Herbicidal sulfonamides, preparation and use thereof, compositions containing them, intermediates therefor and preparation of such intermediates
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0023141A2
公开(公告)日:1981-01-28
Compounds of the formulae
and
wherein:
A is selected from certain substituted amino, haloalkoxy or aryloxy groups;
R1 is hydrogen, halogen, nitro or various organic groups;
R'1 is H, Cl, F, Br, CH3 or OCH3;
R, and R5 are independently H or CH3 but not both CH,;
R6 is a pyrimidyl or triazinyl residue which may be substituted;
W is oxygen or sulfur;
Z is CH or N;
X, and Y, are H, CH3 or various alkoxy groups, but cannot both be H; and
B is selected from various aliphatic or aromatic organic groups;
and their agriculturally suitable salts, exhibit potent herbicidal activity. Some may also exhibit plant growth regulant activity. The compounds (I) and (IA) can be formulated for use in conventional manner.
The compounds (I) can be made inter alia by reacting an isocyanate or isothiocyanate of general formula
with an amine HNR Rm. The compounds (I) can be converted into compounds (IA) by reacting an alkali metal or alkaline earth metal salt thereof with an appropriate halide BI or BBr.
The novel intermediates (IB) also form part of the invention. They can be made from the corresponding sulfonamide by various phosgenation reactions.
式中的化合物
和
其中
A 选自某些取代的氨基、卤代烷氧基或芳氧基基团;
R1 是氢、卤素、硝基或各种有机基团
R'1 是 H、Cl、F、Br、CH3 或 OCH3;
R,和 R5 独立地为 H 或 CH3,但不能同时为 CH,;
R6 是可被取代的嘧啶或三嗪残基;
W 是氧或硫
Z 是 CH 或 N;
X 和 Y 是 H、CH3 或各种烷氧基,但不能都是 H;以及
B 选自各种脂肪族或芳香族有机基团;
以及它们在农业上适用的盐类,具有强大的除草活性。有些化合物还具有植物生长调节活性。化合物(I)和(IA)可按常规方法配制使用。
化合物 (I) 的制备方法包括将通式为
与胺 HNR Rm 反应制得。化合物(I)可通过其碱金属盐或碱土金属盐与适当的卤化物 BI 或 BBr 反应转化为化合物(IA)。
新型中间体(IB)也是本发明的一部分。它们可以由相应的磺酰胺通过各种磷化反应制得。