fig4
Figure 4. Substrate scope for aerobic synthesis of 2-substituted benzoxazoles, benzothiazoles and benzimidazoles. 2 mmol aminophenol, 2.2 mmol benzaldehyde, 10 mL xylene, 120 mg catalyst ( NND900), 140 °C, 1 atm O2; Isolated yield. The structures of all products were identified by the GC-MS [Supplementary Figure 5].
