Synthesis and characterization of a novel Bronsted acidic dicationic ionic liquid based on piperazine and its application in the one-pot synthesis of various xanthenes under solvent-free conditions

In this paper, an interesting Bronsted acidic dicationic ionic liquid based on piperazine was prepared via two-step synthesis. The structure of the dicationic ionic liquid (DIL) was confirmed with various techniques including Fourier transform infrared spectroscopy (FT-IR), Proton NMR (H-1 NMR), Carbon-13 NMR (C-13 NMR), mass spectroscopy (MS), acid-base titration as well as Hammett acidity function. Catalytic activity of this novel Bronsted acidic DIL was examined in the xanthene synthesis. High yield of product, short reaction time, easily recovery and reusing of the catalyst, and the absence of organic solvents are some of the merits of the developed procedure.

Automated summary

In this paper, an interesting Bronsted acidic dicationic ionic liquid based on piperazine was synthesized and its structure was confirmed using various techniques. The catalytic activity of this molecule in xanthene synthesis was examined, showing advantages such as high yield, short reaction time, easy recovery and reusing of the catalyst.