Multicomponent reaction for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones using isatoic anhydride, aldehydes and NH4OAc catalyzed by SnCl2•2H2O under solvent-free conditions

Nowadays, Quinazolinone derivatives are well-recognized as valuable scaffolds in the drug discovery. In this manuscript an improved multicomponent process for the chemical synthesis of 2,3-dihydroquinazolin-4(1H)-one derivatives is described. Isatoic anhydride and aromatic aldehydes with ammonium acetate have been subjected to a three-component reaction under solvent-free conditions and catalysis of SnCl2 dihydrate at 110 degrees C. All of the products are known and characterized using melting point, (HNMR)-H-1 and infrared spectra (FT-IR), and also can be compared to the trusty references. The present methodology offers several advantages, such as cost efficiency, easy experimental workup procedure, mild reaction conditions, short reaction time, good to high yields and synthesis of wide range of products.