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A process for producing 4-bromo-2-oxyimino butyric acid, predominantly as the (Z)-isomer of formula (I), wherein R is hydrogen ; a linear or branched C1-4 alkyl group; a linear or branched C1-4 alkyl group substituted by a carboxylic acid or an aryl group; a substituted or unsubstituted cyclic alkyl group of 3-6 carbon atoms or a substituted or unsubstituted aryl group. The product is produced by reacting bromine with a 2-(oxyimino)-3-oxo butyric acid derivative of formula (H) wherein R is as defined above and R1 is a tert-butyl group in presence of an organic solvent and in presence of a C1-4 alcohol and acetyl bromide at a temperature ranging from about -15° C to about +15° C. Bromine is used in a proportion of about 0.90 to about 1.35 moles per mole of compound (II), preferably 0.90 to 1.10 moles. The acetyl bromide is used in molar proportions of 0.9 to 2 moles per mole of compound (II), preferably 0.9 to 1.5 moles.
Notices, Deadlines & Correspondence
Patent Information
Applicants
LUPIN LTD.,
Inventors
1. KANSA,L VINOD KUMAR
2. RANE DNYANDEO RAGHO
3. DESHMUKH SANJAY
4. SINGH SANTOSH KUMAR
5. RICHARIA SANTOSH
6. ABRAHAM SUSAN AJAY
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 1124-mum-2001-form 3(26-11-2001).pdf | 2001-11-26 |
| 2 | 1124-MUM-2001-FORM 2(TITLE PAGE)-(26-11-2001).pdf | 2001-11-26 |
| 3 | 1124-mum-2001-form 2(26-11-2001).pdf | 2001-11-26 |
| 3 | 1124-mum-2001-claims(granted)-(30-8-2004).doc | 2018-08-08 |
| 5 | 1124-mum-2001-form 1(26-11-2001).pdf | 2001-11-26 |
| 6 | 1124-mum-2001-description(complete)-(26-11-2001).pdf | 2001-11-26 |
| 7 | 1124-mum-2001-claims(26-11-2001).pdf | 2001-11-26 |
| 9 | 1124-mum-2001-anexure(26-11-2001).pdf | 2001-11-26 |
| 10 | 1124-mum-2001-abstract(26-11-2001).pdf | 2001-11-26 |
| 12 | 1124-mum-2001-power of attorney(26-12-2001).pdf | 2001-12-26 |
| 13 | 1124-mum-2001-specification(amended)-(14-10-2002).pdf | 2002-10-14 |
| 14 | 1124-MUM-2001-FORM 1(14-10-2002).pdf | 2002-10-14 |
| 15 | 1124-mum-2001-claims(amended)-(14-10-2002).pdf | 2002-10-14 |
| 16 | 1124-mum-2001-cancelled pages(14-10-2002).pdf | 2002-10-14 |
| 17 | 1124-MUM-2001-CORRESPONDENCE-(RENEWAL PAYMENT LETTER)-30-10-2006.pdf | 2006-10-30 |
| 18 | 1124-MUM-2001-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(15-11-2012).pdf | 2012-11-15 |
| 19 | 1124-mum-2001-form 9(28-7-2004).pdf | 2018-08-08 |
| 20 | 1124-mum-2001-form 4(10-6-2003).pdf | 2018-08-08 |
| 21 | 1124-mum-2001-form 2(title page)-(granted)-(30-8-2004).pdf | 2018-08-08 |
| 22 | 1124-mum-2001-form 2(granted)-(30-8-2004).pdf | 2018-08-08 |
| 24 | 1124-mum-2001-form 1(31-1-2002).pdf | 2018-08-08 |
| 25 | 1124-mum-2001-description(granted)-(30-8-2004).pdf | 2018-08-08 |
| 26 | 1124-mum-2001-correspondence(ipo)-(5-11-2003).pdf | 2018-08-08 |
| 27 | 1124-MUM-2001-CORRESPONDENCE(IPO)-(13-3-2002).pdf | 2018-08-08 |
| 28 | 1124-mum-2001-correspondence(29-7-2004).pdf | 2018-08-08 |
| 29 | 1124-mum-2001-claims(granted)-(30-8-2004).pdf | 2018-08-08 |
| 31 | 1124-MUM-2001-ANNEXURE TO FORM 3(24-6-2002).pdf | 2018-08-08 |
| 32 | 192139- FORM 27- 2012.pdf | 2024-03-11 |