Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-10-23
2007-10-23
Aulakh, Charanjit S. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S045000, C546S046000
Reexamination Certificate
active
10530446
ABSTRACT:
A process for the preparation of a quaternary derivative of the morphinan alkaloid, the process comprising contacting a tertiary N-substituted morphinan alkaloid with an alkyl halide in an anhydrous solvent system, wherein the solvent system comprises an aprotic dipolar solvent with the aprotic dipolar solvent constituting at least 25 wt. % of the solvent system.
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Cantrell Gary L.
Halvachs Robert E.
Aulakh Charanjit S.
Mallinckrodt Inc.
Senniger Powers
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