A compound of the formula: ##STR1## wherein R is a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group, a C.sub.3 -C.sub.4 alkenyl group, a C.sub.3 -C.sub.4 alkynyl group, a halo(C.sub.1 -C.sub.4)alkyl group, a halo(C.sub.3 -C.sub.4)alkenyl group, a halo(C.sub.3 -C.sub.4)alkynyl group, a C.sub.1 -C.sub.2 alkoxy(C.sub.1 -C.sub.2)alkyl group, a C.sub.1 -C.sub.2 alkoxy(C.sub.1 -C.sub.2)alkoxy(C.sub.1 -C.sub.2)alkyl group, a cinnamyl group, a cyano(C.sub.1 -C.sub.3)alkyl group, a carboxy(C.sub.1 -C.sub.3)alkyl group, a C.sub.1 -C.sub.5 alkoxycarbonyl(C.sub.1 -C.sub.3)alkyl group, a halo(C.sub.1 -C.sub.5)alkoxycarbonyl(C.sub.1 -C.sub.3)alkyl group, a C.sub.1 -C.sub.2 alkoxy(C.sub.1 -C.sub.2)alkoxycarbonyl(C.sub.1 -C.sub.3)alkyl group, a C.sub.1 -C.sub.5 alkoxycarbonyl(C.sub.1 -C.sub.2)alkoxycarbonyl(C.sub.1 -C.sub.3)alkyl group, a cyclo(C.sub.3 -C.sub.6)alkoxycarbonyl(C.sub.1 -C.sub.3)alkyl group, a C.sub.1 -C.sub.5 alkylaminocarbonyl(C.sub.1 -C.sub. 3)alkyl group or a di(C.sub.1 -C.sub.5)alkylaminocarbonyl(C.sub.1 -C.sub.3)alkyl group, which is useful as a herbicide.
一种化合物的
化学式:##STR1## 其中R是氢原子、C.sub.1-C.sub.5烷基、C.sub.3-C.sub.4烯基、C.sub.3-C.sub.4炔基、卤代(C.sub.1-C.sub.4)烷基、卤代(C.sub.3-C.sub.4)烯基、卤代(C.sub.3-C.sub.4)炔基、C.sub.1-C.sub.2烷氧基(C.sub.1-C.sub.2)烷基、C.sub.1-C.sub.2烷氧基(C.sub.1-C.sub.2)烷氧基(C.sub.1-C.sub.2)烷基、肉桂基、
氰基(C.sub.1-C.sub.3)烷基、羧基(C.sub.1-C.sub.3)烷基、C.sub.1-C.sub.5烷氧羰基(C.sub.1-C.sub.3)烷基、卤代(C.sub.1-C.sub.5)烷氧羰基(C.sub.1-C.sub.3)烷基、C.sub.1-C.sub.2烷氧基(C.sub.1-C.sub.2)烷氧羰基(C.sub.1-C.sub.3)烷基、C.sub.1-C.sub.5烷氧羰基(C.sub.1-C.sub.2)烷氧羰基(C.sub.1-C.sub.3)烷基、环(C.sub.3-C.sub.6)烷氧羰基(C.sub.1-C.sub.3)烷基、C.sub.1-C.sub.5烷基
氨羰基(C.sub.1-C.sub.3)烷基或二(C.sub.1-C.sub.5)烷基
氨羰基(C.sub.1-C.sub.3)烷基,其作为
除草剂有用。