Process for the preparation of cephalosporin compounds and synthetic intermediates
US6825344B2 · kind B2 · utility
2Cited by
2References
2Claims
0Family size
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Key dates
| Filing date | Jul 30, 2001 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Jul 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a process for the preparation of a compound according to Formula (II): which includes the step of cyclising a compound of Formula (III): wherein R1, R2, R3, R4, X and m have meanings which are given in the description.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.