PROCESS FOR THE PRODUCTION OF .beta.-CARBOLINES BY DEHYDROGENATION
CA 1290337 C · Owner: Huth, Andreas · Inventors: Borner, Helmut; Haffer, Gregor; Huth, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
beta.-carbolines of formula 1 ( I ), wherein R = C1-5 alkyl, R4 = H, C1-5 alkyl or -(CH2)n-OR with n = 1 or 2 and RA = H, R, (CHR)n-OR, OCH2Ph OPh, OPh(Cl,Br), OR, OCH2Ph(Cl,Br) NRR Cl or Br, wherein n and R have the, above meanings and there are one or two RA's are prepared by, dehydrogenation at reaction temperatures below ambient temperature in an inert solvent with tert-butyl hypochlorite and a tertiary amine.
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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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
- 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.