Oxazole derivatives, process for producing the same, and herbicide

A compound of formula (I):

• ##STR63## wherein L represents a nitrogen atom, or a carbon atom;
• Z represents an oxygen atom, a sulfur atom, sulfinyl or sulfonyl;
• R.sub.1 and R.sub.2 represent each independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 haloalkoxy, C.sub.1 -C.sub.6 haloalkyl, C.sub.1 -C.sub.6 alkylamino, di-(C.sub.1 -C.sub.6 alkylamino), C.sub.1 -C.sub.6 alkylthio, halogen or cyano;
• R.sub.3 represents hydrogen, C.sub.1 -C.sub.6 alkyl, halogen, nitro, formyl or acyl;
• X represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl, benzyl optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenyl optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 a alkyl)amino or C.sub.1 -C.sub.6 acyl;
• C.sub.1 -C.sub.6 alkoxy C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylthio C.sub.1 -C.sub.6 alkyl, phenoxy C.sub.1 -C.sub.6 alkyl, phenylthio C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylsulfinyl C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylsulfonyl C.sub.1 -C.sub.6 alkyl, phenylsulfonyl C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkylsulfonyl C.sub.1 -C.sub.6 alkyl, cyano, C.sub.1 -C.sub.6 alkyl, halogen, nitro, amino, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl) amino, acylamino, C.sub.1 -C.sub.6 alkylsulfonylamino, formyl, C.sub.1 -C.sub.6 acyl, cyano, carboxyl, hydroxyl, C.sub.1 -C.sub.6 alkoxycarbonyl, C.sub.1 -C.sub.6 alkylthiocarbonyl, C.sub.1 -C.sub.6 acyl C.sub.1 -C.sub.6 alkoxymoyl, C.sub.1 -C.sub.6 acylimidoyl, carbamoyl, C.sub.1 -C.sub.6 alkoxy, C.sub.2 -C.sub.6 alkenyloxy, C.sub.3 -C.sub.6 alkynyloxy, C.sub.1 -C.sub.6 alkoxy C.sub.1 -C.sub.6 alkoxy, halo C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylsulfonyloxy, halo C.sub.1 -C.sub.6 alkylsulfonyloxy, C.sub.1 -C.sub.6 alkoxy substituted with C.sub.1 -C.sub.6 alkoxycarbonyl, thiol, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfonyl, C.sub.2 -C.sub.6 alkenylthio, C.sub.3 -C.sub.6 alkynylthio, acyloxy, carbamoyloxy, thiocarbamoyloxy, benzyloxy, phenoxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenylthio optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenylsulfonyloxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• benzoyloxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkylamino) or C.sub.1 -C.sub.6 acyl;
• phenylsulfonyl, benzoyl, hydroxymoyl, hydroxy C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkylsulfonyloxy, carbohydrazoyl;
• Y represents hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, C.sub.1 -C.sub.6 haloalkyl, benzyl optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenyl optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• C.sub.1 -C.sub.6 alkoxy C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylthio C.sub.1 -C.sub.6 alkyl, phenoxy C.sub.1 -C.sub.6 alkyl, phenylthio C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylsulfinyl C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylsulfonyl C.sub.1 -C.sub.6 alkyl, phenylsulfonyl C.sub.1 -C.sub.6 alkyl, cyano C.sub.1 -C.sub.6 alkyl, halogen, nitro, amino, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino, acylamino, C.sub.1 -C.sub.6 alkylsulfonylamino, formyl, C.sub.1 -C.sub.6 acyl, cyano, carboxyl, hydroxyl, C.sub.1 -C.sub.6 alkoxycarbonyl, C.sub.1 -C.sub.6 alkylthiocarbonyl, C.sub.1 -C.sub.6 acyl C.sub.1 -C.sub.6 alkoxymoyl, C.sub.1 -C.sub.6 acylimidoyl, carbamoyl, C.sub.1 -C.sub.6 alkoxy, C.sub.2 -C.sub.6 alkoxy, C.sub.2 -C.sub.6 alkenyloxy, C.sub.3 -C.sub.6 alkynyloxy, C.sub.1 -C.sub.6 alkoxy C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylsulfonyl C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkoxy substituted with C.sub.1 -C.sub.6 alkoxycarbonyl, C.sub.1 -C.sub.6 alkylsulfonyloxy, thiol, C.sub.1 -C.sub.6 alkylthio, C.sub.1 -C.sub.6 alkylsulfonyl, C.sub.2 -C.sub.6 alkenylthio, C.sub.3 -C.sub.6 alkynylthio, acyloxy, carbamoyloxy, thiocarbamoyloxy, benzyloxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl) amino or C.sub.1 -C.sub.6 acyl;
• phenoxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenylthio optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenylsulfonyloxy, benzoyloxy optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• phenylsulfonyl optionally substituted with halogen, C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkyl, nitro, cyano, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylamino, di(C.sub.1 -C.sub.6 alkyl)amino or C.sub.1 -C.sub.6 acyl;
• C.sub.1 -C.sub.6 alkyl, hydroxy C.sub.1 -C.sub.6 alkyl, halo C.sub.1 -C.sub.6 alkylsulfonyloxy, carbohydrazoyl or benzoyl;
• m represents an integer of 1 or 2, and n represents an integer of 1, 2, 3 or 4, and the salts thereof.