Triazines as anti-inflammatory agents.

5,6-Diphenyl 1,2,4-triazine-3-thiol (III) was synthesized from alpha-diketone benzyl (II); II in turn was synthesized from benzoin (I). III on reaction with 1-chloro-2,3-epoxy propane yielded 3-[(oxiranyl methyl)thio]-5,6-diphenyl 1,2,4-triazine (IV). IV was converted to 3-[5,6-diphenyl-1,2,4-triazine-3-yl thio]-3-substituted propanols (V) on reaction with aryl amines. These compounds were screened for their anti-inflammatory activity in albino rats with carrageenin induced paw oedema. Two compounds, Ve and Vl, exhibited significant anti-inflammatory activity compared to the standard, phenylbutazone, with high ALD50 values.