6-aminopenicillanic acid esters
CA 1238311 A · Owner: Kanebo Ltd. · Inventors: Tsukamoto, Goro; Sakamoto, Fumio; Ikeda, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are intermediates of the general formula (V), wherein R1 represents a hydrogen atom a methyl group or an aryl group, and R2 represents a hydrogen atom or may be taken together with R1 to form a divalent carbon chain residue, or its acid addition salt. The intermediates may be used for preparing novel Ampicillin esters by reacting with phenylglycine of the formula Ph-CH(NH2)-COOH. The intermediates are prepared by reacting a compound of the formula (III), wherein R1 and R2 are as defined above and X is a halogen atom, with, a (6-protected)-aminopenicillanic acid or its salt.
Read the whole patent
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 June 21, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.