Invention Grant
- Patent Title: Process for obtaining pure oseltamivir
- Patent Title (中): 获得纯奥司他韦的方法
-
Application No.: US11719773Application Date: 2006-01-02
-
Publication No.: US07732632B2Publication Date: 2010-06-08
- Inventor: Bandi Parthasaradhi Reddy , Kura Rathnakar Reddy , Rapolu Raji Reddy , Dasari Muralidhara Reddy , Kesireddy Subash Chander Reddy
- Applicant: Bandi Parthasaradhi Reddy , Kura Rathnakar Reddy , Rapolu Raji Reddy , Dasari Muralidhara Reddy , Kesireddy Subash Chander Reddy
- Applicant Address: IN
- Assignee: Hetero Drugs Limited
- Current Assignee: Hetero Drugs Limited
- Current Assignee Address: IN
- Agency: Caesar, Rivise, Bernstein, Cohen & Pokotilow, Ltd.
- International Application: PCT/IN2006/000001 WO 20060102
- International Announcement: WO2007/077570 WO 20070712
- Main IPC: C07C229/48
- IPC: C07C229/48
Abstract:
The present invention provides a process for obtaining highly pure crystalline form of oseltamivir free base, thus, for example, suspending or dissolving impure or non-crystalline oseltamivir free base in a hydrocarbon solvent and then isolating crystals to obtain oseltamivir free base in well defined crystalline form. The present invention also provides a process for preparation of oseltamivir phosphate in high purity.
Public/Granted literature
- US20090149670A1 PROCESS FOR OBTAINING PURE OSELTAMIVIR Public/Granted day:2009-06-11
Information query
