Uwai K, Uchiyama H, Sakurada S, Kabuto C, Takeshita M. Syntheses and receptor-binding studies of derivatives of the opioid antagonist naltrexone.
Bioorg Med Chem 2004;
12:417-21. [PMID:
14723960 DOI:
10.1016/j.bmc.2003.10.039]
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Abstract
Naltrexone (1), which is a member of the group of competitive opioid antagonists, shows a strong affinity for mu-receptors and its derivatives have been notable as novel receptor antagonists. In this paper, the preparation of several naltrexone derivatives is described; these were used to investigate the role of the oxygenated functional groups in facilitating binding to a series of the opioid receptors. The derivatives showed affinity for opioid mu-receptors which was similar to that of naltrexone, but these compounds, which had masked hydroxyl functional groups, displayed a moderate activity. These results suggest that every oxygenated functional group in naltrexone (1) plays an important role in binding to the opioid receptor.
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