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Sandoz AG
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Sandoz AG
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Priority to ES287816ApriorityCriticalpatent/ES287816A1/en
Publication of ES287816A1publicationCriticalpatent/ES287816A1/en
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Abstract
"Procedure for obtaining new heterocyclic compounds" compounds that conform to the general formula I ** (See formula) ** wherein R1 represents a hydrogen atom or an alkyl radical of 1 or 2 carbon atoms, and R2 and R3 each represent a hydrogen atom or an alkyl radical of up to 3 carbon atoms, with the proviso that R2 and R3 do not have to be different, and their addition salts with acids, characterized in that a compound of formula II is reduced, ** (See formula) ** wherein R1 has the above meaning, or a compound of formula III, ** (See formula) ** or a compound of formula IV, ** (See formula) ** wherein R2 and R3 have the respective above meanings, and when a product of the reduction is obtained in which R2 and/or R3 are hydrogen atoms and a final alkylated product is required, the reduction product is alkylated to give the required compound I and, when an acid addition salt is required, salification with an organic or inorganic acid is carried out. (Machine-translation by Google Translate, not legally binding)
ES287816A1963-05-081963-05-08Procedure for obtaining new heterocyclic compounds (Machine-translation by Google Translate, not legally binding)
ExpiredES287816A1
(en)