ES238622A1 - Procedure for the preparation of 3,5 - dioxo - pirazolidines (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of 3,5 - dioxo - pirazolidines (Machine-translation by Google Translate, not legally binding)
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Novartis AG
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JR Geigy AG
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Publication of ES238622A1publicationCriticalpatent/ES238622A1/en
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
Process for the preparation of 3,5-dioxo-pyrazolidines by condensation of a functional acid derivative of malonic acid, optionally monosubstituted, with 1,2-disubstituted hydrazine, preponderantly with 1,2-diphenylhydrazine, characterized in that the condensation in the presence of a hexyl alcohol. (Machine-translation by Google Translate, not legally binding)
ES0238622A1957-11-171957-11-16Procedure for the preparation of 3,5 - dioxo - pirazolidines (Machine-translation by Google Translate, not legally binding)
ExpiredES238622A1
(en)
Procedure for the preparation of new aqueous solutions of adrenocrome monosemicarbazone. (Machine-translation by Google Translate, not legally binding)
A procedure for the obtaining by synthesis of 4-amino-3-isoxazolidone and its derivatives (Machine-translation by Google Translate, not legally binding)