Preparation of o,o'-dithiodibenzoic acids

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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562432, C07C14352, C07C14940

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active

044938020

ABSTRACT:
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.degree. to 50.degree. C. and then in a 2nd stage at from 80.degree. to 100.degree. 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.

REFERENCES:
patent: 2064395 (1936-12-01), Tschunkur et al.

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