▎ 摘　　要

An exceptionally productive and sustainable procedure is described in this paper to fabricate 1-(benzothiazolylamino) methyl-2-naphthols using a novel green nanocomposite of chitosan and diethylenetriamine-modified graphene oxide, supported methanesulfonic acid (Ch@GO-DETA.MSA.). For the synthesis of the nanocomposite, maleic anhydride was first attached to chitosan, and then, graphene oxide was modified by diethylenetriamine (GO@DETA). Subsequently, nanocomposite was prepared from the reaction of chitosan-g-maleic anhydride and GO@DETA. Finally, methane sulfonic acid was added to the nanocomposite to afford Ch@GO-DETA.MSA. Structural properties of the nanocomposite were explored through various techniques including X-ray diffraction (XRD), thermal gravimetric analysis (TGA), FTIR spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). 1-(Benzothiazolylamino) methyl-2-naphthols were efficiently prepared in high to excellent yields through a multicomponent reaction of 2-aminobenzothiazole, aryl aldehydes, and 2-naphthol using Ch@GO-DETA.MSA. nanocomposite under solvent-free conditions. The proposed protocol exhibited superiority over several published protocols due to its nontoxicity and eco-friendly, catalytic ability, short reaction times, generality, efficiency, solvent-free condition, and simple workup.