An efficient method for the synthesis of dihydropyrimidines using Brønsted acidic ionic liquid: A solvent and heating free reaction

A simple approach for the synthesis of dihydropyrimidinones from aldehydes with β-ketoester and urea using BAILs as a catalyst at room temperature and solvent-free condition. This method shows high yields and simple separation techniques. © 2020 Author(s).S. Santra is thankful to the Russian Science Foundation – Russia (Ref. # 18-73-00301) for funding