2 - [(1h-pyrazol-4-ylmethyl) -sulfonyl] -oxazole derivatives, 2 - [(1h-pyrazol-4-ylmethyl) -sulfanyl] -oxazole derivatives and 2 - [(1h-pyrazol-4-yl) derivatives Chiral 4-ylmethyl) sulfinyl] oxazole, processes for their production as well as their use as herbicides and plant growth regulators
2-[(1H-Pyrazol-4-yl-methyl)-sulfanyl]-oxazole derivatives (I) and their salts are new. 2-[(1H-Pyrazol-4-yl-methyl)-sulfanyl]-oxazole derivatives of formula (I) and their salts are new. R 1>；, R 2>；e.g. (1-6C)-alkyl, (1-6C)-alkylcarbonyl, (1-6C)-alkylcarbonyl-(1-4C)-alkyl, (1-6C)-alkylcarbonyloxy, (1-6C)-alkoxy, (1-6C)-alkoxycarbonyl (all optionally substituted), H, halo, nitro or CN； R 3>；-R 5>；e.g. (1-6C)-alkyl, (1-6C)-haloalkyl, (1-6C)-alkylcarbonyl, (1-6C)-haloalkylcarbonyl or (1-6C)-alkylcarbonyloxy, (1-6C)-haloalkylcarbonyloxy, (1-6C)-alkylcarbonyl-(1-4C)-alkyl or (1-6C)-haloalkylcarbonyl-(1-4C)-alkyl (all optionally substituted, where: the adjacent residues R 4>；and R 5>；are optionally cyclically bonded and/or forms (1-6C)alkylene group optionally containing O and/or S, and the (1-6C)-alkylene group is optionally substituted by halo), H, halo, OH, CN, nitro, amino, C(O)OH or formyl； and n : 0-2, preferably 1. Full Definitions are given in the DEFINITIONS (Full Definitions) Field. Independent claims are included for: (1) the preparation of (I)； (2) the preparation of thioether compound of formula (II), comprising (a) reacting 2-mercaptooxazole or an oxazol-2-(3H)-thione or its salt of formula (V), (Va), (Vb) or (Vc) with (1H-pyrazol-4-yl-methyl) derivative of formula (VI) in the presence of an alkali or alkaline earth metal base or an organic base in a solvent； or reacting an oxazole derivative of formula (VII) with [(1H-pyrazol-4-yl-methyl)]-imidothiocarbamate salt of formula (VIII), in stew procedure, in the presence of an aqueous alkali- or alkaline earth metal base or an alkali metal- or alkaline earth metal carbonate base and a solvent； or reacting (VII) with (1H-pyrazol-4-yl-methyl)mercaptane compound of formula (IX) in the presence of an alkali or alkaline earth metal base； or halogenating or nitrating an oxazole derivative of formula (X) to obtain (II) (in which R 1>；is halo or NO 2)； or reacting (1H-pyrazol-4-yl-methyl)disulfide derivativ
