申请人:Ciba-Geigy Corporation
公开号:US04540782A1
公开(公告)日:1985-09-10
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.
本文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是氮或甲基,R.sub.1是卤素,C.sub.1-C.sub.4-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-烷基硫基,C.sub.1-C.sub.4-卤代烷基,--NR.sub.3 R.sub.4或最多具有4个碳原子的烷氧基烷基,R.sub.2是一个基团--G--CF.sub.2--T,其中G是氧或硫,T是氢,--CHClF,--CHBrF,--CHF.sub.2或--CHF--CF.sub.3,R.sub.3是氢,甲基或乙基,R.sub.4是氢,甲基,乙基,甲氧基,乙氧基或甲氧甲基,但有条件是当同时E为氮且G为氧时,R.sub.1不是C.sub.1-C.sub.4-烷基。