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
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
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Filing date
Publication date
Priority claimed from CH156369Aexternal-prioritypatent/CH553839A/en
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES376042A1publicationCriticalpatent/ES376042A1/en
Process for the preparation of ketoaromatic compounds of the formula (l) a1-b-r-b-a2 In which A1 and a2 mean radicals of polycyclic quinones, of which one must be tinable. B means a pentagonal or hexagonal heterocyclic radical having at least one cyclic nitrogen atom; y R means the radical of a polyvalent hydroxyl or mercaptide compound, which is attached by two of its oxygen or sulfur atoms to a carbon atom of radical b, Characterized by reacting heterocyclic compounds, provided with a pentagonal or hexagonal radical having at least 1 and preferably 2 or 3 cyclic nitrogen atoms and which contain at least two easy dissociation substituents, with polyvalent hydroxyl or mercapto compounds and polycyclic quinones containing condensable groups, to form compounds of the formula (1). (Machine-translation by Google Translate, not legally binding)
ES376042A1969-01-311970-01-30Procedure for the preparation of cetoaromatic compounds. (Machine-translation by Google Translate, not legally binding)
ExpiredES376042A1
(en)