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Process For The Preparation Of Azithromycin Monohydrate Isopropanol Clathrate
The present invention relates to an improved, cost effective and easy process for the preparation of azithromycin monohydrate isopropanol clathrate. The process provides a one-step method of preparing azithromycin monohydrate isopropanol clathrate directly from 9-deoxo-9a-aza-9a-homoerythromycin A. The process comprises at least partial dissolution and /or suspension of 9-deoxo-9a-aza-9a-homoerythromycin A in isopropanol to form a mixture, adding methylating solution to the said mixture, refluxing or heating said mixture to form a reaction mixture, adding alkaline solution to the reaction mixture to adjust pH from about 10 to about 11 and isolating pure azithromycin monohydrate isopropanol clathrate. The process helps in reducing the total time of preparation, total utility cost for the production and also helps to avoid handling loss.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
28 June 2004
Publication Number
39/06
Publication Type
Invention Field
CHEMICAL
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2009-12-30
Renewal Date
Applicants
ALEMBIC LIMITED
ALEMBIC ROAD,
VADODARA-390003
Inventors
1. MISTRY DHIREN N.
ALEMBIC ROAD,
VADODARA-390003
2. THORAT MAHADEO M.
ALEMBIC LIMITED,
ALEMBIC ROAD,
VADODARA-390003
3. SONI KAMLESH S.
ALEMBIC LIMITED,
ALEMBIC ROAD,
VADODARA-390003
4. KANSAL VINOD KUMAR
ALEMBIC LIMITED,
ALEMBIC ROAD,
VADODARA-390003
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 687-mum-2004-form 19(30-11-2004).pdf | 2004-11-30 |
| 2 | 687-mum-2004-annexure to form 3(20-10-2005).pdf | 2005-10-20 |
| 3 | 687-MUM-2004-FORM 26(10-11-2009).pdf | 2009-11-10 |
| 4 | 687-MUM-2004-CORRESPONDENCE(10-11-2009).pdf | 2009-11-10 |
| 5 | 687-MUM-2004-CLAIMS(AMENDED)-(10-11-2009).pdf | 2009-11-10 |
| 6 | 687-mum-2004-claims(amanded)-(10-11-2009).pdf | 2009-11-10 |
| 7 | 687-mum-2004-cancelled pages(10-11-2009).pdf | 2009-11-10 |
| 8 | 687-MUM-2004-CORRESPONDENCE(20-11-2009).pdf | 2009-11-20 |
| 9 | 687-mum-2004-form 2(title page)-(granted)-(30-12-2009).pdf | 2009-12-30 |
| 10 | 687-mum-2004-form 2(granted)-(30-12-2009).pdf | 2009-12-30 |
| 11 | 687-mum-2004-drawing(granted)-(30-12-2009).pdf | 2009-12-30 |
| 12 | 687-mum-2004-description(granted)-(30-12-2009).pdf | 2009-12-30 |
| 13 | 687-mum-2004-claims(granted)-(30-12-2009).pdf | 2009-12-30 |
| 14 | 687-mum-2004-abstract(granted)-(30-12-2009).pdf | 2009-12-30 |
| 15 | 687-MUM-2004-U.S.PATENT(3-12-2008).pdf | 2018-08-09 |
| 16 | 687-mum-2004-reply to examination report(8-10-2009).pdf | 2018-08-09 |
| 17 | 687-mum-2004-power of attorney(10-9-2004).pdf | 2018-08-09 |
| 18 | 687-MUM-2004-PCT-ISA-210(3-12-2008).pdf | 2018-08-09 |
| 19 | 687-MUM-2004-PCT-IB-373(3-12-2008).pdf | 2018-08-09 |
| 20 | 687-mum-2004-general power of attorney(5-10-2005).pdf | 2018-08-09 |
| 21 | 687-mum-2004-form 3(28-6-2004).pdf | 2018-08-09 |
| 22 | 687-mum-2004-form 2(title page)-(complete)-(28-6-2004).pdf | 2018-08-09 |
| 23 | 687-MUM-2004-FORM 2(TITLE PAGE)-(27-5-2009).pdf | 2018-08-09 |
| 24 | 687-mum-2004-form 2(complete)-(28-6-2004).pdf | 2018-08-09 |
| 25 | 687-mum-2004-form 2(27-5-2009).pdf | 2018-08-09 |
| 26 | 687-mum-2004-form 1(28-6-2004).pdf | 2018-08-09 |
| 27 | 687-MUM-2004-FORM 1(27-5-2009).pdf | 2018-08-09 |
| 28 | 687-mum-2004-drawing(complete)-(28-6-2004).pdf | 2018-08-09 |
| 29 | 687-MUM-2004-DRAWING(28-6-2004).pdf | 2018-08-09 |
| 30 | 687-mum-2004-description(complete)-(28-6-2004).pdf | 2018-08-09 |
| 31 | 687-MUM-2004-DESCRIPTION(COMPLETE)-(27-5-2009).pdf | 2018-08-09 |
| 32 | 687-MUM-2004-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(14-6-2011).pdf | 2018-08-09 |
| 33 | 687-mum-2004-correspondence(ipo)-(29-1-2010).pdf | 2018-08-09 |
| 34 | 687-mum-2004-correspondence(8-10-2009).pdf | 2018-08-09 |
| 35 | 687-MUM-2004-CORRESPONDENCE(3-12-2008).pdf | 2018-08-09 |
| 36 | 687-MUM-2004-CORRESPONDENCE(29-9-2008).pdf | 2018-08-09 |
| 37 | 687-MUM-2004-CORRESPONDENCE(27-5-2009).pdf | 2018-08-09 |
| 38 | 687-mum-2004-claims(complete)-(28-6-2004).pdf | 2018-08-09 |
| 39 | 687-MUM-2004-CLAIMS(27-5-2009).pdf | 2018-08-09 |
| 40 | 687-mum-2004-annexure to form 3(9-8-2005).pdf | 2018-08-09 |
| 41 | 687-MUM-2004-ANNEXURE TO FORM 3(3-12-2008).pdf | 2018-08-09 |
| 42 | 687-mum-2004-abstract(complete)-(28-6-2004).pdf | 2018-08-09 |
| 43 | 687-MUM-2004-ABSTRACT(28-6-2004).pdf | 2018-08-09 |