Synthesis of 1H,7H,12bH-Pyrano[3′,4′: 5,6]pyrano[3,4-c][1]benzopyran-1-one via Domino Knoevenagel/Hetero-DielsAlder Reaction with Theoretical Investigations

CuI nanoparticles mediated expeditious synthesis of 2-substituted benzimidazoles using molecular oxygen as the oxidant

2-Substituted benzimidazoles from o-diaminobenzenes and aldehydes using CuI nanoparticles as a heterogeneous nano-catalyst and O₂ as an oxidant were synthesised in excellent yields.