Certain 2-(2-substituted benzoyl)-1,3-cyclohexanediones

摘要

Compounds of the formula <IMAGE> wherein 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; R5 is hydrogen or C1-C4 alkyl; R6 is hydrogen or C1-C4 alkyl; R7 is hydrogen or 3-C1-C4 alkoxy; and R8 is (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, their use as herbicides and herbicidal compositions containing the compounds.