Ultrasound mediation for one-pot multi-component synthesis of amidoalkyl naphthols using new magnetic nanoparticles modified by ionic liquids

•MNPs-IL-OAc was synthesized as novel magnetically catalyst.•We reported a heterogeneous catalytic system for the synthesis of amidoalkyl naphthols.•The reaction carried out by sonication with better reaction times and yields than conventional methods.•The magnetite nanocatalyst is stable under ultrasound irradiation.

The ionic liquid 1-methyl-3-(3-trimethoxysilylpropyl) imidazolium acetate was immobilized on the Fe3O4 nanoparticles (MNPs-IL-OAc) and used as an efficient new heterogeneous nanocatalyst for the one-pot multi-component synthesis of 1-amidoalkyl-2-naphthols under ultrasound irradiation. The advantages of present combined method are the use of a low scale catalyst, easier work-up procedure, waste-free, green and efficient synthetic entry to excellent yield of products in a high reusability and a short reaction time.