Process for the manufacture of 1,2-disubstituted 1,2,3,4,5,6,7,8-octahydroisoquinolines
CA 1310012 C · Owner: Peter, Philippe · Inventors: Peter, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the manufacture of the isoquinolines of the formula, (I), wherein R is methyl or benzyl and R' is phenyl p-hydroxyphenyl or p-methoxyphenyl, by reacting a solution of an enamine of the formula II, wherein R and R' have the above significance in a hydrocarbon with an anhydrous solution of p-toluenesulphonic acid in toluene or xylene at an elevated temperature.
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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.