N-substituted octahydro-4a-(3-hydroxyphenyl)-10a-methyl-benzo[ g]isoquinolines are opioid receptor pure antagonists

Abstract

N-Methyl- and N-phenylethyl-(±)-1,2,3,4,4a,5,10,10a-octahydro-4a-(3-hydroxyphenyl)-10a-methyl-benzo[ g]isoquinolines ( 4 and 5, respectively) were found to be pure opioid antagonists. These compounds were shown to share many of the characteristics identified with the N-methyl- and N-phenylethyl trans-3,4-dimethyl-4-(3-hydroxyphenyl)piperidine ( 1 and 2, respectively) including N-substituent mediated potency and a lack of N-substituent mediated antagonism. These data suggest that compounds 4 and 5 and the N-substituted trans-3,4-dimethyl-4-(3-hydroxyphenyl)piperidines ( 1 and 2) may interact with opioid receptors similarly.