申请人:Ciba-Geigy Corporation
公开号:US04391624A1
公开(公告)日:1983-07-05
The present invention relates to novel herbicidal and plant growth-inhibiting 2-substituted 5-phenoxyphenylphosphonic acid derivatives of the formula ##STR1## wherein each of R.sub.1 and R.sub.2 independently is hydroxyl, lower alkoxy, lower alkylthio, alkylamino, dialkylamino, chlorine, benzyloxy or benzylthio, X is halogen or a --CF.sub.3, --NO.sub.2, --CN, --CONH.sub.2 or --CSNH.sub.2 group, n is 0 to 3, and Y is --OH, halogen, NO.sub.2, --CN, NH.sub.2, --NHCO--R, --NHCOOR or --NH--SO.sub.2 --R, wherein R is an unsubstituted or halogenated lower alkyl radical. Preferred compounds are 2-nitro-5-(2'-chloro-4'-trifluoromethylphenoxy)-phenylphosphonic acid and the lower dialkyl esters thereof. The invention also relates to the production of the novel phosphonic acid derivatives, starting from a 3,4-dinitrodiphenyl ether and reacting it with a trialkylphosphite as first step. The invention further relates to herbicidal and plant growth-regulating compositions which contain one of the novel compounds as active component, and also to the use of these compounds and compositions for controlling weeds (also selectively), for inhibiting plant growth and desiccating parts of plants above the soil, as well as for totally destroying existing plant growth.
本发明涉及一种新型的除草和抑制植物生长的2-取代的5-苯氧基苯基膦酸衍生物,其化学式为##STR1## 其中R.sub.1和R.sub.2各自独立地为羟基、低级烷氧基、低级烷基硫醚、烷基氨基、二烷基氨基、氯、苄氧基或苄硫醚,X为卤素或--CF.sub.3、--NO.sub.2、--CN、--CONH.sub.2或--CSNH.sub.2基团,n为0到3,Y为--OH、卤素、NO.sub.2、--CN、NH.sub.2、--NHCO--R、--NHCOOR或--NH--SO.sub.2--R,其中R为未取代或卤代的低级烷基基团。优选化合物为2-硝基-5-(2'-氯-4'-三氟甲基苯氧基)-苯基膦酸及其低级二烷酯。本发明还涉及从3,4-二硝基二苯醚开始,将其与三烷基膦酸酯反应作为第一步制备新型膦酸衍生物的方法。本发明还涉及含有新型化合物作为活性成分的除草和植物生长调节组合物,以及使用这些化合物和组合物来控制杂草(也具有选择性)、抑制植物生长和干燥地上部分植物,以及完全摧毁现有的植物生长。