申请人:Ciba-Geigy Corporation
公开号:US05215570A1
公开(公告)日:1993-06-01
The N-acylsulfamoylphenylureas of formula I below are suitable as counter-agents (antidotes or safeners) for protecting cultivated plants from the phytotoxic action of herbicides. Suitable crops are preferably cereals, soybeans, sorghum, maize and rice, and suitable herbicides are sulfonylureas, chloroacetanilides and aryloxyphenoxypropionic acid derivatives. The N-acylsulfamoylphenylureas have the formula I ##STR1## wherein A is a radical selected from the group ##STR2## R.sub.1 is C.sub.1 -C.sub.4 -alkoxy or each of R.sub.1 and R.sub.2, independently of the other, is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.3 -C.sub.8 cycloalkyl, C.sub.3 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, ##STR3## or C.sub.1 -C.sub.4 alkyl substituted by C.sub.1 -C.sub.4 alkoxy or by ##STR4## or R.sub.1 and R.sub.2 together form a C.sub.4 -C.sub.6 alkylene bridge, or a C.sub.4 -C.sub.6 alkylene bridge interrupted by oxygen, sulfur, SO, SO.sub.2, NH or by --N(C.sub.1 -C.sub.4 alkyl)-, R.sub.3 is hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.a to R.sub.h, R.sub.x and R.sub.y are as defined in the disclosure.
下面的化学式I中的N-酰磺酰苯脲适用作对抗剂(解毒剂或安全剂),用于保护栽培植物免受除草剂的植物毒性作用。适宜的作物主要是谷物、大豆、高粱、玉米和稻米,适宜的除草剂是磺酰脲、氯乙酰苯胺和芳基氧基苯丙酸衍生物。N-酰磺酰苯脲的化学式I如下:其中A是从以下组中选择的基团,R.sub.1是C.sub.1 -C.sub.4 -烷氧基,或者R.sub.1和R.sub.2中的每一个独立地是氢、C.sub.1 -C.sub.8 烷基、C.sub.3 -C.sub.8 环烷基、C.sub.3 -C.sub.6 烯基、C.sub.3 -C.sub.6 炔基、或者C.sub.1 -C.sub.4 烷基被C.sub.1 -C.sub.4 烷氧基或者被R.sub.1和R.sub.2共同形成C.sub.4 -C.sub.6 烷基桥,或者被氧、硫、SO、SO.sub.2、NH或者--N(C.sub.1 -C.sub.4 烷基)-中断的C.sub.4 -C.sub.6 烷基桥,R.sub.3是氢或C.sub.1 -C.sub.4 烷基,R.sub.a到R.sub.h、R.sub.x和R.sub.y如披露中定义。