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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CH1906370Aexternal-prioritypatent/CH574477A5/en
Priority claimed from CH1761471Aexternal-prioritypatent/CH596274A5/en
Application filed by Ciba Geigy AGfiledCriticalCiba Geigy AG
Publication of ES398187A1publicationCriticalpatent/ES398187A1/en
Process for the preparation of azo compounds, of the type that contain the radical of a 3-sulfoalkyl-6-hydroxypyridone- (2), characterized by coupling a diazo compound preferably with a coupling component of the formula **(See formula)** in which R and R1 each signify a hydrogen atom, an alkyl or aryl radical or a heterocyclic radical, while X signifies a sulfoalkyl group, preferably a sulfomethyl group, and in particular a group of the formula -CH-SO3H in which V stands for a low molecular weight alkyl radical, an aryl or heterocyclic radical, optionally substituted, or, preferably, a hydrogen atom, followed, optionally by metallization or acylation. (Machine-translation by Google Translate, not legally binding)
ES398187A1970-12-221971-12-21Procedure for the preparation of azoic compounds. (Machine-translation by Google Translate, not legally binding)
ExpiredES398187A1
(en)