Pyrrolo(2,3-d)carbazole derivatives and preparation thereof
CA 1185605 A · Owner: S.A. Omnichem · Inventors: Kuehne, Martin E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel alkyl pyrrolo- (2,3-d)carbazole-6-carboxylates of the formula and to pharmaceutically acceptable salts thereof useful for the treatment of cerebralvascular, cardio-circulatory and epipletic afflictions; their preparation of the same by a synthesis sequence starting from a tryptamine and a 3-halopyruvate and involving a rearrangment of an addition compound with an aldehyde; said rearrangement being effected by Nb-alkylation of the aforementioned addition compound; and to pharmaceutical compositions containing the same.
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
- Granted April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- 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.