| 摘要 |
<p>1. A process for the preparation of a compound of the general formula see diagramm : EP0212607,P11,F3 in which R denotes a chlorine or bromine atom and X denotes a hydrogen atom or a (C1 -C6 ) alkyl group and n denotes the number 0, 1 or 2, wherein halo-benzenes of the general formula (2) see diagramm : EP0212607,P11,F4 in which R and X have the meanings specified above and Y represents a chlorine or bromine atom, are reacted with mercaptoethanol in a dipolar aprotic solvent in the presence of an alkali metal oxide, hydroxide or carbonate at temperatures of 80-140 degrees C to form halophenyl hydroxyethyl sulfides of the general formula (3) see diagramm : EP0212607,P12,F1 in which R and X have the meanings specified above, and these are reacted directly in the reaction mixture produced or after removal of the volatile and solid components, preferably in the presence of water, at a pH of 1 to 7 at temperatures of 20 to 120 degrees C with 1 mol of oxidizing agent (per mol of halophenyl hydroxyethyl sulfide) to form compounds of the formula (1) with n = 1, or are reacted with at least 2 mol of oxidizing agent (per mol of halophenyl hydroxyethyl sulfide) to form the compounds of formula (1) with n = 2.</p> |
