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J Med Chem. 2004 Dec 16;47(26):6645-8.

Effects of substitution on the pyrrole N atom in derivatives of tetrahydronaltrindole, tetrahydrooxymorphindole, and a related 4,5-epoxyphenylpyrrolomorphinan.

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Department of Pharmacy and Pharmacology, University of Bath, Bath, BA2 7AY, U.K.


The effect of substitution of the pyrrolo- and indolo-N atoms in tetrahydronaltrindole (TNTI), tetrahydrooxymorphindole (TOMI), and 17-cyclopropylmethyl-3,14-dihydroxy-4,5-epoxy-4'-phenyl-6,7:2',3'-pyrrolomorphinan (4) is reported. In opioid functional assays 4 were potent deltaopioid receptor (DOR) antagonists while the TNTI derivatives (7) were potent DOR antagonists or low-efficacy DOR partial agonists without substantial selectivity. The TOMI derivatives (8) were DOR agonists with significant selectivity. In vivo the DOR antagonist activity of 7d was confirmed, but the predominant agonist effect of 8d was shown to be mu opioid receptor mediated.

[Indexed for MEDLINE]

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