METHOD FOR PRODUCING 2-DIHALOACYL-3-AMINO-ACRYLIC ACID ESTERS AND 3-DIHALOMETHYLPYRAZOLE-4-CARBOXYLIC ACID ESTERS
The invention relates to a method for producing 2-dihaloacyl-3-amino-acrylic acid esters of formula (I). Said method is characterised in that acid halides of formula (II) are reacted with dialkyl amino-acrylic acid esters of formula (III), in which R, R 1, R2, X1, X2 and Hal are defined as cited in...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to a method for producing 2-dihaloacyl-3-amino-acrylic acid esters of formula (I). Said method is characterised in that acid halides of formula (II) are reacted with dialkyl amino-acrylic acid esters of formula (III), in which R, R 1, R2, X1, X2 and Hal are defined as cited in the description, in a water-immiscible organic solvent in the presence of a base. The invention also relates to the novel 2-dihaloacyl- 3-amino-acrylic acid esters of formula (I), to their use for producing 3- dihalomethyl-pyrazoles, to a method for producing 3-dihalomethyl- pyrazoles, in addition to novel 3-dihalomethyl-pyrazoles. |
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