ES236932A1 - Procedure for the preparation of heterocyclic carboxylic acids of the pirazolica series, as well as their esters and their salts (Machine-translation by Google Translate, not legally binding)
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Procedure for the preparation of heterocyclic carboxylic acids of the pirazolica series, as well as their esters and their salts (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 ES236932A1publicationCriticalpatent/ES236932A1/en
Process for the preparation of heterocyclic carboxylic acids of the pyrazole series, as well as their esters and salts, characterized in that compounds of the general formula are prepared ** (See formula) ** where they mean Ar1 and Ar2 phenyl radicals which may be substituted by alkyl or alkoxy groups of low molecular weight, or by halogen atoms. R an alkyl radical of low molecular weight, R1 hydrogen, or a low molecular weight alkyl radical, and R2 hydrogen, a low molecular weight alkyl radical, or a normal equivalent of a cation, transposing a metal compound of a 4-substituted 1, 2-diaryl-3,5-dioxo-pyrazolidin of the general formula ** (See formula) ** or its tautomeric form, with an alpha-halogenoalkancarboxylic ester of the general formula ** (See formula) ** where they mean X a halogen atom, and R2 'is a low molecular weight alkyl radical, optionally converting the ester obtained by subsequent hydrolysis to the free acid and, if desired, converting the latter to a salt with an inorganic or organic base. (Machine-translation by Google Translate, not legally binding)
ES0236932A1956-08-031957-08-02Procedure for the preparation of heterocyclic carboxylic acids of the pirazolica series, as well as their esters and their salts (Machine-translation by Google Translate, not legally binding)
ExpiredES236932A1
(en)
Procedure for the preparation of heterocyclic carboxylic acids of the pirazolica series, as well as their esters and their salts (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of heterocyclic carboxylic acids of the pirazolica series, as well as their esters and their salts (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of heterocyclic carboxylic acids of the series of los pirazoles, as well as their esters and salts (Machine-translation by Google Translate, not legally binding)
A procedure for the preparation of substitute 1,2-diarile-3,5-dioxo-pirazolidines in position 4 (Machine-translation by Google Translate, not legally binding)