Sulfonamides, processes for their preparation, compositions containing said sulfonamides and a method for controlling the growth of vegetation
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0007687A1
公开(公告)日:1980-02-06
Compounds of the formula
and their agriculturally suitable salts wherein
Q is O, S or
R, Rz, R3, R4 and R6 are various organic groups, or in some cases H; R5 is H, CH3 or OCH3;
R1, is a pyrimidine or tirazine residue; and
W is O or S:
are useful for the regulation of plant growth and/or as pre-emergance or post-emergence herbicides.
The compounds can be prepared e.g. by reacting an appropriate benzenesulfonyl isocyanate or isothiocyanate with an appropriate aminopyrimidine or aminotriazine. The compounds can be formulated for agricultural use in conventional manner. Also the production of isocyanates of the formula
wherein the substituents R, R2 and R3 are previously defined, is described, which are used as raw material for the preparation of the compounds with the above-mentioned formula.
式中的化合物
及其农业上适用的盐类,其中
Q 是 O、S 或
R、Rz、R3、R4 和 R6 是各种有机基团,或在某些情况下是 H;R5 是 H、CH3 或 OCH3;
R1 是嘧啶或吡嗪残基;以及
W 是 O 或 S:
这些化合物可用于调节植物生长和/或作为芽前或芽后除草剂。
这些化合物可以通过适当的苯磺酰异氰酸酯或异硫氰酸酯与适当的氨基嘧啶或氨基三嗪反应来制备。这些化合物可按常规方法配制成农用制剂。也可生产式如下的异氰酸酯
其中的取代基 R、R2 和 R3 如前定义,可用作制备上述式化合物的原料。