4"-deoxy-4"-(s)-amido avermectin derivatives
CA 2484667 A1 · Owner: Tobler, Hans · Inventors: Murphy Kessabi, Fiona; Tobler, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I); that has the S-configuration at the 4"-position and wherein the bond between carbon atoms 22 and 23 is a single or a double bond; R1 is C1-C12alkyl, C3-C8cycloalkyl; or C2-C12alkenyl; R2 is H or, for , example, unsubstituted or mono- to penta-substituted C1-C12alkyl C2-, C12alkenyl, C2-C12alkynyl or C1-C6alkoxy-C1-C6alkyl; R3 is H or for example, C1-C12alkyl; X is a bond, O NR4 or S; and Z is C=O, C=S or S02; and where , applicable, E/Z isomers, mixtures of E/Z isomers and/or tautomers in each , case in free form or in salt form; a process for the preparation of and the use of those compounds and their isomers and tautomers; starting materials for the …
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 May 6, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2025.
- 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.