Preparation of 7-amino-.delta.3-cephem derivatives
CA 1048950 A · Owner: Bayer Aktiengesellschaft · Inventors: Huper, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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PREPARATION OF 7-AMINO-.DELTA.3-CEPHEM DERIVATIVES WITH CARRIER BOUND PENICILLIN ACYLASE, Abstract 7-Amino-.DELTA.3-cephem derivatives of the formula: wherein, R is hydrogen, hydroxyl, amino cyano, -O-CO-NH2, wherein n is 4 to 6, -O-CO R1 -NH-CO-R1, wherein R1 is straight or, branched chain alkyl of 1 to 4 carbon atoms Het or S-Het wherein Het is a 5- or 6-membered heteroaromatic ring unsubstituted or substituted by 1 to 3 alkyl moieties of 1 to 3 carbon atoms or said ring having a positive charge; and X is hydrogen, or if R has a positive charge X is, a negative charge, which comprises contacting a compound of the formula: or a salt thereof, wherein, R and X are as above defined R2 is …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1996.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.