发明授权
US5883263A Preparation of substituted 3-aryl-5-haloalkyl-pyrazoles having
herbicidal activity
失效
具有除草活性的取代的3-芳基-5-卤代烷基 - 吡唑的制备
- 专利标题: Preparation of substituted 3-aryl-5-haloalkyl-pyrazoles having herbicidal activity
- 专利标题(中): 具有除草活性的取代的3-芳基-5-卤代烷基 - 吡唑的制备
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申请号: US943786申请日: 1997-10-03
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公开(公告)号: US5883263A公开(公告)日: 1999-03-16
- 发明人: Bruce C. Hamper , Michael K. Mao , Wendell Gary Phillips
- 申请人: Bruce C. Hamper , Michael K. Mao , Wendell Gary Phillips
- 申请人地址: MO St. Louis
- 专利权人: Monsanto Company
- 当前专利权人: Monsanto Company
- 当前专利权人地址: MO St. Louis
- 主分类号: C07C45/45
- IPC分类号: C07C45/45 ; C07C67/14 ; C07C69/738 ; C07D231/12 ; C07D231/16 ; C07D231/10 ; C07C49/78 ; C07C65/32
摘要:
Processes for preparing substituted 3-aryl-5-haloalkyl-pyrazoles and, specifically, for preparing C.sub.1-5 alkyl esters of 5-�1-(C.sub.1-5 alkyl)-4-halo-5-(C.sub.1-3 haloalkyl)-1H-pyrazole-3-yl!-2,4-dihalo-benzoic acids such as isopropyl 5-�4-bromo-1-methyl-5-(trifluoromethyl)-1H-pyrazole-3-yl!-2-chloro-4-fluorobenzoate, are presented. The described processes include novel approaches for forming phenyldiketones, forming and alkylating pyrazoles, brominating heterocyclic compounds, oxidizing alkyl-substituted benzene compounds, and esterifying carboxylic acids. These processes may be combined to prepare 3-aryl-5-haloalkyl pyrazoles, or alternatively, used in subcombinations or individually to prepare intermediates or other useful compounds.
公开/授权文献
- US5274658A Population inversion by excited energy level absorption 公开/授权日:1993-12-28