PROCESS FOR PREPARING 1,1,3-TRIOXO-1,2-BENZOTHIAZOLE-6-CARBOXAMIDE

PROCESS FOR PREPARING 1,1,3-TRIOXO-1,2-BENZOTHIAZOLE-6-CARBOXAMIDE

A process for preparing, 1,1,3-trioxo-1,2-benzothiazole-6-carboxamide of formula (I) comprising: (a) oxidizing 2,5-dimethyl-benzenesulfonamide of formula (II) in the presence of an oxidizing agent to receive 2-sulfamoyl-terephthalic acid of formula (III); (b) converting the formed 2-sulfamoyl-tereph...

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Bibliographische Detailangaben
Hauptverfasser: PILLAI, BIJUKUMAR GOPINATHAN, MIRILASHVILI, SIMA, MEKA, BHOOPAL, BARDA, YANIV, MANNAM, SREEDEVI, HAMIRANI, BHAVINKUMAR P
Format: Patent
Sprache:eng ; pol
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:A process for preparing, 1,1,3-trioxo-1,2-benzothiazole-6-carboxamide of formula (I) comprising: (a) oxidizing 2,5-dimethyl-benzenesulfonamide of formula (II) in the presence of an oxidizing agent to receive 2-sulfamoyl-terephthalic acid of formula (III); (b) converting the formed 2-sulfamoyl-terephthalic acid of formula (III) to receive 2-sulfonoyl-terephthalic acid derivative of formula (IV); and (c) reacting the resulting 2-sulfamoyl-terephthalic acid derivative of formula (IV) with ammonia (NH3) or ammonium containing-salt; wherein R represents OR′ or CI and R′ represents a branched or non-branched C1-C12 alkyl.