Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole
AssigneeCassella Aktiengesellschaft
InventorsSteffen Piesch, Friedrich Engelhardt, Herbert Wille, Wolf Weidemuller, Artur Meyer
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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.
Claims8
The process for the preparation of a 3-(4-hydroxyanilino)-carbazole of the formula ##STR5## wherein R is hydrogen, alkyl having 1 to 8 carbon atoms or halogenalkyl having 1 to 8 carbon atoms, comprising reacting a 3-aminocarbazole of the formula. ##STR6## 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.
Dependencies are inferred from the claim text.