| abstract |
A process for the preparation of halogenated hydroxy diphenyl compounds, which are not substituted in the 2¿ and 6¿ positions, of the formula by acylation of a halogenated benzene compound (first step), etherification of the acylated compound with a halogenated phenol compound which is not further substituted in the ortho position (second stage), oxidation of the etherified compound (third stage) and hydrolysis of the oxidized compound in a fourth stage, wherein the reaction of the second stage is carried out in the presence of K2CO3 and any desired copper catalyst, wherein K2CO3 is used in a concentration between 0.5 and 3 mol, based on the phenol compound used of the formula (6) in accordance with the following reaction scheme: (4) wherein R1 and R2 independently of each other they are F, Cl or Br; R3 and R4 independently of each other are hydrogen; or C1-C4 alkyl; m is 1 to 3; Y |