PYRAZOLE DERIVATIVES AND PROCESSES OF PREPARATION THEREOF

摘要

The invention relates to pyrazole derivatives useful as intermediates in the production of isoxazoline derivatives having excellent herbicidal activity and crops-weeds selectivity and a process for the production thereof. Pyrazole derivatives represented by the general formula [I] or pharmacologically acceptable salts thereof: [I] wherein R1 is C1-6 alkyl; R2 is C1-3 haloalkyl; R3 is hydrogen, C1-3 alkyl which may have one or more substituents selected from group of substituents, or formyl; and R4 is hydrogen or C1-3 haloalkyl (with the proviso that when R3 is hydrogen or formyl. R4 is C1-3 haloalkyl, while when R3 is C1-3 alkyl which may have one or more substituents selected from group of substituents, R4 is hydrogen or C1-3 haloalkyl).