申请人:Hoechst Schering AgrEvo GmbH
公开号:US05663118A1
公开(公告)日:1997-09-02
Fluoromethylsulfonyl-substituted pyridylsulfonylureas as herbicides, process for their preparation, and their use. Compounds of the formula (II) or salts thereof, ##STR1## R.sup.1 is hydrogen, methyl or ethyl, Z is CH or N and one of the radicals X and Y is halogen, (C.sub.1 -C.sub.2)alkyl, (C.sub.1 -C.sub.2)alkoxy, OCHF.sub.2 or CF.sub.3 and the other one of the radicals X and Y is (C.sub.1 -C.sub.2)alkyl, (C.sub.1 -C.sub.2)alkoxy or OCHF.sub.2, are suitable as selective herbicides for use in crops. They can be prepared by the process as claimed in claim 4, in which, in some cases, intermediates of the formula (III) are employed: ##STR2##
含氟甲基磺酰取代吡啶磺酰脲类除草剂,其制备方法及其用途。式(II)的化合物或其盐,其中,R1为氢、甲基或乙基,Z为CH或N,X和Y中的一个基团为卤素、(C1-C2)烷基、(C1-C2)烷氧基、OCHF2或CF3,另一个基团为(C1-C2)烷基、(C1-C2)烷氧基或OCHF2,适用于作物中的选择性除草剂。它们可以通过所声称的第4项要求的方法制备,其中,在某些情况下,采用式(III)的中间体:##STR2##