| 摘要 |
A novel process affords omega-ketocarboxylic acid derivatives of the formula (I) in which R<1>, R<2>, R<3>, and n are as defined in the description by reaction of compounds of the formula (II) with compounds of the formula (III) or with compounds of the formula (IV) in which m is as defined in the description in anhydrous hydrogen fluoride, if appropriate in the presence of boron trifluoride. Novel omega-ketocarboxylic acid derivatives of the formula (If) in which R<1-1>, R<2-1>, R<3-1 >and q are as defined in the description.
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