Method for preparing an aza-macrolide with 4"(r)nh2
CA 2359967 C · Owner: Oddon, Gilles · Inventors: Garel, Laurent; Lhermitte, Frederic; Leon, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject-matter of the invention is a process for the stereoselective preparation of a compound of general formula I, (see formula I) by stereoselective displacement by a nitrogenous nucleophilic compound of the activated alcohol functional group present at this 4" position in a corresponding derivative of formula II.
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
- Filed January 17, 2000 and granted August 30, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2022.
- 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.