Method for producing 2-dihaloacyl-3-amino-acrylic acid esters and 3-dihalomethyl pyrazole-4-carboxylic acid esters
The present invention relates to a process for preparing 2-dihaloacyl-3-aminoacrylic esters of the formula (I) by reacting acid halides of the formula (II) with dialkylaminoacrylic esters of the formula (III) in which R, R1, R2, X1, X2 and Hal are each as defined in the disclosure in a water-immisci...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The present invention relates to a process for preparing 2-dihaloacyl-3-aminoacrylic esters of the formula (I) by reacting acid halides of the formula (II) with dialkylaminoacrylic esters of the formula (III) in which R, R1, R2, X1, X2 and Hal are each as defined in the disclosure in a water-immiscible organic solvent in the presence of a base, to the novel 2-dihaloacyl-3-aminoacrylic esters of the formula (I) themselves, to their use for preparing 3-dihalomethylpyrazoles, to a process for preparing 3-dihalo-methylpyrazoles, and to novel 3-dihalomethylpyrazoles. |
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