Polymorphic and other crystalline forms of cis-FTC
US7544692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Aug 25, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/22
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Solid phases of (−)-cis-FTC, which are designated herein as amorphous (−)-FTC and Forms II and III (−)-cis-FTC) are provided that can be distinguished from Form I (−)-cis-FTC by X-ray powder diffraction patterns, thermal properties, and methods of manufacture. A hydrated crystalline form of (±)-cis-FTC (i.e. racemic cis-FTC), and a dehydrated form of the hydrate, are also provided, and can similarly be distinguished from other forms of FTC by X-ray powder diffraction patterns, thermal properties, and methods of manufacture. These FTC forms can be used in the manufacture of other forms of FTC, or in pharmaceutical compositions. Particularly preferred uses of these forms are in the treatment of HIV or hepatitis B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.