MANUFACTURE OF 0,0'-DITHIODIBENZOIC ACID

MANUFACTURE OF 0,0'-DITHIODIBENZOIC ACID

o,o'-Dithiodibenzoic acids are prepared by a process wherein a diazotized anthranilic acid or anthranilate is reacted with sulfur dioxide in the presence of an acid, water and a copper salt, and if desired in the presence of an alkali metal iodide, in a 1st stage at from 20 DEG to 50 DEG C. and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HAAGEN IEDEITSUKE, PEETAA TONNE
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:o,o'-Dithiodibenzoic acids are prepared by a process wherein a diazotized anthranilic acid or anthranilate is reacted with sulfur dioxide in the presence of an acid, water and a copper salt, and if desired in the presence of an alkali metal iodide, in a 1st stage at from 20 DEG to 50 DEG C. and then in a 2nd stage at from 80 DEG to 100 DEG C. The o,o'-dithiodibenzoic acids obtainable by the process of the invention are useful starting materials for the preparation of crop protection agents, dyes and drugs.