发明授权
- 专利标题: Process for preparing 1,3-disubstituted pyrazolecarboxylic esters
- 专利标题(中): 1,3-二取代吡唑羧酸酯的制备方法
-
申请号: US13054642申请日: 2009-07-10
-
公开(公告)号: US08344157B2公开(公告)日: 2013-01-01
- 发明人: Bernd Wolf , Sebastian Peer Smidt , Volker Maywald , Christopher Koradin , Michael Keil , Thomas Zierke , Michael Rack
- 申请人: Bernd Wolf , Sebastian Peer Smidt , Volker Maywald , Christopher Koradin , Michael Keil , Thomas Zierke , Michael Rack
- 申请人地址: DE Ludwigshafen
- 专利权人: BASF SE
- 当前专利权人: BASF SE
- 当前专利权人地址: DE Ludwigshafen
- 代理机构: Brinks Hofer Gilson & Lione
- 优先权: EP08160833 20080721
- 国际申请: PCT/EP2009/058854 WO 20090710
- 国际公布: WO2010/009990 WO 20100128
- 主分类号: C07D231/10
- IPC分类号: C07D231/10
摘要:
A process for preparing 1,3-disubstituted pyrazolecarboxylic esters of the formula (I) where X, Y, Z=hydrogen or halogen and R1=C1-C6-alkyl, by metering an enol ether of the formula III where R2 is C1-C6-alkyl at from (−41) to (−80)° C. into an alkyl hydrazine of the formula II H2N—NH-lower alkyl (II).
公开/授权文献
信息查询