Formation of a nanorod shaped ionogel and its high catalytic activity for one-pot synthesis of benzothiazoles

Abstract

An ionogel was synthesized through the confinement of 1,3,5-trimethyl pyrazolium chloride as an ionic liquid in a silica-gel matrix through a sol–gel process, and its catalytic activity was compared with a silica supported ionic liquid for the synthesis of benzothiazoles using 2-aminothiophenol and aldehydes/ketones. The reaction between 3-methoxyacetophenone and 2-aminothiophenol produced 2-(3-methoxyphenyl)benzothiazole, and its structure was determined using X-ray crystallography. The ionogel was characterized with SEM, TEM, FTIR and TGA.