ES200304A1 - A procedure for the preparation of derivatives of 3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of derivatives of 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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
JR Geigy AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JR Geigy AGfiledCriticalJR Geigy AG
Priority to ES0200304ApriorityCriticalpatent/ES200304A1/en
Publication of ES200304A1publicationCriticalpatent/ES200304A1/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 new 3,5-dioxo-pyrazolidines, substituted in position 4, 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 diester, a dihalogenide, or an ester halide, with a 1,2-diarylhydrazine, conveniently in the presence of a condensation medium, or respectively, an acid-binding agent, in compounds of the formula ** (See formula) ** in which they mean R a hydrocarbon radical, interrupted by heteroatoms or groups of heteroatoms, and aryl is a phenyl radical, unsubstituted or substituted, by transposing these products, if desired, into their salts. (Machine-translation by Google Translate, not legally binding)
ES0200304A1951-11-051951-11-05A procedure for the preparation of derivatives of 3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
ExpiredES200304A1
(en)
Procedure for the obtaining of esters of the tiol-o tionotilfosforico or phosphonic acid. (Machine-translation by Google Translate, not legally binding)
Procedure for the obtaining of new derivatives of heterocyclic hydrazines and their salts (Machine-translation by Google Translate, not legally binding)