申请人:Monsanto Company
公开号:EP0278944A1
公开(公告)日:1988-08-17
Disclosed herein are herbicidal pyridine compounds substituted at the 3- and/or 5-position with a carboxylic acid-derived heterocyclic moiety, as well as herbicidal compositions and use of these compounds.
The compounds have the formula:
wherein:
R3 is selected from the group consisting of 4,5-dihydro-2-oxazolyl; 2-oxazolyl; 2-thiazolyl; 4,5-dihydro-2-thiazolyl; 5,6-dihydro-4H-1,3-oxazin-2-yi; 5,6-dihydro-4H-1,3-thiazin-2-yl; 4,5-dihydro-1H-imidazol-2-yl; 2-oxazolidinyl; 1,3,4-oxadiazol-2-yl; 4,5-dihydro-1,3,4-oxadiazol-2-yl; 1,3-dithiolan-2-yl, 1,3-dithian-2-yl,2-thiazolidinyl, 1,3-dioxolan-2-yl, 1,3-dioxan-2-yl, 1,3-oxathi- olan-2-yl, 5-tetrazolyl, 5-oxazolyl, and the above mentioned heterocycles substituted with one or more substituents selected from lower alkyl, alkoxy and trifluoroacetyl, and 1-amino-4,5-dihydro-1H-imidazolyl;
R4 is selected from C1-C4 straight or branched chain alkyl, C3-C4 cycloalkyl, cycloalkylalkyl, alkylthioalkyl, and bis(alkylthio)alkyl;
R5 is the same as R3 or is
or -C≡N where Z1 is O, S, or NR7 where R7 Is lower alkyl, and 22 is selected from alkoxy, alkenoxy, alkynoxy, alkylthio, pyrazolyl, haloalkoxy, cyanoalkoxy, chloro, and -NHR8 where R8 is lower alkyl;
R2 and Re are independently selected from fluorinated methyl, chlorofluorinated methyl, chlorinated methyl and lower alkyl, provided that one of R2 and R6 must be fluorinated or chlorofluorinated methyl;
provided that R3 is not 4,5-dihydro-1-methyl-1H-imidazol-2-yl when Rs is methylthiocarbonyl, and R3 is not an unsubstituted 4,5-dihydro-1H-imidazol-2-yl when R5 is methoxycarbonyl.
本文公开了在 3-位和/或 5-位被羧酸衍生杂环分子取代的除草吡啶化合物,以及这些化合物的除草组合物和用途。
这些化合物的化学式如下
其中
5,6-dihydro-4H-1,3-thiazin-2-yl; 4,5-dihydro-1H-imidazol-2-yl; 2-oxazolidinyl; 1,3,4-oxadiazol-2-yl; 4,5-dihydro-1,3,4-oxadiazol-2-yl;1,3-二硫醇-2-基、1,3-二噻烷-2-基、2-噻唑烷基、1,3-二氧戊环-2-基、1,3-二氧杂环-2-基、1,3-氧硫杂环-2-基、5-四唑基、5-恶唑基,以及被一个或多个选自低 级烷基、烷氧基和三氟乙酰基的取代基取代的上述杂环,以及 1-氨基-4,5-二氢-1H-咪唑基;
R4 选自 C1-C4 直链或支链烷基、C3-C4 环烷基、环烷基烷基、烷硫基烷基和双(烷硫基)烷基;
R5 与 R3 相同或为
或-C≡N,其中 Z1 是 O、S 或 NR7(其中 R7 是低级烷基),22 选自烷氧基、烯氧基、炔氧基、烷硫基、吡唑基、卤代烷氧基、氰基烷氧基、氯和-NHR8(其中 R8 是低级烷基);
R2 和 Re 独立选自氟化甲基、氯氟化甲基、氯化甲基和低级烷基,但 R2 和 R6 中必须有一个是氟化甲基或氯氟化甲基;
条件是当 Rs 为甲基硫代羰基时,R3 不是 4,5-二氢-1-甲基-1H-咪唑-2-基;当 R5 为甲氧基羰基时,R3 不是未取代的 4,5-二氢-1H-咪唑-2-基。