PROCESS FOR THE REGIOSELECTIVE PREPARATION OF 1-ALKY1-3-HALOALKYLPYRAZOLE-4-CARBOXYLIC ACID DERIVATIVES

PROCESS FOR THE REGIOSELECTIVE PREPARATION OF 1-ALKY1-3-HALOALKYLPYRAZOLE-4-CARBOXYLIC ACID DERIVATIVES

The present invention relates to a process for the regioselective synthesis of 1-alkyl-3-haloalkylpyrazole- 4-carboxylic acid derivatives by cyclization of 2,3-disubstituted acrylic acid derivatives, and to the hydrazones formed as intermediates in the process.

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Bibliographische Detailangaben
Hauptverfasser: NORBERT LUI, SERGII PAZENOK, JENS-DIETMAR HEINRICH, THOMAS WOLLNER
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention relates to a process for the regioselective synthesis of 1-alkyl-3-haloalkylpyrazole- 4-carboxylic acid derivatives by cyclization of 2,3-disubstituted acrylic acid derivatives, and to the hydrazones formed as intermediates in the process.