Substituted methanephosphonic acid derivatives of formula (I) or (II)
or
wherein R is (a) a group R1O in which R1 is H, a cation, or an ester radical, or (b) a group R2R3N- wherein R2 is H, or optionally substituted alkyl, alkenyl, or alkynyl; R3 is defined as for R2 or may also be a phenyl or acyl group; or R2 and R3, together with the nitrogen atom to which they are attached form a heterocyclic ring; R4 is H or a cation; R5 is H, a cation or an alkyl group; and R6 is hydrogen or an optionally substituted alkyl, alkenyl or alkynyl radical. These compounds are useful as broad-spectrum herbicides.
式(I)或(II)的取代的
甲烷膦酸衍
生物,或其中 R 是(a)基团 R1O,其中 R1 是 H、阳离子或酯基,或(b)基团 R2R3N-,其中 R2 是 H 或任选取代的烷基、烯基或炔基;R3 的定义与 R2 相同,或也可以是苯基或酰基;或 R2 和 R3 与它们所连接的氮原子一起形成杂环;R4 是 H 或阳离子;R5 是 H、阳离子或烷基;R6 是氢或任选取代的烷基、烯基或炔基。 这些化合物可用作广谱
除草剂。