Pyrimidine derivatives

摘要

A pyrimidine herbicide derivative having the formula, <IMAGE> (1) wherein A is C3-C6 oxacycloalkyl, C3-C6 oxacycloalkyl substituted with at least one member selected from the group consisting of C1-C6 alkyl and halogen, C2-C6 oxacycloalkyl C1-C6 alkyl, C2-C6 oxacycloalkyl C1-C6 alkyl substituted with at least one member selected from the group consisting of C1-C6 alkyl and halogen, C3-C5 dioxacycloalykyl, C3-C5 dioxacycloalkyl substituted with at least one member selected from the group consisting of C1-C6 alkyl and halogen, C3-C5 dioxacycloalkyl C1-C6 alkyl or C3-C5 dioxacycloalkyl C1-C6 alkyl substituted with at least one member selected from the group consisting of C1-C6 alkyl and halogen; each of R1 and R2, which may be the same or different, is C1-C6 alkyl, C1-C6 alkoxy, halo C1-C6 alkoxy or halogen; X is oxygen or sulfur; Z is nitrogen or CY4; and Y1-4 are described in the specification.