CA1050531A — Process for preparing cephalosporin derivatives
Assigned to Sankyo Co Ltd · Expires 1979-03-13 · 47y expired
What this patent protects
ABSTRACT 7.alpha.-Methoxycephalosporin derivatives having a 7.beta. substituent of formula R1 - S - A - CO.NH -(in which: R1 represents a hydrogen atom, an acyclic hydro-carbon group, a monocyclic alicyclic hydrocarbon group having a 5- or 6- membered ring, a monocyclic or bi…
USPTO Abstract
ABSTRACT 7.alpha.-Methoxycephalosporin derivatives having a 7.beta. substituent of formula R1 - S - A - CO.NH -(in which: R1 represents a hydrogen atom, an acyclic hydro-carbon group, a monocyclic alicyclic hydrocarbon group having a 5- or 6- membered ring, a monocyclic or bicyclic aromatic group, an alkanoyl group, a benzoyl group, or a monocyclic or bicyclic heterocyclic group having at least one ring nitrogen, oxygen or sulphur atom, any of which groups may be substituted or unsubstituted; and A is a straight or branched-chain alkylene group) are prepared by reacting a 7.alpha.-methoxycephalosporin derivative having a 7.beta. substituent of formula X - A - CO.NH -(in which: A is as defined above; and X is a halogen atom) with a thiol compound of formula R1 - SH (I) or with a metal salt thereof.
Drugs covered by this patent
- Aloprim (ALLOPURINOL) · Casper Pharma Llc
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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