5‐Methylnaioxone and 5‐Methylnaltrexone: Synthesis and Pharmacological Evaluation

Abstract
Starting from 5‐methyl‐oxycodone (6), 5‐methylnaloxone (4), and 5‐methylnaltrexone (5) have been prepared in several steps. Both 4 and 5 behaved as partial agonists in the AcOH writhing agonism and antagonism test in mice.