Process for preparing 3-substituted-methyl-3-cephem derivatives
US4699980A · kind A · utility
16Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Feb 8, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsilyl derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4-carboxylic acid iodide and trimethylsilyl 7-trimethyl-silylamino-3-(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-ceph em-4-carboxylate iodide are valuable intermediates in the preparation of new and novel antibacterial agents. A new process for the preparation of these acids and the derivatives has been devised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.