Title:
ジフルオロメチルピラゾリルカルボキシレートの調製方法
Document Type and Number:
Japanese Patent JP2010508333
Kind Code:
A
Abstract:
The present invention relates to a process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylates of the formula I in which R1 is C1-C8-alkyl, C3-C8-cycloalkyl, C1-C4-alkoxy-C1-C4-alkyl, etc.; and R2 is hydrogen, C1-C4-alkyl, benzyl or phenyl, wherein a) a compound of the general formula II in which X is fluorine, chlorine or bromine, R1 has one of the meanings given above and R4 is C1-C8-alkyl, C3-C8-cycloalkyl, C2-C8-alkenyl, benzyl or phenyl, is reacted with a silane compound of the general formula R3nSiCl(4-n) in which n is 1, 2 or 3 and the substituents R3 are independently of one another selected from the group consisting of C1-C8-alkyl and phenyl and with a metal selected from the metals of groups 1, 2, 3, 4 and 12 of the Periodic Table of the Elements having a redox potential of less than −0.7 V, based on a normal hydrogen electrode (at 25° C. and 101.325 kPa); and b) the reaction mixture from step a) is reacted with a compound of the general formula III R2HN—NH2 (III) in which R2 has one of the meanings given above.
Inventors:
Scoop, martin
Rack, michael
Schmidt, Sebastian, Pale
Rail, sandra
Kyle, Michael
Dietz, Jochen
Reinheimer, Joachim
Grotte, thomas
Zielke, Thomas
Roman, Yang, Klaas
Rack, michael
Schmidt, Sebastian, Pale
Rail, sandra
Kyle, Michael
Dietz, Jochen
Reinheimer, Joachim
Grotte, thomas
Zielke, Thomas
Roman, Yang, Klaas
Application Number:
JP2009535085A
Publication Date:
March 18, 2010
Filing Date:
November 02, 2007
Export Citation:
Assignee:
BASF SE
International Classes:
C07D231/14; C07F7/18
Domestic Patent References:
| JPH07188260A | 1995-07-25 | |||
| JPH06505252A | 1994-06-16 | |||
| JPH07188260A | 1995-07-25 | |||
| JPH06505252A | 1994-06-16 |
Foreign References:
| WO2005123690A1 | 2005-12-29 | |||
| WO2005123690A1 | 2005-12-29 |
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Eiichi Arai
Ishii Teiji
Satoshi Fujita
Eiichi Arai