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Produits Chimiques Ugine Kuhlmann
Ugine Kuhlmann SA
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Produits Chimiques Ugine Kuhlmann
Ugine Kuhlmann SA
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Priority claimed from FR7322695Aexternal-prioritypatent/FR2234351B1/fr
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Pyridine Compounds
(AREA)
Inks, Pencil-Leads, Or Crayons
(AREA)
Abstract
A procedure for the preparation of dyes of the general formula: **(See formula)** where R represents a methyl or ethyl group, R1 represents an optionally substituted alkyl group, R2 represents a hydrogen atom or an optionally substituted alkyl group and the benzene nucleus A can be substituted, the molecule being free of groups that cause water-solubility by formation ion, whose procedure is characterized by coupling the diazoic derivative of an amine of formula: **(See formula)** with a compound of the formula: **(See formula)** where A, R, R1 and R2 are the ones defined above. (Machine-translation by Google Translate, not legally binding)
ES427387A1973-06-211974-06-18A procedure for the preparation of colorants. (Machine-translation by Google Translate, not legally binding)
ExpiredES427387A1
(en)