| 摘要 |
<p>Trifluoromethanesulfonamide derivatives represented by general formula (I), herbicides containing them as effective ingredients, and a process for their preparation. In formula (I), 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 R?1, 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.</p> |
