Process for the preparation of naphthalene-1,4,5,8-tetracarboxyl

Details Process for the preparation of naphthalene-1,4,5,8-tetracarboxyl Process for the preparation of naphthalene-1,4,5,8-tetracarboxyl

1976-05-04

1978-06-27

Siegel, A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260523R, C07D31102, C07C 5133

Patent

active

040974928

ABSTRACT:
Naphthalene-1,4,5,8-tetracarboxylic acid and typical derivative(s) thereof is (are) prepared by oxidation of periacenaphthindenones of the formula ##STR1## where R is H or lower alkyl, in a lower aliphatic carboxylic acid with nitric acid, optionally using also oxygen, in the presence of oxidation catalysts at temperatures above about 100.degree. C; the reaction product being worked up in known manner. Naphthalene-1,4,5,8-tetracarboxylic acid is an important preliminary product for the manufacture of dyestuffs.

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