| 摘要 |
Compounds of the formula <IMAGE> wherein R is halogen, preferably chlorine or bromine; C1-C4 alkoxy, preferably methoxy; nitro; cyano; -S(O)nR' wherein n is the integer 0, 1 or 2, preferably 2 and R' is C1-C4 alkyl, preferably methyl; or R is C1-C4 alkyl or methyl and most preferably R is chlorine, bromine, methoxy, nitro, methyl or CF3; R1 is hydrogen or C1-C4 alkyl; R2 is hydrogen, C1-C4 alkyl or <IMAGE> wherein Ra is C1-C4 alkyl; R1 and R2 together are alkylene having 3 to 6 carbon atoms; R3 is hydrogen or C1-C4 alkyl; R4 is hydrogen or C1-C4 alkyl; and R5 and R6 independently are (1) hydrogen; (2) halogen; (3) C1-C4 alkyl; (4) C1-C4 alkoxy; (5) OCF3; (6) cyano; (7) nitro; (8) C1-C4 haloalkyl; (9) RbSOn- wherein n is the integer 0, 1, or 2; and Rb is (a) C1-C4 alkyl; (b) C1-C4 alkyl substituted with halogen or cyano; (c) phenyl; or (d) benzyl; (10) -NRcRd wherein Rc and Rd independently are hydrogen or C1-C4 alkyl; (11) ReC(O)- wherein Re is C1-C4 alkyl or C1-C4 alkoxy; or (12) SO2NRcRd wherein Rc and Rd are as defined are effective as herbicides.
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