Drying process for preparing crystalline solid famciclovir
US7473780B2 · kind B2 · utility
0Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Jul 19, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a drying process for preparing crystalline solid famciclovir form I comprising the steps of: i) preparing a wet crystalline form of famciclovir; ii) drying the wet crystalline form of famciclovir at a temperature of below 50° C. until the crystalline form contains less than 15% (wt/wt) wetness; and iii) drying the wet crystalline form of famciclovir at a temperature of above 50° C. until the wet crystalline form of famciclovir contains less than 0.05% (wt/wt) water to obtain crystalline solid famciclovir form I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.