Process for the preparation of naphthalene-1,4-dicarboxylic acid
AssigneeHoechst Aktiengesellschaft
InventorsHans Frischkorn, Erich Schinzel
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Abstract
Process for the preparation of naphthalene-1,4-dicarboxylic acid, wherein 4-bromo-1-naphthoic acid is reacted with at least 1 mole of copper-(I) cyanide per mole of 4-bromonaphthoic acid in a polar, aprotic solvent, and the copper salt complex of 4-cyanonaphthoic acid thus obtained is saponified in an alkaline medium.
Claims3
Process for the preparation of naphthalene-1,4-dicarboxylic acid, wherein 4-bromo-1-naphthoic acid is reacted with at least 1 mole of copper-(I) cyanide per mole of 4-bromonaphthoic acid in a polar, aprotic solvent at a temperature of 150.degree.-250.degree. C. and the copper salt complex of 4-cyanonaphthoic acid thus obtained is saponified in an alkaline medium.
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