Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole

US4320060A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Steffen Piesch · Oberursel, DE
• Friedrich Engelhardt · Frankfurt, DE
• Herbert Wille · Frankfurt, DE
• Wolf Weidemuller · Frankfurt am Main, DE
• Artur Meyer · Schöneck, DE

Key dates

• Filing date: Dec 31, 1979
• Grant date: Mar 16, 1982
• Expiry date: Dec 31, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D209/88
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The process for the preparation of a 3-(4-hydroxyanilino)carbazole of the formula ##STR1## wherein R is hydrogen, alkyl having 1 to 8 carbon atoms or halogenoalkyl having 1 to 8 carbon atoms, comprising reacting a 3-aminocarbazole of the formula ##STR2## with p-hydroquinone or p-aminophenol or a mixture of p-hydroquinone and p-aminophenol in at least stoichiometric amounts by heating to a temperature of 150.degree. to 300.degree. C. with exclusion of oxygen.