Process for the preparation of halogenated .beta.-lactam compounds
US5532353A · kind A · utility
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22Claims
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Key dates
| Filing date | May 10, 1993 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | May 10, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is described the preparation of halogenated .beta.-lactam derivatives by introduction of a chlorine atom in the 3-position of the cephem nucleus starting from a 3-sulfonyloxycephem. Such starting materials are reacted with a chlorine ions donor in a basic medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.