Process for the preparation of hexahydropyrazinoindoles and hexahydropyrazinoindoles so formed
CA 1088536 A · Owner: Merck Patent Gesellschaft Mit Beschraenkter Haftung · Inventors: Jonas, Rochus; Klug, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel hexahydropyrazinoindole of the formula is obtained by reacting 1-(2-hydroxyethyl)-3-hydroxy-1,2,3,4-tetrahydroquinoline with an inorganic acid halide selected from an inorganic acid chloride and an inorganic acid bromide and then converting the, 1-(2-haloethyl)-2-halomethylindoline so formed to the desired compound by treatment with benzylamine. This compound is an intermediate for the preparation of compounds having utility for the treatment of hypertension.
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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- 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.