Process for the preparation of esters
CA 1076133 A · Owner: Sumitomo Chemical Company · Inventors: Saigo, Kazuhiko; Shimada, Eiichiro; Usui, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for producing an ester from a carboxylic acid and an alcohol which comprises reacting said carboxylic acid with said alcohol by the use of a 1-substituted-2-halopyridinium salt or a 1-substituted-2haloquinolinium salt as a condensing agent in the presence of a hydrogen halide captor According to this process various esters, even if they have some steric hindrances may be obtained in good yields.
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
- Granted April 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 1997.
- 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.