Triazine herbicidal compounds

A compound of formula (I) or an agronomically acceptable salt thereof:

• wherein
• each X1, X2 and X3 is independently selected from oxygen and sulfur;
• wherein
• each X1, X2 and X3 is independently selected from oxygen and sulfur;
• Y is C—H or nitrogen;
• B is selected from O, S and NR5;
• D is a group (CR6R7)n;
• n is an integer from 1 to 4;
• R1 is selected from hydrogen and C1-C6alkyl;
• R2 is selected from hydrogen, amino, C1-C6alkyl, C3-C6alkenyl and C3-C6alkynyl;
• R3 is selected from hydrogen, halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, C1-C4alkylthio and C1-C4alkylsulfonyl;
• R4 is selected from hydrogen, halogen, cyano, nitro, aminocarbonyl, aminothiocarbonyl, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy and C1-C4alkylsulfonyl;
• R5 is selected from hydrogen, hydroxy, C1-C6alkyl and C1-C4alkoxy;
• each R6 and R7 is independently selected from hydrogen, halogen, C1-C6alkyl, C1-C6haloalkyl, hydroxy, C1-C4alkoxy, C1-C4alkoxycarbonyl and CH2OR12;
• provided that R6 and R7 are not both hydroxy on the same carbon atom;
• or two groups R6 and R7, on the same or different carbon atoms, together form a C1-C5alkylene chain, which contain 0, 1 or 2 oxygen atoms, substituted by 1-3 groups R15;
• or when n is 1, R6 and R7, together with the carbon atom to which they are attached form a C2alkene;
• R8 is selected from OR9, SR9 and NR10R11;
• R9 is selected from hydrogen, C1-C10alkyl, C1-C10haloalkyl, C3-C6alkenyl, C3-C6haloalkenyl, C3-C6alkynyl, C1-C4alkoxyC1-C6alkyl, C1-C4haloalkoxyC1-C6alkyl, C6-C10arylC1-C3alkyl, C6-C10arylC1-C3alkyl substituted by 1-4 groups R13, heteroarylC1-C3alkyl and heteroarylC1-C3alkyl substituted by 1-3 groups R13;
• R10 is selected from hydrogen, C1-C6alkyl and SO2R14;
• R11 is selected from hydrogen and C1-C6alkyl;
• or
• R10 and R11 together with the nitrogen to which they are attached form a 3- to 6-membered heterocyclyl ring, which optionally contains an oxygen atom;
• R12 is selected from hydrogen, C1-C4alkyl and C1-C4alkylcarbonyl;
• each R13 is independently selected from halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, cyano and C1-C4alkylsulfonyl;
• R14 is selected from C1-C4alkyl, C1-C4haloalkyl, and C1-C4alkyl(C1-C4alkyl)amino;
• and
• each R15 is independently selected from hydrogen, halogen, C1-C4alkyl and C1-C4haloalkyl.