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"Process For Purification Of 1 Methylpyrazole 4 Carboxylic Acid Esters"
Abstract: The present invention relates to improvements in processes towards the production 3- difluoromethyl-1 -methyl- 1 H-pyrazole-4-carboxylic acid, which is a useful intermediate in fungicide production. In particular, the invention relates to a process for treating a compound of formula III, wherein R1 is C1-C6 alkyl and R2 is CF3, CF2H or CFH2, comprising the steps of a) contacting a compound of formula III with base, and b) separating the compound of formula III and the base.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
12 October 2011
Publication Number
52/2012
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
Parent Application
Applicants
SYNGENTA LIMITED
EUROPEAN REGIONAL CENTRE, PRIESTLEY ROAD, SURREY RESEARCH PARK, GUILDFORD, SURREY GU2 7YH UNITED KINGDOM
Inventors
1. MCDOUGALD GRAHAM
SYNGENTA LIMITED, JEALOTT'S HILL INTERNATIONAL RESEARCH CENTRE, BRACKNELL, BERKSHIRE RG42 6EY UNITED KINGDOM
2. MUXWORTHY JAMES PETER
SYNGENTA LIMITED, JEALOTT'S HILL INTERNATIONAL RESEARCH CENTRE, BRACKNELL, BERKSHIRE RG42 6EY UNITED KINGDOM
3. WILDE BEVERLEY ANN
SYNGENTA LIMITED, JEALOTT'S HILL INTERNATIONAL RESEARCH CENTRE, BRACKNELL, BERKSHIRE RG42 6EY UNITED KINGDOM
Specification
NA
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 7849-delnp-2011-Form-18-(27-03-2012).pdf | 2012-03-27 |
| 1 | 7849-DELNP-2011_EXAMREPORT.pdf | 2016-06-30 |
| 2 | 7849-delnp-2011-Correspondance others-(27-03-2012).pdf | 2012-03-27 |
| 2 | 7849-delnp-2011-PCT-101.pdf | 2015-10-05 |
| 3 | 7849-delnp-2011-PCT-210.pdf | 2015-10-05 |
| 3 | 7849-delnp-2011-GPA.pdf | 2012-03-29 |
| 4 | 7849-delnp-2011-PCT-304.pdf | 2015-10-05 |
| 4 | 7849-delnp-2011-Form-5.pdf | 2012-03-29 |
| 5 | 7849-delnp-2011-Form-3.pdf | 2012-03-29 |
| 5 | 7849-delnp-2011-Correspondence others-(10-04-2012).pdf | 2012-04-10 |
| 6 | 7849-delnp-2011-Form-2.pdf | 2012-03-29 |
| 6 | 7849-delnp-2011-Form-1-(10-04-2012).pdf | 2012-04-10 |
| 7 | 7849-delnp-2011-Form-3-(10-04-2012).pdf | 2012-04-10 |
| 7 | 7849-delnp-2011-Form-1.pdf | 2012-03-29 |
| 8 | 7849-delnp-2011-Drawings.pdf | 2012-03-29 |
| 8 | 7849-delnp-2011-Abstract.pdf | 2012-03-29 |
| 9 | 7849-delnp-2011-Claims.pdf | 2012-03-29 |
| 9 | 7849-delnp-2011-Description (Complete).pdf | 2012-03-29 |
| 10 | 7849-delnp-2011-Correspondence-others.pdf | 2012-03-29 |
| 11 | 7849-delnp-2011-Claims.pdf | 2012-03-29 |
| 11 | 7849-delnp-2011-Description (Complete).pdf | 2012-03-29 |
| 12 | 7849-delnp-2011-Abstract.pdf | 2012-03-29 |
| 12 | 7849-delnp-2011-Drawings.pdf | 2012-03-29 |
| 13 | 7849-delnp-2011-Form-1.pdf | 2012-03-29 |
| 13 | 7849-delnp-2011-Form-3-(10-04-2012).pdf | 2012-04-10 |
| 14 | 7849-delnp-2011-Form-1-(10-04-2012).pdf | 2012-04-10 |
| 14 | 7849-delnp-2011-Form-2.pdf | 2012-03-29 |
| 15 | 7849-delnp-2011-Correspondence others-(10-04-2012).pdf | 2012-04-10 |
| 15 | 7849-delnp-2011-Form-3.pdf | 2012-03-29 |
| 16 | 7849-delnp-2011-Form-5.pdf | 2012-03-29 |
| 16 | 7849-delnp-2011-PCT-304.pdf | 2015-10-05 |
| 17 | 7849-delnp-2011-GPA.pdf | 2012-03-29 |
| 17 | 7849-delnp-2011-PCT-210.pdf | 2015-10-05 |
| 18 | 7849-delnp-2011-Correspondance others-(27-03-2012).pdf | 2012-03-27 |
| 18 | 7849-delnp-2011-PCT-101.pdf | 2015-10-05 |
| 19 | 7849-DELNP-2011_EXAMREPORT.pdf | 2016-06-30 |
| 19 | 7849-delnp-2011-Form-18-(27-03-2012).pdf | 2012-03-27 |