Formamido cephalosporin compounds
US4013645A · kind A · utility
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2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1972 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | Mar 28, 1992 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R33/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Protection of the amino group of a 7.beta.-aminoceph-4-carboxylic acid or derivative thereof while at least one reaction is being carried out to introduce a desired group at at least one of the positions 1, 2, 3 and 4 by first converting the amino group to a formamido group and then regenerating the amino group after the desired group has been introduced. Novel intermediates may be produced which are compounds of the formula ##STR1## wherein R is C.sub.1 -C.sub.4 alkyl and Z is --O--, --S--, ##STR2## or salts or esters thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.