The synthesis and evaluation of the major metabolites of mazapertine

Several of the key metabolites of mazapertine, a novel antipyschotic agent, were prepared in order to firmly establish their chemical structure and to obtain samples for biological testing. Hydroxymazapertine 3 was synthesized via a multi-step procedure starting from 5-fluoro-2-nitrophenol (8). Alcohol 4 was originally proposed for one of the major metabolites, but the confirmed structure after synthesis was isomer 20.