7-(N-substituted-2-phenylglycinamido)-3-sub stituted-3-cephem-4-carboxylic acid compounds and preparation thereof
US4172198A · kind A · utility
3Cited by
7References
23Claims
0Family size
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Key dates
| Filing date | Aug 15, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Aug 15, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D309/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New cephalosporin compounds of the formula: ##STR1## wherein R.sub.1 is hydrogen or hydroxy, R.sub.2 is a substituted alkanoyl group, R.sub.3 is hydrogen, carbamoyloxy, alkanoyloxy or a heterocyclic-thio group which may have suitable substituents, and R.sub.4 is carboxy or protected carboxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.