A NEW AND EFFICIENT METHOD FOR THE SYNTHESIS OF 3,3,6,6-TETRA-METHYL-9-ARYL-DECAHYDRO- ACRIDINE-1,8-DIONE DERIVATIVES WAS DEVELOPED VIA ONE POT THREE COMPONENT REACTION OF CYCLOHEXANE-1,3- DIONE, AROMATIC ALDEHYDES AND AMMONIUM ACETATE IN THE PRESENCE OF KEGGIN NANO CATALYST IN A HIGH YIELD AND SHORT PERIOD OF TIME IN SOLVENT FREE CONDITIONS. NMR SPECTRA OF DECAHYDROACRIDINE 1, 8 DIONE WERE ANALYZED.