In order to investigate optimum loading of catalyst and reaction condition, 4-OCH3 benzaldehyde (1mmol), resorcinol (1mmol), were reacted with malononitrile (1mmol) as model reaction with different amount of dealuminated mesolite as catalyst under reflux condition and results are summarized in (Table 1.1). In the absence of catalyst the reaction did not gave satisfactory yield of desired product (4c), which indicate crucial role of catalyst 0.1 g of dealuminated mesolite is suitable to catalyze reaction smoothly. The same reaction was carried out under different protic and aprotic solvents and it is observed that the reaction proceeds faster in protic solvent such as water and ethanol with maximum yield in reduced time as compare to non protic solvents such as terahydrofuran and actonitrile which gave lower yield.