Pyrazole derivatives and process for the production thereof
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United States of America Patent
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app pub date -
Jun 29, 2007
filing date -
Aug 1, 2002
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Abstract
The present invention provides pyrazole derivatives useful as production intermediates for isoxazoline derivatives having an excellent herbicidal effect and selectivity between crops and weeds as well as processes for producing the same. The pyrazole derivatives or pharmaceutically acceptable salts thereof which are inventive compounds are represented by the general formula [I] or a salt thereof: wherein R.sup.1 represents a C1 to C6 alkyl group, R.sup.2 represents a C1 to C3 haloalkyl group, R.sup.3 represents a hydrogen atom, a C1 to C3 alkyl group which may be substituted with one or more substituents selected from the following substituent group .alpha., or a formyl group, R.sup.4 represents a hydrogen atom or a C1 to C3 haloalkyl group, provided that R.sup.4 represents a C1 to C3 haloalkyl group in the case that R.sup.3 is a hydrogen or a formyl group, and R.sup.4 is a hydrogen group or a C1 to C3 haloalkyl group in the case that R.sup.3 is a C1 to C3 alkyl group which may be substituted with one or more substituents selected from the following substituent group .alpha..
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