METHOD FOR THE PRODUCTION OF 3-ISOPROPYL-IH-2, 1,3-BENZOTHIADIAZINE-4 (3H)-ONE-2,2-DIOXIDE

METHOD FOR THE PRODUCTION OF 3-ISOPROPYL-IH-2, 1,3-BENZOTHIADIAZINE-4 (3H)-ONE-2,2-DIOXIDE

A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of Iwhich comprises reacting anthranilic isopropylamide IIsimultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic bas...

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Bibliographische Detailangaben
Hauptverfasser: HANSPETER HANSEN, KURT BENZ, HANS RUPERT MERKLE, ERICH FRETSCHNER, ALBRECHT MUELLER, OTTO WOERZ
Format: Patent
Sprache:eng ; por
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of Iwhich comprises reacting anthranilic isopropylamide IIsimultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic basesandphosphorus oxychloride at from 50° C. to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.