申请人:Ciba-Geigy Corporation
公开号:US04480101A1
公开(公告)日:1984-10-30
There are described novel intermediates for herbicides of the sulfonylurea class, which have the general formula I ##STR1## wherein E is nitrogen or the methine group, R.sub.1 is halogen, C.sub.1 -C.sub.4 -alkyl, 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 -haloalkyl, --NR.sub.3 R.sub.4 or alkoxyalkyl having at most 4 carbon atoms, and R.sub.2 is a group --G--CF.sub.2 --T, where G is oxygen or sulfur, T is hydrogen, --CHClF, --CHBrF, --CHF.sub.2 or --CHF--CF.sub.3, R.sub.3 is hydrogen, methyl or ethyl, and R.sub.4 is hydrogen, methyl, ethyl, methoxy, ethoxy or methoxymethyl, with the proviso that R.sub.1 is not C.sub.1 -C.sub.4 -alkyl when simultaneously E is nitrogen and G is oxygen.
描述了
磺酰脲类除草剂的新型中间体,其具有一般式I:##STR1## 其中E为氮或甲基组,R1为卤素,C1-C4烷基,C1-C4烷氧基,C1-C4卤代烷氧基,C1-C4烷基
硫基,C1-C4卤代烷基,--NR3R4或最多有4个碳原子的烷氧基烷基,R2为--G--
CF2--T基团,其中G为氧或
硫,T为氢,--CHClF,--
CHBrF,--
CHF2或--CHF--
CF3,R3为氢,甲基或乙基,R4为氢,甲基,乙基,甲氧基,乙氧基或甲氧基甲基,但R1不是C1-C4烷基,同时E为氮且G为氧。