Crystalline form of eszopiclone, composition, preparation and uses thereof
US8431577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2009 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Jun 1, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention discloses a crystalline form of S-zopiclone (Formula I) having a powder X-Ray diffraction spectrum excited by Cu-Ka radiation with characteristic peaks expressed in terms of 2θ at about 11.08°, about 12.38°, about 15.86°, about 17.88°, about 19. 98° and about 20.58°; a DSC thermogram with a peak at about 207.7° C. and an infrared absorption spectrum (IR) with characteristic peaks at about 3078 cm−1, about 2942˜2838 cm−1, about 2790 cm−1, about 1716 cm−1, about 1463 cm−1, about 1372 cm−1 and about 757 cm−1. The present invention also discloses a method for preparing the crystalline form of eszopiclone, its pharmaceutical composition and its use in preparing a medicament for treating sleep disorders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.