Synthesis of cyclic carbonates catalyzed by Py-C₁₂ in the presence of g-C₃N₄^a.

Entry	Epoxides	Product	Yieldb (%)
1			95.2
2			95.8
3			94.9
4			94.8
5c			96.5
6c			93.5
7d			94.6

^aReaction conditions: epoxides (10 mmol), g-C₃N₄ (15 mg), Py-C₁₂ (23.8 mg), CO₂ (0.1 MPa), 80 °C, 16 h.

^bDetected by ¹H-NMR.

^c32 h.

^d48 h.