Chemical compounds

Use of a compound of formula (I)

• or salt or N-oxide thereof,
• wherein:
• A is halogen, optionally substituted alkyl, optionally substituted alkenyl, or an optionally substituted 3-8 membered ring optionally containing up to 4 heteroatoms;
• R5 is hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, formyl, optionally substituted alkylcarbonyl, optionally substituted cycloalkylcarbonyl, optionally substituted alkenylcarbonyl, optionally substituted alkynylcarbonyl, optionally substituted phenylcarbonyl, optionally substituted heteroarylcarbonyl, optionally substituted aminocarbonyl, optionally substituted alkoxycarbonyl, optionally substituted alkylsulphonyl, optionally substituted cycloalkylsulphonyl, optionally substituted alkenylsulphonyl, optionally substituted alkynylsulphonyl, optionally substituted phenylsulphonyl, optionally substituted amino, hydroxyl, optionally substituted alkoxy, optionally substituted cycloalkoxy, optionally substituted alkylcarbonyloxy, optionally substituted alkoxycarbonyloxy, optionally substituted aminocarbonyloxy, optionally substituted phenoxy, optionally substituted phenyl, optionally substituted heteroaryl, optionally substituted alkenyl, optionally substituted alkynyl, N=CRgRh, cyano, optionally substituted silyl, or optionally substituted phosphonyl;
• Rg is hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted phenyl, optionally substituted heteroaryl, optionally substituted amino, optionally substituted alkoxy, optionally substituted phenoxy, optionally substituted alkylthio, or optionally substituted phenylthio;
• Rh is optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted phenyl, optionally substituted heteroaryl, optionally substituted amino, optionally substituted alkoxy, or optionally substituted alkylthio;
• or Rg and Rh together with the C atom to which they are joined form an optionally substituted ring;
• W is a direct bond, an optionally substituted alkylene chain, an optionally substituted alkenylene chain, or an optionally substituted alkynylene chain;
• Q is an optionally substituted 3-8 membered ring optionally containing up to 4 heteroatoms;
• Y is halogen, cyano, nitro, hydroxyl, optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted phenyl, optionally substituted heteroaryl, optionally substituted alkoxy, optionally substituted amino, optionally substituted alkylthio, optionally substituted alkylsulphinyl, optionally substituted alkylsulphonyl, optionally substituted dialkyl phosphonyl, optionally substituted trialkylsilyl;
• Z is (T)m-(U)n—V;
• wherein
• m is an integer of 0 to 1;
• n is an integer from 0 to 3, and n≧m;
• T is an oxygen or sulphur atom;
• U is CRwRx;
• each Rw is independently hydrogen, halogen, hydroxyl, optionally substituted alkyl, optionally substituted alkoxycarbonyl, or ORy and each Ry is independently an optionally substituted alkyl or an optionally substituted alkylcarbonyl;
• each Rx is independently hydrogen, halogen, optionally substituted alkyl, ORZ, and each RZ is independently an optionally substituted alkyl group;
• or any geminal Rw and Rx together form a group selected from oxo, or ═NORca, wherein Rca is hydrogen or optionally substituted alkyl;
• or any geminal, vicinal or non-adjacent Rw and/or Rx together with the C atom(s) to which they are attached and any intervening atom form an optionally substituted 3-6 membered ring;
• or wherein when at least one Rw is ORy and at least one Rx is ORZ, said ORy and ORZ groups together with the C atom(s) to which they are attached and any intervening atom form an optionally substituted 5-6 membered heterocyclic ring;
• V is C(O)Rcb, C(S)Rcd, C(═NRce)Rcf, CHRcgRch, CH(S[O]pRci)(S[O]qRcj), CRckRclRcm, or CH2ORcn;
• Rcb is hydrogen, hydroxyl, optionally substituted alkoxy, optionally substituted cycloalkoxy, optionally substituted alkylthio, or optionally substituted amino;
• Rcd is optionally substituted alkoxy, optionally substituted cycloalkoxy, optionally substituted alkylthio, or optionally substituted amino;
• Rce is hydrogen, optionally substituted alkyl, optionally substituted alkoxy, optionally substituted cycloalkoxy, or optionally substituted amino;
• Rcf is hydrogen, optionally substituted alkoxy, optionally substituted cycloalkoxy, optionally substituted alkylthio, or optionally substituted amino;
• Rcg and Rch are each independently an optionally substituted alkoxy group;
• or Rcg and Rch, together with the carbon to which they are joined, form a dioxolane or dioxane ring, which ring is optionally substituted;
• Rci and Rcj are each independently an optionally substituted alkyl group;
• or Rci and Rcj, together with the carbon and sulphur atoms to which they are joined, form an optionally substituted 5-6 membered ring;
• p and q are each independently an integer of 0,1, or 2
• Rck, Rcl, and Rcm are each independently an optionally substituted alkoxy group;
• or Rck and Rcl and Rcm together with the carbon to which they are attached form an optionally substituted trioxabicyclo[2.2.2]octane ring system;
• and Rcn is hydrogen or an optionally substituted alkylcarbonyl group, as a herbicide.