申请人:Schering Aktiengesellschaft
公开号:US04243409A1
公开(公告)日:1981-01-06
A 1,2,4-oxadiazole derivative of the formula ##STR1## in which R.sub.1 and R.sub.2 are the same or different and are C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, halogeno-C.sub.1 -C.sub.3 -alkyl, phenyl, or phenyl substituted in one or several places by C.sub.1 -C.sub.4 alkyl, and/or C.sub.1 -C.sub.4 -alkoxy and/or trihalogenomethyl and/or halogen and/or cyano or are phenyl-C.sub.1 -C.sub.3 -alkyl, provided that at least one of R.sub.1 or R.sub.2 is constituted by the group ##STR2## in which R.sub.3 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, halogeno-C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.4 -alkamino or di-C.sub.1 -C.sub.4 -alkamino. The compounds of the invention have a high activity against both mono- and di-cotyl weeds together with a high selectivity for agricultural plants such as rice, winter cereals, maize, cotton, sunflower, peanuts, soybeans, peas, alfalfa, clover and other leguminous plants. They may be applied in preemergence or postemergence application.
一种1,2,4-噁二唑衍生物的化学式如下:##STR1## 其中R.sub.1和R.sub.2相同或不同,为C.sub.1 -C.sub.8 -烷基,C.sub.3 -C.sub.8 -环烷基,卤代C.sub.1 -C.sub.3 -烷基,苯基,或苯基在一个或多个位置被C.sub.1 -C.sub.4 烷基,和/或C.sub.1 -C.sub.4 -氧烷基,和/或三卤代甲基,和/或卤素,和/或氰基取代,或者为苯基-C.sub.1 -C.sub.3 -烷基,前提是R.sub.1或R.sub.2中至少有一个由下列基团构成:##STR2## 其中R.sub.3为C.sub.1 -C.sub.8 -烷基,C.sub.3 -C.sub.8 -环烷基,卤代C.sub.1 -C.sub.3 -烷基,C.sub.1 -C.sub.6 -氧烷基,C.sub.1 -C.sub.4 -胺基或二C.sub.1 -C.sub.4 -胺基。本发明的化合物对一叶和二叶杂草均具有高活性,并对稻谷、冬季谷物、玉米、棉花、向日葵、花生、大豆、豌豆、苜蓿、三叶草和其他豆科植物等农作物具有高选择性。可以在出苗前或出苗后施用。