申请人:Mitsui Toatsu Chemicals, Incorporated
公开号:US05356866A1
公开(公告)日:1994-10-18
Furobenzopyran derivatives of the general formula (I): ##STR1## in which R.sup.1 is a lower alkyl group, R.sup.2 is a lower alkyl group, lower alkoxy group, halogen atom or lower alkyl group substituted by a halogen atom, R.sup.3 is a lower alkyl group, lower alkoxy group, halogen atom, lower alkyl group substituted by a halogen atom, phenoxy group or benzyloxy group, R.sup.4 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Furobenzopyran衍生物:##STR1##其中R.sup.1是较低的烷基,R.sup.2是较低的烷基,较低的烷氧基,卤素原子或被卤素原子取代的较低的烷基,R.sup.3是较低的烷基,较低的烷氧基,卤素原子,被卤素原子取代的较低的烷基,苯氧基或苄氧基,R.sup.4是氢原子或较低的烷基,m和n是0到4之间的任何整数,对杂草具有优异的除草活性,并对水稻、大豆和棉花等作物完全具有选择性。