Oripavine derivatives and their uses as pharmaceuticals

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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Details

C546S039000

Reexamination Certificate

active

07119100

ABSTRACT:
The present invention relates to oripavine derivatives of formula (I),wherein R1is hydrogen or methyl, R2is methyl, cyclopropyl methyl, cyclobutyl methyl or allyl, R3is thiophenyl ethyl or cycloalkyl methyl where the cycloalkyl has 3 to 6 carbon atoms, or non-toxic pharmaceutically acceptable salts thereof. These compounds can be used for the preparation of analgesics or abstinence agents of opium habit-forming drugs.

REFERENCES:
patent: 3433791 (1969-03-01), Bentley
patent: 3442900 (1969-05-01), Bentley
patent: 3474101 (1969-10-01), Bentley
patent: 5849915 (1998-12-01), Kim et al.
Huang, Comparison of pharmacological Activities of Buprenorphine and Norbuprenorphine: Norbuprenorphine is a Potent Opiod Agonist, J. Pharmacology and Experimental Therapeutics, 297(2), (2001), 688-695.

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