A compound of the formula: ##STR1## wherein R.sup.1 is a trifluoromethyl group or a pentafluoroethyl group, R.sup.2 is a methyl group or an amino group, R.sup.3 is a C.sub.1 -C.sub.7 alkyl group, a C.sub.3 -C.sub.7 alkenyl group, a C.sub.3 -C.sub.7 alkynyl group, a halo (C.sub.1 -C.sub.6) alkyl group, a halo (C.sub.3 -C.sub.6) alkenyl group or a C.sub.1 -C.sub.4 alkoxy(C.sub.1 -C.sub.3)alkyl group and Y is an oxygen atom or a sulfur atom, which is useful as a herbicide.
一种化合物的
化学式为:##STR1## 其中 R.sup.1 是三
氟甲基基团或五
氟乙基基团,R.sup.2 是甲基基团或
氨基基团,R.sup.3 是 C.sub.1-C.sub.7 烷基基团、C.sub.3-C.sub.7 烯基基团、C.sub.3-C.sub.7 炔基基团、卤代 (C.sub.1-C.sub.6) 烷基基团、卤代 (C.sub.3-C.sub.6) 烯基基团或 C.sub.1-C.sub.4 烷氧基 (C.sub.1-C.sub.3) 烷基基团,而 Y 是氧原子或
硫原子。该化合物可用作
除草剂。