Preparation of dihydrocodeine from codeine

Details Preparation of dihydrocodeine from codeine Preparation of dihydrocodeine from codeine

2005-05-03

2005-05-03

Aulakh, Charanjit S. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S043000

Reexamination Certificate

active

06887999

ABSTRACT:
A process for the preparation of dihydrocodeine by hydrogenating codeine or a salt thereof in aqueous solution in the presence of a catalytic metal and deactivating agent that decreases impurities formation.

REFERENCES:
patent: 3830819 (1974-08-01), Grew
patent: 3953883 (1976-04-01), Grew
Black, Howard T. et al., Synthetic Communications, “A Rapid, Nearly Quantitative conversion of Codeine to Hydrocodone,” V. 30, No. 17, pp. 3195-3201, (2000), by Marcel Dekker, Inc.
Rapoport, Henry et al., The Journal of Organic Chemistry, “The Preparation of Some Dihydro Ketones in the Morphine Series by Oppenauer Oxidation,” V. 15, No. 4, pp. 1103-1107, (1950), Published by The Williams & Wilkins Company, Baltimore, MD, USA.
Van Duin, Constant Frederik et al., Journal of the Chemical Society, “The Morphine Group, Part III. The Constitution of Neopine,” pp. 903-908, (1926), London.
Wieland, Heinrich et al., Justus Liebig's Annalen der Chermie, “Einige Bemerkungen zur Konstituition des Morphins,” V. 433, pp. 267-271, (1923), Verlag Chemie, GmbH., Leipzig u. Berlin, Printed in Germany.

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