Carbon analogs
CA 1098899 A · Owner: Massachusetts Institute Of Technology · Inventors: Lo, Young S.; Sheehan, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with this invention it has been found, that carbon analogs of 6.beta.-aminopenicillanic acid and biologically active derivatives thereof. can be formed from esters of 6-oxopenicillanic acid. For example 6.beta.-phenoxyacetylmethylpenicillanic acid - a carbon analog of penicillin V may be, formed from an ester of 6 -oxopenicillanate. The ester of 6oxopenicillanic acid is formed by a diiospropyl carbodiimide/ dimethyl sulfoxide oxidation of the corresponding ester of 6.alpha.hydroxypenicillanic acid. The carbon analogs are formed by a Wittig reaction of the ester of 6 oxopenicillanic acid with a suitable acylmethy1enetriphenylphosphorane followed by saturation of the newly …
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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 April 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 1998.
- 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.