申请人:Ciba-Geigy Corporation
公开号:US04530716A1
公开(公告)日:1985-07-23
The oxime ethers of the formula I below are able to act as antidotes or safeners to protect cultivated plants from the phytotoxic effects of herbicides. Such cultivated plants are preferably sorghum, cereals, maize and rice, and herbicides are principally chloroacetanilides and thiocarbamates. The oxime ethers have the formula I ##STR1## wherein n is 1 or 2, each of R.sub.1 and R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl each of R.sub.3 and R.sub.4 is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 haloalkylthio, C.sub.1 -C.sub.4 alkylsulfinyl, C.sub.1 -C.sub.4 alkylsulfonyl, C.sub.1 -C.sub.4 haloalkylsulfinyl, C.sub.1 -C.sub.4 haloalkylsulfonyl or nitro; each of R.sub.5 and R.sub.6 independently of the other is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.2 -C.sub.8 alkoxyalkyl, C.sub.3 -C.sub.4 alkenyl, C.sub.3 -C.sub.4 alkynyl, or together form a 2- to 6-membered alkylene or alkenylene bridge which may be substituted by 1 to 4 C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.2 -C.sub.4 alkenyloxy, C.sub.2 -C.sub.8 alkoxyalkyl or C.sub.3 -C.sub.8 alkenyloxyalkyl groups; each of A and B independently of the other is oxygen or sulfur, or one of A and B is the methine group, X is a fluorinated C.sub.1 -C.sub.3 alkyl radical which may also additionally contain chlorine, and Y is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkoxy or phenyl.
化学式I所示的肟醚能够作为解毒剂或安全剂,保护栽培植物免受除草剂的植物毒性影响。这种栽培植物主要是高粱、谷物、玉米和稻米,而除草剂主要是氯乙酰苯胺和硫代氨基甲酸酯。肟醚的化学式如下:其中n为1或2,R.sub.1和R.sub.2分别为氢或C.sub.1 -C.sub.4烷基,R.sub.3和R.sub.4分别为氢、卤素、C.sub.1 -C.sub.4烷基、C.sub.1 -C.sub.4卤代烷基、C.sub.1 -C.sub.4烷氧基、C.sub.1 -C.sub.4卤代烷氧基、C.sub.1 -C.sub.4烷硫基、C.sub.1 -C.sub.4卤代烷硫基、C.sub.1 -C.sub.4烷基亚砜、C.sub.1 -C.sub.4烷基砜、C.sub.1 -C.sub.4卤代烷基亚砜、C.sub.1 -C.sub.4卤代烷基砜或硝基;R.sub.5和R.sub.6中的每一个独立地为C.sub.1 -C.sub.4烷基、C.sub.1 -C.sub.4卤代烷基、C.sub.2 -C.sub.8烷氧基烷基、C.sub.3 -C.sub.4烯基、C.sub.3 -C.sub.4炔基,或者一起形成一个2-到6-成员的烷基或烯基桥,该桥可能被1至4个C.sub.1 -C.sub.4烷基、C.sub.1 -C.sub.4卤代烷基、C.sub.1 -C.sub.4烷氧基、C.sub.2 -C.sub.4烯氧基、C.sub.2 -C.sub.8烷氧基烷基或C.sub.3 -C.sub.8烯氧基烷基基团取代;A和B中的每一个独立地为氧或硫,或者A和B中的一个是亚甲基基团,X是氟化的C.sub.1 -C.sub.3烷基基团,也可能额外含有氯,Y为氢、C.sub.1 -C.sub.4烷基、C.sub.1 -C.sub.4卤代烷基、C.sub.1 -C.sub.4烷氧基、C.sub.1 -C.sub.4卤代烷氧基或苯基。