Improved process for preparing nitrogen-substituted aminotetralins
CA 2392563 C · Owner: Discovery Therapeutics, Inc. · Inventors: Rippel, Keith; Minaskanian, Gevork
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for preparing optically active and racemic nitrogen-substituted , 2-aminote-tralins of Formula (I) wherein R1 is OA; R2 is selected from the group consisting of H and OA; A is H or is selected from the group consisting of a straight or a branched alkyl chain having from 1 to 3 carbon atoms, (a), (b), (c) and (d), wherein R5 is selected from the group consisting of C1-C20 alkyl, C6-C10 aryl and C7-C20 arylalkyl; R3 is selected from the group consisting of alkoxy cycloalkoxy, optionally substituted phenyl 3-pyridyl, 4-pyridyl, (e), (f) and (g) where X , is S, O or NH; R4 is an unbranched alkyl chain having from 1 to 3 carbon atoms; and n is an …
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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
- Filed November 16, 2000 and granted February 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2022.
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