Preparation of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide

Preparation of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide

A process for preparing 3-isopropy1-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide (I) or a salt of I, which comprises reacting anthranilic isopropylamide II, simultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic...

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Hauptverfasser: MULLER, ALBRECHT, FRETSCHNER, ERICH, WOERZ, OTTO, MERKLE, HANS RUPERT, HANSEN, HANSPETER
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CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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creator MULLER, ALBRECHT
FRETSCHNER, ERICH
WOERZ, OTTO
MERKLE, HANS RUPERT
HANSEN, HANSPETER
description A process for preparing 3-isopropy1-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide (I) or a salt of I, which comprises reacting anthranilic isopropylamide II, simultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic bases and phosphorus oxychloride at from 50 DEG C to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.
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subjects CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title Preparation of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one-2,2-dioxide
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