Amorphous form of rifaximin and processes for its preparation
US7709634B2 · kind B2 · utility
32Cited by
6References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 20, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D498/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A stable amorphous form of rifaximin is disclosed. This form is chemically and polymorphically stable on storage and can be prepared by dissolving rifaximin in a solvent to form a solution, which is precipitated by adding an anti-solvent and isolating of the precipitated amorphous rifaximin as an end product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.