Crystalline acid salts of cefdinir and process for preparing cefdinir using same
US7157576B2 · kind B2 · utility
3Cited by
7References
9Claims
0Family size
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Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Mar 27, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
High purity cefdinir is prepared in a high yield by a process comprising the steps of: treating a crystalline salt of a cefdinir intermediate with a formic acid-sulfuric acid mixture or a formic acid-methanesulfonic acid mixture to obtain a crystalline salt of cefdinir and reacting the crystalline salt with a base in a solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.