Synthesis And Biological Evaluation of New S-Mannich Bases of 3-Methyl-4-Phenyl-3,4,5,6,7,8, Hexahydroquinazoline-2(1h)-Thione.

The chalcone was synthesized from cyclohexanone and an aromatic aldehyde by aldol condensation reaction, followed by cyclisation with thiourea results in hexahydro quinazoline. The third position is methylated by using methyl iodide, finally the mannich reaction was carried out with five different amines at second position of the hexahydro quinazoline to get five different S-Mannich bases. All the 5 synthesized new compounds were studied for their physiochemical characters. And their structures were confirmed by spectral studies (IR, NMR). These new derivatives were evaluated for analgesic and anti-inflammatory activity.