Title:
AN IMPROVED PROCESS FOR THE PREPARATION OF INDIGO CARMINE
Document Type and Number:
WIPO Patent Application WO/2017/093866
Kind Code:
A3
Abstract:
The present invention relates to an improved process for preparation of Indigo carmine of Formula (I), in high purity more than 99.5%.
Inventors:
VYAS JANMEJAY RAJNIKANT (IN)
DHOTRE HIMANI (IN)
SARMA NARASIMHA (IN)
PATEL DILIP N (IN)
SANGANI PIYUSH (IN)
SHAH ARPAN KIRITBHAI (IN)
PATEL BABULAL R (IN)
WADIA DEVANG (IN)
DHOTRE HIMANI (IN)
SARMA NARASIMHA (IN)
PATEL DILIP N (IN)
SANGANI PIYUSH (IN)
SHAH ARPAN KIRITBHAI (IN)
PATEL BABULAL R (IN)
WADIA DEVANG (IN)
Application Number:
PCT/IB2016/057126
Publication Date:
July 20, 2017
Filing Date:
November 25, 2016
Export Citation:
Assignee:
DISHMAN PHARMACEUTICALS AND CHEMICALS LTD (IN)
International Classes:
C08G61/12; C09B67/00; C09B61/00; C09B69/00
Foreign References:
| US4370424A | 1983-01-25 | |||
| US20140152748A1 | 2014-06-05 |
Other References:
PRANAB ET AL.: "Oxidative degradation of indole using mixed ligand Co(II) complex and hydrogen peroxide : Selective formation of indole dimers", CHEMISTRY & BIOLOGY INTERFACE, vol. 1, no. 3, 2011, pages 355 - 359, XP055398691, Retrieved from the Internet [retrieved on 20170417]
DATABASE PUBCHEM 15 September 2004 (2004-09-15), XP055398693, Database accession no. 798260
DATABASE PUBCHEM 15 September 2004 (2004-09-15), XP055398693, Database accession no. 798260
Attorney, Agent or Firm:
MAJUMDAR, Subhatosh et al. (IN)
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