ES230929A1 - Procedure papa the preparation of derivatives of the 3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
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Procedure papa the preparation of derivatives of the 3,5-dioxo-pirazolidina (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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Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Abstract
Process for the preparation of derivatives of the 3,5-dioxo-pyrazolidin of the general formula ** (See formula) ** in which they mean R a primary or secondary hydrocarbon radical having at least two carbon atoms, optionally interrupted by heteroatoms and optionally substituted by oxy or oxo groups, and aryl an unsubstituted or substituted phenyl radical, characterized in that an alcohol of the general formula R-OH is transposed, in which R has the meaning indicated above, with a 1,2-diaryl-5,5-dioxo-pyrazolidin of the general formula ** (See formula) ** in the presence of hydrogenation catalysts. (Machine-translation by Google Translate, not legally binding)
ES0230929A1956-09-161956-09-15Procedure papa the preparation of derivatives of the 3,5-dioxo-pirazolidina (Machine-translation by Google Translate, not legally binding)
ExpiredES230929A1
(en)