An Efficient Green Synthesis of 3-Amino-1H-chromenes Catalyzed by ZnO Nanoparticles Thin-film

A very simple and environmentally benign approach for the synthesis of 3-amino-1H-chromenes is described using ZnO nanoparticles thin-film as an efficient heterogeneous catalyst in green media, namely water. The mild reaction conditions, reusability of the catalyst, easy work-up and high yields of products make the present protocol sustainable and advantageous compared to conventional methods.KEYWORDS:  3-Amino-1H-chromene, aqueousmedium,hydrothermalsolution method, reusability of the catalyst,ZnOnanoparticles thin-film