| 摘要 |
The present invention relates to a process for the preparation of compounds of the formula I <IMAGE> (I) in which R1 denotes H, halogen, (C1-C4)-alkyl or (C1-C4)-alkoxy and R2 denotes H, halogen, (C1-C4)-alkyl, (C1-C4)-alkyl-thio, (C1-C4)-alkoxy or the bivalent group 3,4-0-CH2-O, comprising reacting a compound of the formula II <IMAGE> (II) in which X denotes halogen and R2 has the meaning as in formula I, in the presence of a copper catalyst with an alkali metal phenolate or alkaline earth metal phenolate of the formula III <IMAGE> (III) in which M denotes an alkali metal or an alkaline earth metal and R1 has the meaning as in formula I.
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