Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 13, Issue 6, Pages 1207-1214Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0960-894X(03)00056-8
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A number of analogues of morphine-6-glucuronide 1 have been prepared and evaluated as potential analgesic agents by competitive mu-receptor binding assay and in vivo antinociceptive activity. The analogues show variation in the nature of the carbohydrate residue, the N-substituent, the O(3)-substituent and saturation of the 7,8-double bond compared to 1. In general, only the 6beta-glucoside or beta-glucuronide carbohydrate residues showed potent agonism; other modified carbohydrates were less active or exhibited potential antagonism. Variations in N-substituent led to either reduced agonism (N-H) or potential antagonism [N-allyl, N-(cyclopropyl)methyl]; a polar N-substituent, carboxymethyl, failed to bind. Saturation of the 7,8-double bond led to increased agonism compared to the parent compound in all three examples studied. (C) 2003 Elsevier Science Ltd. All rights reserved.
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