New esters of substituted anilinonicotinic and phenylanthranilic acids

In the search for new non-steroidal antiinflammatory drugs with low ulcerogenic activity, phthalidyl and pivaloyloxymethyl esters of anilinonicotinic and N-phenylanthranilic acids were synthesized. One of them, the 3-phthalidyl ester of 2-([3-(trifluoromethyl)phenyl]amino)-3-pyridinecarboxylic acid, also named talniflumate, showed lower ulcerogenic activity and toxicity and greater antiinflammatory activity than the niflumic acid.