Abstract

A highly efficient three-component one step system for the synthesis of 2-amino-4H-chromens is developed. Excellent yields were obtained
simply by mixing malononitrile, aromatic aldehyde and α-napthol in lemon juice as a catalyst of natural origin and solvent, avoiding using
hazardous organic solvents. The main advantages of this method are its green method character, short reaction time and simple workup
procedures and the lack of using any metal containing catalysts

Key words: Green synthesis; benzaldehyde; malononitrile; catalyst of natural origin; ultrasound; 2-amino-4H-chromenes.