Trifiuoromethanesuifonamide derivatives represented by general formula (I), herbicides containing them as effective ingredients, and a process for their preparation. In formula (1),
X represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or a haloalkyl group having 1 to 4 carbon atoms, n represents 1, 2, or 3, A represents (II), (III), (IV), (V) or (VI),
and R1, R2, R3, each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. These compounds are prepared by reacting a corresponding amine derivative with trifluoromethanesulfonyl halide or trifluoromethanesulfonic acid anhydride or by oxidizing a thiochroman ring-containing trifluoromethanesulfonamide derivative depending upon the kind of group A in the above general formula. These trifluoromethanesulfonamide derivatives are useful as herbicides and enable the removal of weed without exhibiting any phytotoxicity upon field crops. The derivatives are also utilized as plant growth regulators.
由通式(I)代表的三
氟甲磺酰
脲衍
生物、含有它们作为有效成分的
除草剂及其制备方法。在式(1)中
X 代表氢原子、卤素原子、具有 1 至 4 个碳原子的烷基或具有 1 至 4 个碳原子的卤代烷基,n 代表 1、2 或 3,A 代表(II)、(III)、(IV)、(V)或(VI)、
以及 R1、R2、R3 分别代表氢原子或具有 1 至 4 个碳原子的烷基。根据上述通式中基团 A 的种类,通过使相应的胺衍
生物与三
氟甲磺
酰卤或
三氟甲磺酸酐反应,或通过氧化含
硫铬环的三
氟甲磺酰胺衍
生物,可制备这些化合物。这些
三氟甲烷磺酰胺衍
生物可用作
除草剂,能除去杂草而不会对大田作物产生任何植物毒性。这些衍
生物还可用作
植物生长调节剂。