Magnetic Ionic Liquid Functionalized Sulfonic Acid: a Green and Efficient Catalyst for the One-pot Synthesis of 1- Amidoalkyl-2-Naphthols

In this study, a novel acidic magnetic dicationic ionic liquid was prepared in three steps to serve as agreen catalyst in organic synthesis. the newly synthesized catalyst was characterized by ft-ir,uv- vis, and vsm analysis. additionally, the decomposition steps and thermal stability of the catalyst were investigated by thermal analysis techniques (tga/dsc). the synthesized acidicmagnetic dicationic ion liquid has a magnetization of about 0.3 emu/g, which is less than fecl3 (o.7 emu.g- 1). moreover, the catalytic activity of this acidic ionic liquid was successfully tested in the straight forward one-pot synthesis of 1-amidoalkyl-2-naphthol derivatives via three-componentreaction between β-naphthol, aldehyde, and acetamide or benzamide under solvent-free conditions.the pure products were determined by analyzing their physical data (melting points, ir) thismethod has several advantages such as easy work-up, not using a volatile organic solvent, highyield, and high atom economy. the catalyst can be reused and recovered without losing activity.