemistry and atom economy. The kinetic and thermodynamic stability of CO2
molecule presents significant challenges in designing efficient chemical transformations based on this potential feedstock.
Currently, cyclic carbonates and polycarbonates are both valuable products, and the coupling of CO2 and epoxides is one
of the most promising and eco-friendly methods for chemical conversion of CO2 into cyclic carbonates and/or polycarbonates.
In this review, we will mainly discuss the synthesis of polycarbonates or cyclic carbonates catalyzed by metalsalen
complexes through adjusting the architecture of the ligands and optimizing reaction conditions, such as temperature,
pressure, co-catalysts, epoxide concentration. Furthermore, the recent progress for the synthesis of cyclic carbonates via
the coupling reactions of epoxides and CO2 mediated by both homogeneous and heterogeneous catalysts is particularly