Method for the transesterification of thiocarbamic acid esters
CA 1076131 A · Owner: Anic S.P.A. · Inventors: Anfossi, Bartolomeo; Koch, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for the transesterification of thiocarbamic acid esters the single-step, method consisting in reacting the esters in question with compounds of the formula R'(X'H)n wherein X' is O, S, or NH; R' is C2 to C10 alkyl or phenyl radical and n is 1 to 5. The reaction takes place in the presence of a catalyst, the most suitable being a tertiary amine and the temperature range is from 50°C to the solvent boiling point, an organic solvent being used as the reaction medium. Diazobicyclooctane is a preferred catalyst.
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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 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
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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.