This also relates to processes for preparing the compounds of formula (1), Intermediates used in the preparation of compounds of the formula (1), Methods to control plants and compositions comprising the compounds of formula (1).Claim 1: a compound of the formula (1) wherein R1 and R2 are independently Hydrogen, c1-4 alkyl, haloalquilo c1-4, Halo, cyano, Hydroxy, alkoxy c1-4, Alquiltio c1-4, aryl or aryl substituted by one to five R6, which may be the same or different or heteroaryl heteroaryl, or Replaced by one to five R6, which may be the same or different; R3 is Hydrogen, alkyl C1 - 10Haloalquilo alquenilo C1 - C2 - 4, 10, haloalquenilo alquinilo C2 C2 - 4, - 10, - 4 haloalquinilo C2, C3 C3 cicloalquil cycloalkyl - 10, 10 - 6 - alkoxy alkyl C1, C1 C1 - 6 - 10 - alkyl -, cianoalquil C1 - 10 10 - - - alcoxicarbonil C1 C1 alkyl - 6 -, N - alkyl c1-3 alkyl - Aminocarbonyl - C1 - 6 -, N, N - (c1-3 alkyl) - aminocarboni L - alkyl C1 - 6 -Aryl alkyl - or aryl - C1 - 6 - 6 C1 alkyl aryl - in which the rest is replaced by one to three R7, which may be identical or different, or heterociclil - C1 - 6 - alkyl or alkyl heterociclil - C1 - 6 - in which the rest heterociclilo is replaced by one to three R7, which may be the same or different; R4 is aryl or aryl substituted by one to five R8, which may be the same or differentOr or heteroaryl heteroaryl substituted by one to four R8, which may be the same or different; R5 is Hydroxy or a group that can be metabolized in a Hydroxy Group; each of R6, R7 and R8 is independently, halociano C1 alkyl, Nitro, - 10, - 4 alquenilo haloalquilo C1, C2 - 10 alquinilo C2 10, Hydroxy, alkoxy C1 - 10, haloalcoxi c1-4 alkoxy, C1 - C3 c1-4 alkyl, cycloalkyl - 7Cicloalcoxi C3 C3 - 7 - 7, cicloalquil c1-4 alkyl, alkoxy cicloalquil C1 - C3 - 7 - 4 - 6 - C1 alkyl carbonyl, Formilo (c1-4 alkoxy carbonyl) - 4 - Alquiltio alquilcarboniloxi C1, C1 -, 10 -, 4 - haloalquiltio C1, C1 alquilsulfinil haloalquilsulfinil C1 - - 10 -, 4 -, 10 - haloalquilsulfonil alquilsulfonil C1, C1 - 4 - AM No, alquilamino C1 - 10 -, di - alquilamino C1 - C10, alquilcarbonilamino C1 - 10 -Aryl or aryl substituted by one to three R13, which may be identical or different, or heteroaryl heteroaryl substituted by one to three R13, which may be identical or different, aryl alkyl - or aryl c1-4 alkyl C1 - 4 - aryl - in which the rest is replaced by one to three R13. May be equal to Or different- heteroaryl heteroaryl alkyl c1-4 alkyl - or - C1 - 4 - in which the rest is heteroaryl substituted by one to three R13, which may be identical or different, ariloxi - or ariloxi - replaced by one to three R13, which may be identical or different, heteroariloxi - substituted by one or heteroariloxi TR R13 is, which may be identical or different, ariltio - or ariltio - replaced by one to three R13,That may be the same or different, or heteroariltio - or heteroariltio - replaced by one to three R13, which may be identical or different, and each R13 is independently alkyl, cyano, Nitro, haloalquilo C1 C1 - 6, 6 - alkoxy - or C1 6 or a Salt or n-oxide thereof.Claim 7: a compound of the formula (2) in which R1, R2, and R4 are as defined in claim 1, and R16 is alkyl C1 - 6; or a Salt or n-oxide thereof.Claim 8: Another group are the compounds of formula (1) wherein R1, R2, and R4 are as defined in claim 1; R3 is alkyl alquenilo C1 - C2 - 10, 10, 10 alquinilo C2 - C3 - 10, cycloalkyl, cicloalquil C1 C3 alkyl - 6 - 10 - alkoxy alkyl C1, C1 - 6 - 10 -, 10 - alkoxy - cianoalquil C1, C1 - 10 - alkyl carbonyl - C1 - 6 -, N - alkyl c1-3 alkyl - Aminocarbonyl - C1 - 6 -, N,N - (Aminocarbonyl c1-3 alkyl) - C1 - 6 - alkyl -, aryl alkyl - or aryl - C1 - 6 - 6 C1 alkyl aryl - in which the rest is replaced by one to three R7, which may be the same or different alkyl or heterociclil - C1 - C6 or heterociclil C1 - alkyl - 6 - in which the rest heterociclilo is replaced by one Three R7, which may be the same or different alkyl; and R16 is C1 - 6 or a Salt or n-oxide thereof.
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