Invention Grant
US07939673B2 Process for preparing 3-dihalomethyl-pyrazole-4-carboxylic acid derivatives
有权
3-二卤甲基 - 吡唑-4-羧酸衍生物的制备方法
- Patent Title: Process for preparing 3-dihalomethyl-pyrazole-4-carboxylic acid derivatives
- Patent Title (中): 3-二卤甲基 - 吡唑-4-羧酸衍生物的制备方法
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Application No.: US12438732Application Date: 2007-08-22
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Publication No.: US07939673B2Publication Date: 2011-05-10
- Inventor: Sergi Pazenok , Lui Norbert , Arnd Neeff
- Applicant: Sergi Pazenok , Lui Norbert , Arnd Neeff
- Applicant Address: DE Monheim
- Assignee: Bayer CropScience AG
- Current Assignee: Bayer CropScience AG
- Current Assignee Address: DE Monheim
- Agency: Baker Donelson Bearman, Caldwell & Berkowitz, PC
- Priority: DE102006039909 20060825
- International Application: PCT/EP2007/007377 WO 20070822
- International Announcement: WO2008/022777 WO 20080228
- Main IPC: C07D231/10
- IPC: C07D231/10 ; C07C229/00
Abstract:
The invention relates to a process for preparing 3-dihalomethylpyrazole-4-carboxylic acid derivatives of the formula (I) by reacting α-fluoroamines of the formula (III) in the presence of Lewis acids with acrylic acid derivatives of the formula (II) to give vinamidinium salts of the formula (IV) and the subsequent reaction thereof with hydrazines, and to the vinamidinium salts of the formula (IV) themselves.
Public/Granted literature
- US20090326242A1 PROCESS FOR PREPARING 3-DIHALOMETHYL-PYRAZOLE-4-CARBOXYLIC ACID DERIVATIVES Public/Granted day:2009-12-31
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