| abstract |
A pyridine derivative having the formula:n wherein one of A, B, D and E is oxygen, sulfur, -SO-, -SO 2 -,n with the rest being all carbon atoms: X is halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, C 1 -C 4 haloalkyl, C 1 -C 4 haloalkoxy, C 1 -C 4 alkylthio, C 1 -C 4 haloalkylthio, C 1 -C 4 alkoxycarbonyl, Ci-C 4 alkylthioalkyl, tetrahydrothiopyranyl, hydroxyl, CF 3 , phenyl or pyridyl; n is an integer of from 0 to 6,; W is oxygen or sulfur; R is hydrogen, di-lower alkylimino, C 1 -C 5 alkyl, C 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 4 or C 5 oxacycloalkyl, C 2 -C 5 mono-, di- or tri-haloalkenyl, C 2 -C 5 haloalkynyl, glycidyl, furfuryl, alkylthioalkyl, C 3 -C 6 cycloalkyl or a cation R 1 is C 1 -C 4 alkyl, R 2 is C 1 -C 4 alkyl or C 3 -C 6 cycloalkyl, or R 1 and R 2 together with the adjacent carbon atom, form C 3 -C 6 cycloalkyl; and R 3 is hydrogen or C 1 -C 3 alkyl. |