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
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Priority to ES0243165ApriorityCriticalpatent/ES243165A2/en
Publication of ES243165A2publicationCriticalpatent/ES243165A2/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
Improvements in the object of the main patent number 223,695, by "Procedure for the preparation of diimidazole derivatives", of general formula ** (See formula) ** where does it mean To a possibly substituted benzene nucleus, in which 2 neighboring carbon atoms are linked with the two imidazole nitrogen atoms, R and R1 hydrogen, or equal or different substituents, symbolizing X hydrogen, or a hydroxyl group, by dissociation of water from the salts of compounds of general formula ** (See formula) ** wherein A, R, R1, and X have the aforementioned significance, characterized in that the dissociation of water takes place at an increased temperature in a concentrated, low molecular weight aliphatic carboxylic acid and with the aid of urea. (Machine-translation by Google Translate, not legally binding)
ES0243165A1958-07-171958-07-17Procedure for the preparation of diimidazolderivados (Machine-translation by Google Translate, not legally binding)
ExpiredES243165A2
(en)