ES241805A1 - Procedure for the preparation of pigments of the dioxazine series (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of pigments of the dioxazine series (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Novartis AG
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JR Geigy AG
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Priority to ES0241805ApriorityCriticalpatent/ES241805A1/en
Publication of ES241805A1publicationCriticalpatent/ES241805A1/en
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Abstract
Process for the preparation of pigments of the dioxazine series, by condensation of chloroanil with primary amines and treatment under oxazine ring-forming conditions, characterized in that primary amines free of sulfonic acid groups and carboxylic acid groups are condensed with chloroanil; General Formula ** (See formula) ** where they mean X an acylamino group, whose acyl radical is derived from a carboxylic acid, And hydrogen u 0R2 and R1 and R2 are each alkyl, aralkyl or aryl groups, and why the condensation products are simultaneously or successively transformed into trifendioxazin dyes of the general formula ** (See formula) ** in which the symbols R1 and X have the significance indicated above. (Machine-translation by Google Translate, not legally binding)
ES0241805A1958-05-091958-05-09Procedure for the preparation of pigments of the dioxazine series (Machine-translation by Google Translate, not legally binding)
ExpiredES241805A1
(en)
Procedimine for the obtaining of derivatives of the acid p- [cumarinyl- (3)] - phenyl carbamine (Machine-translation by Google Translate, not legally binding)