Copper-Catalyzed One-Pot Synthesis of 2,3-Dihydroquinazolin-4(1 H )-ones from 2-Nitrobenzonitriles and Carbonyl Compounds Mediated by Diboronic Acid in Methanol-Water

摘要

A copper-catalyzed one-pot synthesis of 2,3-dihydroquinazolin-4(1 H )-ones with diboronic acid as a reductant in an aqueous medium is described. Various 2,3-dihydroquinazolin-4(1 H )-ones were prepared with good functional-group tolerance in good yields under mild conditions from readily available 2-nitrobenzonitriles and various carbonyl compounds.