A convenient synthesis of 9-aryl-3,3,6,6-tetramethyl-1,2,3,4,5,6,7,8,9,10-decahydroacridine-1,8-diones under microwave irradiation without solvent

A convenient synthetic method for the title compounds are described. Heating 1, 2 and 3 under microwave irradiation for 3-5 min to afford 4. The structure of the compound 4c has been thoroughly studied by X-ray crystallographic analysis.