PEG-DIL-based MnCl42-: A novel phase transfer catalyst for nucleophilic substitution reactions of benzyl halides

摘要

Poly(ethylene glycol) dicationic ionic liquid-based MnCl42- was prepared by nucleophilic substitution of poly(ethylene glycol) dichloride with methylimidazole followed by reaction with MnCl2. The structural properties of the catalyst were systematically investigated using Fourier transform infrared, UV-visible and Raman spectra and thermogravimetric analysis. The application of this catalyst allows the synthesis of a variety of benzyl thiocyanates and azides in high yield under reflux conditions in water. The main advantages of this method are its easy nature, rapidity, environmental benignity and high yields.