| abstract |
The invention relates to a process for preparing aryl-acetic acid derivatives of the formula (I) (I) where R1 is hydrogen, halogen, , , (C1-C8)alkyl, phenyl, which can each also be substituted by hydroxy and amino groups, R2 is hydrogen, (C1-C8)-alkyl, phenyl, and Ar is phenyl, naphthyl, anthracenyl, phenanthrenyl, each of which may be unsubstituted or substituted by halogen, OH, polyfluoro-(C1-C8)-alkyl, CN, (C1-C4)-alkoxy, NO2, COO-(C1-C4)alkyl, CON[(C1-C4)alkyl]2, NH(C1-C4)alkyl, N[(C1-C4)alkyl]2, NH2, SO3H, SO3 ( C1 - C4 ) alkyl, SO2NH2, O-CO-(C1- C4 ) alkyl, CH2-halogen, which comprises carbonylating compounds of the formula (II) ( I I ) where Ar and R1 have the meanings given above and Halogen is I, Br, Cl, using a water-soluble metal complex as catalyst in a two-phase system. |