Title:
THE PROCESS FOR RESOLVING DL-EPHEDRINE OR THE DERIVATIVES THEREOF AND THE RESOLVING AGENTS
Document Type and Number:
WIPO Patent Application WO/2006/050633
Kind Code:
A1
Abstract:
The invention relates to the process for resolving DL-ephedrine or the derivatives thereof and to the corresponding resolving agents. The L-(-)-dibenzoyl-tartaric acid or its derivatives of formula (I) are the resolving agents for DL-ephedrine of formula (II), in which the groups in formulas (I) and (II) are defined as claims.
Inventors:
LI SONG (CN)
NIE AIHUA (CN)
NIE AIHUA (CN)
Application Number:
PCT/CN2004/001284
Publication Date:
May 18, 2006
Filing Date:
November 11, 2004
Export Citation:
Assignee:
INST PHARM & TOXICOLOGY AMMS (CN)
LI SONG (CN)
NIE AIHUA (CN)
LI SONG (CN)
NIE AIHUA (CN)
International Classes:
C07B57/00; C07C213/10; C07C215/30; C07C215/60; C07C217/70; C07M7/00; (IPC1-7): C07C215/30; C07B57/00; C07C213/10; C07C215/60; C07C217/70; C07M7:00
Foreign References:
| JPH07138206A | 1995-05-30 | |||
| GB405520A | 1934-02-08 |
Other References:
LIHONG GAO ET AL: "Resolution of DL-pseudoephedrine by supercritical fluid extraction.", ACTA PHARMACEUTICA SINICA., vol. 37, no. 12, 2002, pages 959 - 962
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (Vantone New World Plaza 2 Fuchengmenwai Street, Beijing 7, CN)
Download PDF: