Production method of imidazole derivatives
CA 2375287 A1 · Owner: Kawakami, Jun-Ichi · Inventors: Kawakami, Jun-Ichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An industrially advantageous process for the preparation of compounds of general formula (V) exhibiting a steroid C17-C20 lyase inhibitory activity which is reduced in the number of steps attains a high yield and dispenses , with the use of a heavy metal compound wherein A is an optionally substituted imidazole ring; R is an optionally substituted hydrocarbon group or a heterocyclic group; and R1, R2, R3, R4 R5, R6, and R7 are each hydrogen, optionally substituted hydrocarbyl OH, SH, NH2, acyl, halogeno, or the like.
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 June 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 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.