Pyrazole derivative and herbicide containing it

Abstract

A pyrazole derivative having the formula: ##STR1## wherein A is alkyl, alkenyl or alkynyl; B is hydrogen, alkyl, halogen, haloalkyl, alkoxy, alkylthio, alkoxyalkyl, alkylthioalkyl or alkoxycarbonyl; X is alkyl, alkoxy, halogen, nitro, cyano, haloalkyl, alkoxyalkyl, alkylcarbonyl, alkoxycarbonyl, aminocarbonyl substituted by hydrogen or alkyl, haloalkoxy, alkylthio or alkylthioalkyl; Y is --COOR1 (wherein R1 is hydrogen, alkyl, etc.), --COO--L--OR1 (wherein L is alkylene which may be substituted), --COO--L--R2 (wherein R2 is phenyl group which may be substituted), --COO--M (wherein M is 3 to 6-membered alicyclic residue containing not more than 2 sulfur or oxygen atoms), --COO--L--M, --COO--L--O--L--R2, --COO--L--S(O).sub.n --CON (R3) (R4) (wherein each of R3 and R4 is hydrogen, alkyl, etc.), a --CON--(CH.sub.2).sub.n, ##STR2## wherein R5 is alkyl), ##STR3## --CONHSO.sub.2 CH.sub.3, --CONHSO.sub.2 CF.sub.3, --COO--L--N(R3) (R4), --COO--L--CO--R1, --COO--L--CO--O--R1, --COO--L--CN, --Coo--L--NO.sub.2 --COOSi (R5).sub.3, --COO--N.dbd.(R6) (R7) (wherein each of R6 and R7 is alkyl), --COO--N.dbd.C--(CH.sub.2).sub.n, --COO--L--O--SO.sub.2 --R1, --Coo--L--O--CO--R1, --COO--L--O--L--O--R1, --COO--L--Si (R5).sub.3, --C(O)S--R1, --C(S)O--R1, --C(S)S--R1, --L--O--R1, --L--O--L--O--R8 (wherein R8 is hydrogen or alkyl), --L--O--M, --L--O--L--M, --L--NR8R9 (wherein R9 is alkyl group), --L--O--CH.sub.2 Ph, --L--O--L--COOR9, --L--CN, --L--S(O).sub.n --R1, --L--S--L--O--R9, --L--O--COR9, --L--O--SO.sub.2 R9, --L--COOR8, --C.dbd.CHOR8 or --L--O--L--CN; Z is halogen, nitro, alkoxy, trifluoromethyl, cyano or --S(O).sub.n R10 (wherein R10 is alkyl or haloalkyl); V is a hydrogen atom, a halogen atom, an alkyl group having from 1 to 4 carbon atoms or an alkoxy group having from 1 to 4 carbon atoms; W is a hydrogen atom, a halogen atom, an alkyl group having from 1 to 4 carbon atoms, a haloalkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an alkoxyalkyl group having from 2 to 6 carbon atoms, an alkoxycarbonyl group having from 2 to 5 carbon atoms, a haloalkoxy group having from 1 to 3 carbon atoms, a nitro group, a cyano group or a --S(O).sub.n --R group (wherein n is as defined above and R is an alkyl group having from 1 to 4 carbon atoms); Q is hydrogen, alkyl, alkenyl, alkynyl, cyanomethyl, --C(O)--R11 (wherein R11 is phenyl group which may be substituterd, alkyl, alkoxy or hydroxyl), --S(O).sub.2 R11, --P(O) (OR11).sub.2 --L--C(O)--R11, --L--C(O)--N (R12) (R13) (wherein each of R12 and R13 is hydrogen or alkyl), --L--R14 (wherein R14 is phenyl which may be substituted, alkyl, alkoxy or hydroxy), --L--N(R12) (R13), a --L--OR15 (wherein R15 is hydrogen, alkyl or alkenyl), --L--OC(O)R16 (wherein R16 is alkyl or alkoxy), --L--S(O).sub.n R15, --L--SC(O)R12, ##STR4## wherein each of L1 and L2 is methylene, oxygen is sulfur and R16 is hydrogen or alkyl), and a salt thereof, useful as a herbicide.