Sulfate esters of morphine derivatives: synthesis and characterization.

Sixteen 3-O- and 6-O-sulfate esters of morphine, codeine and some of their N-methyl quaternary derivatives were synthesized by means of sulfation with pyridine-SO(3) complex and sulfuric acid/N,N'-dicyclohexylcarbodiimide. Complete (1)H- and (13)C-NMR assignments are given for each of the synthesized compounds based on one- and two-dimensional homo- and heteronuclear measurements. Comparative analysis of chiral properties by circular dichroism and optical rotatory dispersion revealed characteristic differences in the spectra due to changes in charge, polarity and intramolecular association by strong hydrogen bonds in aqueous solution. The synthesized sulfate esters are prospective peripheral analgesics lacking central side effects and are also useful as reference substances for various analytical studies involving sulfate ester metabolites. Copyright © 2010 Elsevier B.V. All rights reserved.

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András Váradi, András Gergely, Szabolcs Béni, Péter Jankovics, Béla Noszál, Sándor Hosztafi. Sulfate esters of morphine derivatives: synthesis and characterization. European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences. 2011 Jan 18;42(1-2):65-72

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PMID: 21034820

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