Copper(II) Acetate/Oxygen-Mediated Nucleophilic Addition and Intramolecular C-H Activation/C-N or C-C Bond Formation: One-Pot Synthesis of Benzimidazoles or Quinazolines

Diarylcarbodiimides or benzylphenylcarbodiimides are converted to 1,2-disubstituted benzimidazoles or 1,2-disustituted quinazolines via addition/intramolecular C-H bond activation/C-N or C-C bond forming reaction using copper(II) acetate/oxygen [Cu(OAc)(2)/O-2] as the oxidant at 100 degrees C in one-pot cascade procedure.