Claims
- 1. Halo-substituted cephalosporins of the formula IC and non-toxic, pharmaceutically acceptable salts and esters thereof ##STR36## wherein X is halogen and R.sub.4 and R.sub.5 are individually alkyl of 1 to 8 carbon atoms or taken together with the carbon atom to which they are attached form a cycloalkylidiene of up to 8 carbon atoms.
- 2. A compound of claim 1 wherein R.sub.4 is methyl and R.sub.5 is methyl or propyl or R.sub.5 and R.sub.6 together with the carbon atom to which they are attached are selected from the group consisting of cyclopentylidene, cyclohexylidene and cycloheptylidene and X is bromine or chlorine.
Priority Claims (1)
Number |
Date |
Country |
Kind |
87201316.4 |
Jul 1987 |
EPX |
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PRIOR APPLICATION
This application is a division of U.S. patent application Ser. No. 216,877 filed Jul. 8, 1988, now U.S. Pat. No. 4,921,954.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4032521 |
Christensen et al. |
Jun 1977 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
2927462 |
Jan 1981 |
DEX |
Divisions (1)
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Number |
Date |
Country |
Parent |
216877 |
Jul 1988 |
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