3-(1-Halo-2-oxoethyl)cephalosporin intermediates
US4554350A · kind A · utility
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6Claims
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Key dates
| Filing date | Aug 11, 1983 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Aug 11, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New cephalosporin derivatives of the formula: ##STR1## in which R is an amino-protecting radical, R' is a protected carboxyl radical, Hal is a halogen atom, R.sub.a, R.sub.b and R.sub.c are hydrogen atoms, or R.sub.a is a protected carboxyl radical and R.sub.b and R.sub.c, which are identical or different, are hydrogen atoms, or C.sub.1 -C.sub.4 alkyl radicals, or together form a C.sub.2 -C.sub.5 alkylene radical, and n=0 or 1, their isomeric forms and mixtures thereof, are useful for the preparation of cephalosporins which have antibacterial properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.