| abstract |
A process for preparing 3,4-disubstituted phenylacetic acids of the formula (I) in which X is fluorine, chlorine, bromine or iodine and R is C 1 -C 4 -alkylthio, C 1 -C 4 -alkylsulfonyl or C 1 -C 4 -alkylsulfoxide, starting from a 2-halo-C 1 -C 4 -alkylthiobenzene of the formula (II) in which X is as defined above and R1 is C 1 -C 4 -alkylthio. |