The arylhydrizocyanacetamides (1) was prepared from the reaction of diazonium salts of substituted aniline with active methylene compounds such as cyanoacetamide.  The compounds were reacted with substituted phenyl  isothiocyanates in dry pyridine to give corresponding 2,4-N-aryl-as-1,2,4-triazine 3-thiones.  Some of the compounds show promising anti-inflammatory activity.