METHOD FOR THE PREPARATION OF 3-ISOPROPPYL-1H-2,1,3-BENZOTHIADIAZIN-4(3H)-ON-2,2-DIOXIDE

METHOD FOR THE PREPARATION OF 3-ISOPROPPYL-1H-2,1,3-BENZOTHIADIAZIN-4(3H)-ON-2,2-DIOXIDE

The invention relates to a method for the preparation of the compound given above in the title or its salt with the formula By the method isopropylamide of the anthranylic acid with the formula reacts simultaneously with sulphur trioxide or chlorsulphonic acid in the presence of an organic base, or...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BENZ, KURT, FRETSCHNER, ERICH, WOERZ, OTTO, MERKLE, HANS R, MUELLER, ALBRECHT, HANSEN, HANSPETER
Format: Patent
Sprache:bul ; eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:The invention relates to a method for the preparation of the compound given above in the title or its salt with the formula By the method isopropylamide of the anthranylic acid with the formula reacts simultaneously with sulphur trioxide or chlorsulphonic acid in the presence of an organic base, or with adducts of sulphur trioxide and organic bases and with phosphorus oxychloride at temperatures ranging from 50 deg.C to the boiling temperature under influx. Then optionally the product can be converted into its salt.