Propagylglycine derivatives, preparation and utilisation thereof as synthesis intermediates
CA 2250747 A1 · Owner: Goberville, Pascale · Inventors: Chekroun, Isaac; Rossey, Guy; Goberville, Pascale
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) wherein R2 is -CH2CCH or -CH2CC-Het where Het is a 2aminopyridyl, 2-aminopyrimidyl, 6-aminopyridazinyl imidazol-4-yl group, R3 , and R4 each represent hydrogen (C1-C4)alkyl, (C1-C4)alkoxycarbonyl, ArCH2CO2- or ArSO2- where Ar is an aryl group, or a group (a) where R7 is hydrogen or - COR, R being straight or branched (C1-C7) alkyl -(CH2)nOCH3 or -, CH2O(C2H4O)nCH3 (n is 1 2 or 3) and A is chosen among the phenyl pyrimidyl, pyridinyl, thienyl, thiazolyl and furyl groups R6 represents either a , straight or branched (C1-C4) alkoxy group or a benzyloxy group or a group (b) , where R12 is a hydrogen atom or a carboxylic or (C1-C4)alkoxycarbonyl group and R13 is a …
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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
- Filed April 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 2019.
- 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
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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.