Regioselective synthesis of 5-aryl-2-oxazolidinones from carbon dioxide and aziridines using Br−Ph3+PPEG600P+Ph3Br− as an efficient, homogenous recyclable catalyst at ambient conditions

The polyethylene glycol functionalized phosphonium salt (Br−Ph3+PPEG600P+Ph3Br−) served as an efficient, homogeneous, and recyclable catalyst for coupling of CO2 with different aziridines under relatively mild reaction conditions.