One-Pot Regioselective Synthesis Of Diazaspiro [5.5]Undecane-1,5-Dione-9-Thione Derivatives Catalyzed By Reusable 1-Methyleviidazolium Trifluoromethylsulfonate Under Solvent-Free Conditions

A green and environmentally benign Biginelli-like synthesis of 2,4-dioxa-8,10-diazaspiro[5.5]undecane-1,5-dione-9-thione derivatives by one-pot three-component reaction of aromatic aldehydes with thiourea and 1,3-dioxane-4,6-dione catalyzed by reusable 1-methylimidazolium trifluoromethylsulfonate under solvent-free conditions is described.