The synthesis and antiinflammatory activity of 5-substituted 2-arylbenzoxazoles are described. Initial screening on carrageenin-induced rat paw edema showed that cu- methylacetic substitution in the 5 position was preferable to substitutions with the equivalent esters, amides, alcohols, amines, or tetrazoles. Halogen substitution in the aryl ring led to the most active compounds which were 2-(4-chlorophenyl)-~-methyl-5-benzoxazoleacetic ...