A process for the preparation of 1-amino-1-methyl-3(4)-aminomethyl cyclohexane
CA 2232503 A1 · Owner: Van Der Knaap, Theo · Inventors: Woestenborghs, Pierre; Maas, Peter; Arlt, Dieter
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 the presentation of 1-amino-1-methyl-3(4)-aminomethyl cyclohexane (AMCA) by a) catalytically hydrogenating 1-formamido-1-methyl-3(4)-cyano cyclohexane (FMC) in a first reaction stage to form 1-formamido-1methyl-3(4)-aminomethyl cyclohexane (FMA) 1-amino-1-methyl-, 3(4)-formamidomethyl cyclohexane (AMF) 1-formamido-1-methyl-, 3(4)-formamidomethyl cyclohexane (FMF) and/or AMCA and, b) reacting FMA, AMF and/or FMF in a second reaction stage with an alkaline compound to from AMCA and a formic acid derivative and, c) separating the reaction mixture obtained in step b) into components by fractional distillation and/or by crystallization and …
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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 March 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.