A simplified method for the produuction of vinyl glycine (2-aminobut-3-enioc acid) and a convenient resolution of a derivative
CA 2091233 A1 · Owner: Hallinan, Keith O. · Inventors: Hallinan, Keith O.; Crout, David H. G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A Simplified Method for the Production of Vinyl Glycine (2-Aminobut-3-enioc Acid) and a Convenient Resolution of a Derivative The invention relates to a three-step synthesis of vinyl glyoine (1) using a cheap commercially available starting material (3-butenenitrile (2)) and using cheap simple, reagents. Also disclosed is a convenient optical resolution of the Ntert.butyloxycarbonyl derivative by papain-catalysed enantioselective esterification in a two-phase system.
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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 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2015.
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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.