Process for the preparation of sugar epitopes
CA 2071050 A1 · Owner: Kinzy, Willy · Inventors: Kinzy, Willy
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 new process for the stereoselective preparation of Gal-.alpha.(1-3)/Gal-.beta.(1-4)/ GlcNac trisaccharides of the formula, and of .beta.(1-3)-linked oligolactosamines of the formula via partially alkylated glycals of the formula and other new intermediate products, wherein depending, on the formula, R is H, R'CH2- or allyl R1 is H, R'CH2-, allyl or R'CO-, R' is H C1 to C3-alkyl or (un)substituted phenyl S is a spacer, preferably of the formula -(CH2)n-COOR" R" is alkyl having 1 to 4 C atoms, X is N3 or -NHCOCH3 Y is .beta.-OSiR23 or .alpha.-OC(=NH)CCl3 R2 is C1 to C4-alkyl or phenyl, and, m and n are integers from 1 to 4 or 4 to 12 respectively.
Read the whole patent
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 June 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2014.
- 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.