Compounds of the formula I
wherein R¹, R², R³, R⁴, and R⁵, which may be the same or different, each independently is a hydrogen atom, or an alkyl group containing 1 to 5 carbon atoms optionally substituted by one or more halogen atoms having an atomic number of from 9 to 35; or R³, R⁴ and R⁵ are additionally selected from an alkenyl or alkynyl group containing 2 to 4 carbon atoms and an optionally substituted mono or bicyclic cycloaliphatic or aryl group containing 6 to 10 carbon atoms; or R³ and R⁴ together with the carbon atom to which they are attached form a cycloaliphatic ring containing 5 or 6 ring carbon atoms; and R is selected from an unsaturated hydrcarbon group containing 2 to 4 carbon atoms, an aromatic group containing up to 14 carbon atoms, a heterocyclic group having one or two heteroatoms each selected from 0, S or N and containing up to 14 carbon atoms or N-oxide or acid addition salt of an N-heterocyclic group, a cyano group, a cycloalkenyl group containing 5 to 7 carbon atoms and a cycloalkyl group containing 3 to 10 carbon atoms, which groups are optionally substituted, are useful as herbicides.
式 I 的化合物
其中 R¹、R²、R³、R⁴ 和 R⁵(可以相同或不同)各自独立地为氢原子或含有 1 至 5 个碳原子的烷基,可任选被一个或多个原子序数为 9 至 35 的卤原子取代;或 R³、R⁴ 和 R⁵ 另外选自含 2 至 4 个碳原子的烯基或炔基和任选被取代的含 6 至 10 个碳原子的单环或双环环脂族或芳基;或 R³ 和 R⁴ 与它们所连接的碳原子一起形成含 5 或 6 个环碳原子的环脂族环;和 R 选自含 2 至 4 个碳原子的不饱和碳氢基团、含多达 14 个碳原子的芳香基团、具有一个或两个杂原子且各杂原子选自 0、S 或 N 并含多达 14 个碳原子的杂环基团或 N-杂环基团的 N-氧化物或酸加成盐、
氰基、含 5 至 7 个碳原子的环烯基和含 3 至 10 个碳原子的环烷基,这些基团被任选取代,可用作
除草剂。