Intermediates for the preparation of 4-phenyl-1,3- benzodiazepins and methods for preparing the intermediates
CA 1208233 A · Owner: Hoechst Marion Roussel, Inc. · Inventors: Lee, Thomas B.K.; Lee, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compounds of the formula III III, wherein R2 is -C(CH3)3 or -O-C(CH3)3. Also provided is a process for the preparation of these compounds. Compounds of the formula III are useful in the preparation of 4-phenyl-1,3-benzodiazepins which, exhibit activity as antidepressants analgetics and, anti-convulsants.
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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 July 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 22, 2003.
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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.