Synthesis of Fused Oxazolocoumarins from <i>o</i>‐Hydroxynitrocoumarins and Benzyl Alcohol Under Gold Nanoparticles or FeCl₃ Catalysis

Abstract

Synthesis of fused oxazolocoumarins has been achieved from the one‐pot tandem reactions of o ‐hydroxynitrocoumarins with benzyl alcohol in toluene under catalysis in a sealed tube at 150°C. The catalysis was performed by gold nanoparticles supported on TiO 2 (0.4 mol% Au) or FeCl 3 (5%) or silver nanoparticles supported on TiO 2 (1.7 mol% Ag).