Furobenzopyran derivatives of the general formula (I):
in which R¹ is a lower alkyl group, R² is a lower alkyl group, lower alkoxy group, halogen atom or lower alkyl group substituted by a halogen atom, R³ is a lower alkyl group, lower alkoxy group, halogen atom, lower alkyl group substituted by a halogen atom, phenoxy group or benzyloxy group, R⁴ is a hydrogen atom or lower alkyl group and m and n are any integers between 0 and 4, have an excellent herbicidal activity on weeds and are completely selective to crops such as paddy rice, soybeans and cotton.
通式(I)的
呋喃并
吡喃衍
生物:
其中 R¹ 是低级烷基,R² 是低级烷基、低级烷
氧基、卤素原子或被卤素原子取代的低级烷基,R³ 是低级烷基、低级烷
氧基、卤素原子、被卤素原子取代的低级烷基、
苯氧基或苄
氧基,R⁴ 是
氢原子或低级烷基,m 和 n 是 0 至 4 之间的任意整数,对杂草具有极佳的除草活性,对
水稻、大豆和棉花等作物具有完全的选择性。