Process for preparing basic thioethers and the salts thereof
CA 1279328 C · Owner: Kosary, Judit · Inventors: Matyus, Peter; Toldy, Lajos; Vitalis, Beata
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for preparing the hydrochloride of 1-{2-5-dimethylaminomethyl-2-(furylmethylthio)ethyl}-amino-1-methylamino-2-nitroethylene of formula (I) and if desired, for transforming this compound to the base of formula (I), which comprises a) reacting the monohydrochloride of 2-(2aminoethyl)-ethiomethyl-5-dimethylaminomethylfuran of formula (II) with 1-methylthio-1-methylamino-2-nitroethylene of formula (III) optionally in the presence of water and/or of an organic solvent, or b) reacting the hydrochloride of 5-dimethylaminomethy1-2-furfuryl alcohol of formula (IV) with cysteamine hydrochloride at a temperature between 20 and 120°C without adding a solvent. In the …
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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
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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.