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
Original Assignee
Ciba Geigy AG
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Publication date
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Priority to ES0311499ApriorityCriticalpatent/ES311499A3/en
Publication of ES311499A3publicationCriticalpatent/ES311499A3/en
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Abstract
Process for the preparation of urea derivatives, of the general formula ** (See formula) ** where R1 means a hydrogen atom, an alkyl or lower alkoxy group or a halogen atom, R2 means a hydrogen atom or an alkyl or lower alkoxy group, and R3 means a lower alkyl group, while R2 and R3 together with the nitrogen atom can also be members of a cyclic system, characterized by being treated with brominating agents, urea derivatives of the general formula ** (See formula) ** where R1, R2 and R3 have the same meaning as stated earlier in this claim. (Machine-translation by Google Translate, not legally binding)
ES0311499A1965-04-061965-04-06Procedure for the preparation of urea derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES311499A3
(en)
Procedure for preparation of derivatives of hydroxymethyl-5 oxazoldinone-2 replaced in 3. (Machine-translation by Google Translate, not legally binding)