Preparation of 1-desoxy-nojirimicin and n-substituted derivatives
CA 1113100 A · Owner: Bayer Aktiengesellschaft · Inventors: Stoltefuss, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the production of a compound of the formula, (I), in which R denotes a hydrogen atom or an alkyl aralkyl or aryl group and com-, prises deblocking a compound of the general formula (X) or (XI), , in which, R has the meaning indicated above by treatment with a strong mineral, acid and isolating the intermediate product in the form of a salt thereof and then hydrogenating said salt with a suitable hydrogen donor or, in a one-pot, process, first deblocking the starting material by treatment with a strong mineral acid and, after controlled addition of a base hydrogenating directly.
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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 November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 1998.
- 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.