PROCESS FOR THE PREPARATION OF AN HERBICIDE CONTAINING ACID FENOXI-PROPIONIC SUBSTITUTED DERIVATIVES

摘要

Novel substituted derivatives of phenoxypropionic acid of the formula IMAGE in which X1 is hydrogen or halogen, X2 is trifluoromethyl or halogen, Z is nitrogen or the radical CX where X is hydrogen or halogen and R is the radical of the formula IMAGE where Y is oxygen or sulphur, R1 is hydrogen, alkyl having 1 to 6 carbon atoms or aryl, R2 is hydrogen, alkyl having 1 to 6 carbon atoms, alkenyl having 3 to 8 carbon atoms or optionally substituted aryl, or R1 and R2 together are an optionally substituted alkylene chain having 2 to 4 carbon atoms, and R3 is hydrogen, alkyl having 1 to 6 carbon atoms or optionally substituted aryl, or R is the radical of the formula IMAGE where A is an optionally substituted alkylene chain having 2 to 4 carbon atoms, or R is the radical of the formula IMAGE where R4 is hydrogen or alkyl having 1 to 6 carbon atoms, several processes for preparing the novel substances, and their use as herbicides.