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Sandoz AG
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Sandoz AG
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Priority to ES353014ApriorityCriticalpatent/ES353014A1/en
Publication of ES353014A1publicationCriticalpatent/ES353014A1/en
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Abstract
Process for the production of pyridazone derivatives, of general formula I, **(See formula)** where X signifies a chlorine or bromine atom, R1 signifies a hydrogen atom or a methyl radical, and R2 signifies a methyl radical or, when R1 signifies a hydrogen atom, R2 can also signify an ethyl radical, characterized in that a compound of general formula II is reacted, **(See formula)** wherein X has the meaning indicated above, with a compound of general formula III, **(See formula)** in which R1 and R2 have the meanings indicated above. (Machine-translation by Google Translate, not legally binding)
ES353014A1968-04-221968-04-22Procedure for the production of pyridazone derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES353014A1
(en)