Title:
CRYSTALLINE TETRABENZYL VOGLIBOSE AND THEIR PREPARATION
Document Type and Number:
WIPO Patent Application WO/2008/011791
Kind Code:
A1
Abstract:
The present invention provides crystalline tetrabenzyl voglibose with the
following physical properties: there are peaks at 2θ=16.84±0.20°C,
18.99±0.20°and 24.11±0.20°of its Cu X-ray powder diffraction
spectrum, and its melting point is 88.0°C~90.8°C. The present invention
also provides a method for preparing the said crystal and a method of using the
said crystal to prepare voglibose with high purity. Since the crystalline tetrabenzyl
voglibose has higher purity and content than the oily tetrabenzyl voglibose,
it can be stored and transported more easily, can be fetched and weighed more conveniently
and when it is used to prepare voglibose, less impurity would be introduced or
produced in the reaction.
Inventors:
LIU LIGANG (CN)
LI RUIWEN (CN)
LI RUIWEN (CN)
Application Number:
PCT/CN2007/001902
Publication Date:
January 31, 2008
Filing Date:
June 18, 2007
Export Citation:
Assignee:
SHENZHEN PHARMAXYN LABS CO LTD (CN)
LIU LIGANG (CN)
LI RUIWEN (CN)
LIU LIGANG (CN)
LI RUIWEN (CN)
International Classes:
C07C215/44; C07C213/10
Domestic Patent References:
| WO2005030698A1 | 2005-04-07 | |||
| WO2005049547A1 | 2005-06-02 |
Foreign References:
| CN1931826A | 2007-03-21 |
Attorney, Agent or Firm:
LECOME INTELLECTUAL PROPERTY AGENT LTD. (Tower B INDO Mansion,No.48, Jia Zhichun Road,Haidian District, Beijing 8, CN)
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