HERBICIDALLY ACTIVE (ALPHA)-(4-PHENOXYPHENOXY) PROPIONIC ACID ALKOXYALKYL AMIDES, PROCESSES FOR THEIR MANUFACTURE, HERBICIDALLY COMPOSITIONS CONTAINING THEM AND THEIR USE

摘要

The present invention relates to novel herbidically active 4-(p-trifluoromethylphenoxy)-.alpha.-phenoxypropionic acic alkoxyalkyl amides, processes for their manufacture and also herbicidal compositions which contain them. The preferred utility of the novel compounds is the selective control of monocotyledonous weeds. The novel compounds have the general formula I (I) wherein "alkylene" represents a straight or branched saturated hydrocarbon chain of 1 to 4 carbon atoms and R represents an alkyl radical of 1 to 4 carbon atoms. The novel compounds are obtained by reacting a halide or lower alkyl ester of 4-(p-trifluoromethylphenoxy)-a-phenoxypropionic acid with an alkoxyalkyl amine H2N-alkylene-O-R or by reacting a hydroxydiphenyl ether wherein Y is hydrogen or a cation, with an a-halopropionic acid alkoxyalkl amide of the formula in the presence of an acid acceptor. Preferred compounds of the formuls I are N-(2-me-thoxy)-ethylamide and N-(3-methoxy)-propyl-(2)-amide.