Method for producing indan derivatives
CA 1312995 C · Owner: Takeda Chemical Industries, Ltd. · Inventors: Kato, Takeshi; Fujii, Tomoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing an indan derivative represented by the formula:, by condensing an N-(.alpha.-alkoxycarbonylaralkyl)-.alpha.-amino acid with an N-(indan-2-yl)glycine alkyl or aralkyl ester in the presence of a diphenyl phosphorochloridate, and a method for producing another indan derivative having anti-hypertensive activity by using the above intermediate indan derivative are useful for industrial production of the indan derivative having anti-hypertensive activity.
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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.