Ionic liquid triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} as a novel, highly efficient and homogeneous catalyst for the synthesis of β-acetamido ketones, 1,8-dioxo-octahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes

► Introducing a novel ionic liquid as catalyst for organic transformations. ► Study the efficacy of the ionic liquid to catalyze three types of organic reactions. ► Study the efficiency of the ionic liquid to catalyze reactions in various conditions. ► Generality of the catalyst, high yields and short reaction times. ► Introducing efficient new methods for synthesis of β-acetamido ketones and xanthenes.