ES200303A1 - A procedure for the preparation of substitute 1,2-diadril-3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of substitute 1,2-diadril-3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
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
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JR Geigy AG
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Priority to ES0200303ApriorityCriticalpatent/ES200303A1/en
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Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
Procedure for the preparation of new 3-4-substituted-5-4-dioxo-pyrazolidines and their salts characterized in that a functional derivative capable of reacting of a monosubstituted malonic acid R-CH (COOH) 2 is transposed as a di-ester dihalogenide esterhalogenide with a 1. 2-diarylhydrazine conveniently in the presence of a condensation medium or respectively an acid fixing agent in compounds of the formula ** (see formula) ** in which R denotes an organic radical linked by a primary carbon atom or is Secondary with the pyrazolidine ring, particularly a saturated or unsaturated cycloaliphatic or araliphatic aliphatic hydrocarbon radical and phenyl radicals equal to or different from which at least one is substituted by a group containing sulfur oxygen or/and nitrogen with the exception of alkoxy group transposing these products. with inorganic or organic bases in its salts. (Machine-translation by Google Translate, not legally binding)
ES0200303A1951-11-051951-11-05A procedure for the preparation of substitute 1,2-diadril-3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
ExpiredES200303A1
(en)
Procedure for the obtaining of new derivatives of the phosphorus and the compositions that contain them. (Machine-translation by Google Translate, not legally binding)