Invention Grant
- Patent Title: Process for preparing 1,3-disubstituted pyrazolecarboxylic esters
- Patent Title (中): 1,3-二取代吡唑羧酸酯的制备方法
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Application No.: US13054642Application Date: 2009-07-10
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Publication No.: US08344157B2Publication Date: 2013-01-01
- Inventor: Bernd Wolf , Sebastian Peer Smidt , Volker Maywald , Christopher Koradin , Michael Keil , Thomas Zierke , Michael Rack
- Applicant: Bernd Wolf , Sebastian Peer Smidt , Volker Maywald , Christopher Koradin , Michael Keil , Thomas Zierke , Michael Rack
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Brinks Hofer Gilson & Lione
- Priority: EP08160833 20080721
- International Application: PCT/EP2009/058854 WO 20090710
- International Announcement: WO2010/009990 WO 20100128
- Main IPC: C07D231/10
- IPC: C07D231/10
Abstract:
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).
Public/Granted literature
- US20110118474A1 Process for preparing 1,3-disubstituted pyrazolecarboxylic esters Public/Granted day:2011-05-19
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