Processes for the preparation of 4-hydroxy-2H-1-benzothiopyran-3-carboxamide 1,1-dioxides

Abstract

Processes for the production of the compounds of the formula: ##STR1## are disclosed. In the above formula, R.sub.1 is aryl which may be substituted or unsubstituted; R.sub.2 is hydrogen, alkyl, aryl, aralkyl, alkoxy, halogen, cyano, nitro, trifluoromethyl and the like. These compounds are prepared by the following reaction schemes: ##STR2## These compounds are useful as anti-inflammatory agents.

Dependencies are inferred from the claim text.