Synthesis of a New Series of 4H-benzo[h]chromenes by a Multicomponent Reaction under Solvent-Free Microwave Conditions

Abstract

<em><span>Multicomponent </span><span>condensation of 1-naphthol, malononitrile, and arylglyoxals </span><span>in the presence of Mg-Al hydrotalcite under solvent-free MicroWave (MW) conditions</span><span> gave a new series </span><span>of </span><span>2-amino-4-aroyl-4H-benzo[h]chromene-3-carbonitriles in high yields (70-89%). </span><span>The structure of all products was elucidated by their FT-IR, ¹H-NMR, ¹³C-NMR spectral data and microanalysis.</span></em>