Potassium Carbonate‐Mediated Green and Efficient Synthesis of Imidazo[2,1‐b]‐1,3,4‐thiadiazoles Using PEG as Solvent

Polyethylene glycol (PEG) was found to be an inexpensive nontoxic and effective medium for the synthesis of imidazo[2,1‐b]‐1,3,4‐thiadiazoles in the presence of potassium carbonate as a green base in high yields. In addition, the solvent system can be recovered and reused, making this protocol economically and potentially viable.