A compound of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom, a fluorine atom or a methyl group and R.sub.2 is a C.sub.1 -C.sub.3 alkyl group, a C.sub.1 -C.sub.5 alkoxy group, a chloro(C.sub.2 -C.sub.4)alkoxy group, a dichloro(C.sub.2 -C.sub.4)alkoxy group, a cyclo(C.sub.3 -C.sub.7)alkoxy group, a phenoxy group, a C.sub.1 -C.sub.5 alkylthio group or a di(C.sub.1 -C.sub.5)alkylamino group, which is useful as a herbicide.
一种化合物的公式为:##STR1## 其中 R.sub.1 是氢原子、
氟原子或甲基基团,R.sub.2 是C.sub.1-C.sub.3烷基基团、C.sub.1-C.sub.5烷氧基团、
氯代(C.sub.2-C.sub.4)烷氧基团、二
氯代(C.sub.2-C.sub.4)烷氧基团、环(C.sub.3-C.sub.7)烷氧基团、苯氧基团、C.sub.1-C.sub.5烷基
硫基团或双(C.sub.1-C.sub.5)烷基
氨基团,可用作
除草剂。