EP1020443A1 — Process for producing piperazinesulfonamide derivatives and salts thereof
Assigned to Azwell Inc · Expires 2000-07-19 · 26y expired
What this patent protects
A process for advantageously producing compounds of general formula (III), wherein R 1 represents hydrogen, alkyl having 1 to 6 carbon atoms, alkoxyl having 1 to 4 carbon atoms, halogen, hydroxyl, trifluoromethyl, nitro or amino, R 2 represents substituted or unsubstituted phen…
USPTO Abstract
A process for advantageously producing compounds of general formula (III), wherein R 1 represents hydrogen, alkyl having 1 to 6 carbon atoms, alkoxyl having 1 to 4 carbon atoms, halogen, hydroxyl, trifluoromethyl, nitro or amino, R 2 represents substituted or unsubstituted phenyl or pyridyl, R 3 and R 4 each represents hydrogen, alkyl having 1 to 6 carbon atoms, hydroxyalkyl having 1 to 4 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, or substituted or unsubstituted phenyl; and Y represents alkylene having 1 to 12 carbon atoms, and salts thereof.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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