Use of 1-alkyl-3-phenylpyridinium salts as herbicides and herbicidal formulations containing the salts
申请人:ELI LILLY AND COMPANY
公开号:EP0006359A1
公开(公告)日:1980-01-09
Quaternary salts of formula (I):
wherein R represents methyl or ethyl;
R1 represents halo, methoxy, C,-C4 alkylthio, benzylthio or dimethylamino;
R2 represents hydrogen, phenoxy, phenylthio, C1-C4 alkyl, C1-C4 alkoxy, C,-C4 alkylthio, phenyl or phenyl monosubstituted with halo, trlfluoromethyl, C1-C4 alkyl or C,-C, alkoxy;
R3 represents C,-C4 alkyl, C,-C4 alkoxy, trifluormethyl or halo;
E represents an anion capable of forming a pyridinium salt; and
n represents an integer of 1 to 3, are useful herbicides. The compounds are prepared by alkylation of the appropriate pyridine, pyridinone or pyridinethione intermediate.
式(I)的季盐:
其中 R 代表甲基或乙基;
R1 代表卤素、甲氧基、C,-C4 硫代烷基、硫代苄基或二甲基氨基;
R2 代表氢、苯氧基、苯硫基、C1-C4 烷基、C1-C4 烷氧基、C,-C4 烷硫基、苯基或用卤素、三氟甲基、C1-C4 烷基或 C,-C,烷氧基单取代的苯基;
R3 代表 C,-C4烷基、C,-C4烷氧基、三氟甲基或卤素;
E 代表能够形成吡啶鎓盐的阴离子;以及
n 代表 1 至 3 的整数,这些都是有用的除草剂。这些化合物是通过对适当的吡啶、吡啶酮或吡啶硫酮中间体进行烷基化而制备的。