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US 2009/0156839 A1Published application
Method for producing 2,5-dimethylphenyl acetic acid
AssigneeBayer CropScience AG
InventorThomas HIMMLER
Life of this patent
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Abstract
The invention relates to a method for preparing 2,5-dimethylphenylacetic acid by converting p-xylene with chloroacetyl chloride into 2-chloro-1-(2,5-dimethylphenyl)ethanone, which is reacted with the compound of the formula (II) to give the compound of the formula (III), which is then rearranged to give a mixture of the compounds (IV) and (V), which is then hydrolyzed to 2,5-dimethylphenylacetic acid.
Claims2
1-3. (canceled)
A compound of the formula (III)
- in which
- X is a direct single bond, CH2, CHCH3, C(C2H5)2, C(CH3)2 or C(C2H5)2.
Dependencies are inferred from the claim text.