One-Pot Synthesis Of 9-Aryl-1,8-Dioxo-1,2,3,4,6,7,8-Octahydroxanthenes Catalyzed By P-Dodecylbenzene Sulfonic Acid In Aqueous Media

An efficient and convenient 'approach to the synthesis of 9-aryl-1,8-dioxo-1,2,3,4,6,7,8-octahydro-xanthenes using p-dodecylbenzene sulfonic acid (DBSA) as the catalyst (20 mol %) in aqueous media is described. This method provides several advantages such as environment friendly, high yields and simple work-up procedure. In addition, water was chosen as a green solvent.