Abstract
A variety of novel 3-(2-methylphenyl)-2-substituted amino-quinazolin-4(3H)-ones were synthesized by reacting the amino group of 2-hydrazino-3-(2-methylphenyl)-quinazolin-4(3H)-one with a variety of aldehydes and ketones. The starting material 2-hydrazino-3-(2-methylphenyl)-quinazolin-4(3H)-one was synthesized from 2-methyl aniline. The title compounds were investigated for analgesic, anti-inflammatory and ulcerogenic index activities. Among these, the compound 2-(1-ethylpropylidene)-hydrazino-3-(2-methylphenyl)-quinazolin-4(3H)-one emerged as the most active compound for analgesic activity, while the compound 2-(1-methylbutylidene)-hydrazino-3-(2-methylphenyl)-quinazolin-4(3H)-one showed most potent anti-inflamma-tory activity of the series and was moderately more potent in its anti-inflammatory activity when compared to the reference standard diclofenac sodium (CAS 15307-86-5). Interestingly, the test compounds showed only mild ulcerogenic potential when compared to acetylsalicylic acid (CAS No: 50-78-2).
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