Table 2.

Synthesis of various oxazolidinones from CO₂ and aziridines with catalyst 1^a)

Entry	Substrate	Conv.b) [%]	Yieldb) [%]	Regio‐selc)
1		>99	>99	98:2
2		95	93	97:3
3		93	92	98:2
4		>99	88	93:7
5		>99	92	98:2

^a)Reaction conditions: aziridine (2.0 mmol), solvent‐free, 80 mg catalyst 1 loading (based on metal center, about 10 mol%), TBAB (32.4 mg, 0.1 mmol), CO₂ (2.0 MPa), 12h;

^b)Determined by ¹H NMR using 1,3,5‐trimethoxybenzene as an internal standard;

^c)Molar ratio of 2 to 3.