Synthesis of amidoalkyl naphthols by nano-Fe3O4 modified carbon nanotubes via a multicomponent strategy in the presence of microwaves

Fe3O4-CNTs composites are synthesized using simple chemical coprecipitation which is confirmed with XRD, VSM, TEM and EDS. Fe3O4-CNTs as a magnetically active catalyst catalyze one-pot multicomponent condensation of beta-naphthol with aromatic and aliphatic aldehydes and amide derivatives under solvent-free conditions and microwave-irradiation to afford the corresponding amidoalkyl naphthols in excellent yields. This catalyst provides clean conversion; greater selectivity and easy workup make this protocol practical and economically attractive. (C) 2013 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.