Process for the preparation of salts of substituted or unsubstit

Details Process for the preparation of salts of substituted or unsubstit Process for the preparation of salts of substituted or unsubstit

1996-05-02

1998-03-03

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562483, 562493, 564149, C07C 6316, C07C 6317

Patent

active

057236585

ABSTRACT:
The present invention relates to a process for the preparation of salts of substituted or unsubstituted phthalic acids, by reacting a compound of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and are H, F, Cl, Br, CF.sub.3, OH, an alkoxy or alkyl radical in each case having 1 to 4 carbon atoms, or a radical --NR.sup.7 R.sup.8, in which R.sup.7 and R.sup.8 are identical or different and are H, an alkyl radical having 1 to 4 carbon atoms, or a phenyl radical, R.sup.5 and R.sup.6 are identical or different and are H, a --CO-- alkyl group having 1 to 6 carbon atoms in the alkyl radical, or a benzoyl group, or R.sup.5 and R.sup.6 together form a radical of the formula ##STR2## in which R.sup.9, R.sup.10, R.sup.11 and R.sup.12 are identical or different and are H, F, Cl, Br, CF.sub.3, OH, an alkoxy or alkyl radical in each case having 1 to 4 carbon atoms, or a radical --NR.sup.7 R.sup.8, in which R.sup.7 and R.sup.8 are identical or different and are H, an alkyl radical having 1 to 4 carbon atoms, or a phenyl radical, with water, a water-soluble base, and an oxidizing agent at a temperature of -10.degree. to 150.degree. C. in the presence or absence of a water-insoluble solvent inert under the reaction conditions.

REFERENCES:
patent: 4769493 (1988-09-01), Ito et al.
patent: 5274115 (1993-12-01), Papenfuhs et al.
patent: 5384413 (1995-01-01), Pfirmann et al.

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