申请人:Ciba-Geigy Corporation
公开号:US04243410A1
公开(公告)日:1981-01-06
The present invention relates to novel herbicidally active 4-(p-trifluoromethylphenoxy)-.alpha.-phenoxypropionic acid 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 ##STR1## 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)-.alpha.-phenoxypropionic acid with an alkoxyalkyl amine H.sub.2 N-alkylene-O-R or by reacting a hydroxydiphenyl ether ##STR2## wherein Y is hydrogen or a cation, with an .alpha.-halopropionic acid alkoxyalkyl amide of the formula ##STR3## in the presence of an acid acceptor. Preferred compounds of the formula I are an N-(2-methoxy)-ethylamide and N-(3-methoxy)-propyl-(2)-amide.
本发明涉及新颖的具有除草活性的4-(对三氟甲基苯氧基)-α-苯氧基丙酸烷氧烷基酰胺,其制备方法以及含有它们的除草剂组合物。新化合物的首选用途是选择性控制单子叶杂草。新化合物具有一般式I ##STR1## 其中"烷基"表示1至4个碳原子的直链或支链饱和碳氢链,R代表1至4个碳原子的烷基基团。新化合物通过将4-(对三氟甲基苯氧基)-α-苯氧基丙酸的卤化物或较低烷基酯与烷氧烷基胺H.sub.2 N-烷基氧-R反应,或者通过将羟基联苯醚 ##STR2## 其中Y为氢或阳离子,与式为##STR3## 的α-卤代丙酸烷氧烷基酰胺在酸受体存在下反应获得。式I的首选化合物为N-(2-甲氧基)-乙酰胺和N-(3-甲氧基)-丙基-(2)-酰胺。