申请人:Nakatani Masao
公开号:US20050215797A1
公开(公告)日:2005-09-29
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
1
represents a C1 to C6 alkyl group, R
2
represents a C1 to C3 haloalkyl group, R
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 α, or a formyl group, R
4
represents a hydrogen atom or a C1 to C3 haloalkyl group, provided that R
4
represents a C1 to C3 haloalkyl group in the case that R
3
is a hydrogen or a formyl group, and R
4
is a hydrogen group or a C1 to C3 haloalkyl group in the case that R
3
is a C1 to C3 alkyl group which may be substituted with one or more substituents selected from the following substituent group α.
本发明提供了吡唑衍生物,用作制备具有优异除草效果和作物与杂草之间选择性的异恶唑衍生物的生产中间体,以及制备它们的方法。发明化合物为吡唑衍生物或其药学上可接受的盐,其由通式[I]或其盐表示:其中,R1代表C1至C6烷基,R2代表C1至C3卤代烷基,R3代表氢原子,C1至C3烷基,其可以被以下取代基α中的一个或多个取代基取代,或者甲酰基,R4代表氢原子或C1至C3卤代烷基,前提是当R3为氢或甲酰基时,R4代表C1至C3卤代烷基,在R3为C1至C3烷基且可以被以下取代基α中的一个或多个取代基取代时,R4代表氢原子或C1至C3卤代烷基。