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,其化学式为##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上被C.sub.1-C.sub.4烷基,和/或C.sub.1-C.sub.4-烷氧基和/或三卤甲基和/或卤素和/或氰基取代,或为苯基-C.sub.1-C.sub.3-烷基,但至少R.sub.1或R.sub.2中的一个由以下基团构成:##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烷氧基,C.sub.1-C.sub.4烷基氨基或二C.sub.1-C.sub.4烷基氨基。本发明的化合物对单子叶和双子叶杂草均具有高活性,并对农作物如稻米、冬季谷物、玉米、棉花、向日葵、花生、大豆、豌豆、紫花苜蓿和其他豆科植物具有高选择性。它们可以在出苗前或出苗后施用。