Pyrrolizidine derivative
CA 1255315 A · Owner: Suntory Limited · Inventors: Satoh, Fumio; Shima, Keiyu; Ishihara, Takafumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel pyrrolizidine derivative of the formula which has potent antiarrhythmic activity and low toxicity is produced. The derivative can be synthesized. by acylating 2,6-xilidine to protect the amino group nitrating the, protected xilidine to introduce a nitro group at 3-position, reducing the nitro group to an amino group followed, by diazotizing and hydrolyzing and then the resulted, 3-hydroxy-2,6-dimethylaniline being condensed with 8-halocarbonylmethylpyrrolizidine; or by nitrating N-(2' ,6- '-dimethyl)phenyl-8-pyrrolizidineacetamide to introduce a nitro group at 3'-positions, reducing the nitro group to amino group, diazotizing the amino group and hydrolyzing the diazonium compound.
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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.