N-substituted fused-heterocyclic carboxamide derivatives as dual

Abstract

N-substituted fused-heterocyclic carboxamide derivatives, for example, N-(2,2-diphenylethenyl)-3-hydroxythieno[3,2-b]thiophene-2-carboxamide can be prepared by ring closure between an appropriately substituted halo-thiophene ester, e.g., methyl 3-bromo-thiophene-2-carboxylate, and mercaptoacetamide followed by condensation with diphenylacetaldehyde. Alternatively, the ring closure can be carried out between an appropriately substituted mercaptothiophene ester, e.g., methyl 3-mercaptothiophene-2-carboxylate and a haloacetamide to afford the fused-heterocyclic intermediate, 3-hydroxythieno[3,2-b]thiophene-2-carboxamide. N-alkenylation of the intermediate will then lead to the final products. These compounds have been found to be effective inhibitors of both cyclooxygenase and lipoxygenase and thereby useful in the treatment of pain, fever, inflammation, arthritic conditions, eye inflammation caused by glaucoma or other eye diseases, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory bowel disease, or other prostaglandin and/or leukotriene mediated diseases.