(R)-11-hydroxy- and (R)-11-hydroxy-10-methylaporphine: synthesis, pharmacology, and modeling of D2A and 5-HT1A receptor interactions

J Med Chem. 1995 Feb 17;38(4):647-58. doi: 10.1021/jm00004a011.


(R)-11-Hydroxyaporphine (2) and (R)-11-hydroxy-10-methylaporphine (3) were synthesized from natural morphine by using new, short, and efficient synthetic sequences. The dopaminergic and serotonergic effects of 2 and 3 were evaluated by use of in vitro and in vivo test systems. The results indicate that 3 is a potent, selective, and efficacious 5-HT1A receptor agonist. In contrast, 2 is a partial 5-HT1A receptor agonist of low potency which has affinity also for central D1 and D2A receptors. The differences in pharmacological profiles were rationalized by modeling of ligand-receptor interactions using homology-based receptor models of the 5-HT1A and D2A receptor binding site. The selective and pronounced serotonergic effects of 3 appear to be due to the C10-methyl group, which is accommodated by a lipophilic pocket in the 5-HT1A receptor. In contrast, the C10-methyl group of 3 is not accommodated by the binding site model of the D2A receptor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenylyl Cyclases / metabolism
  • Animals
  • Aporphines* / chemical synthesis
  • Aporphines* / pharmacology
  • Colforsin / pharmacology
  • Computer Graphics
  • Crystallography, X-Ray
  • Enzyme Activation
  • Humans
  • Male
  • Microdialysis
  • Rats
  • Rats, Sprague-Dawley
  • Receptors, Dopamine D2 / agonists*
  • Serotonin Receptor Agonists* / chemical synthesis
  • Serotonin Receptor Agonists* / pharmacology


  • Aporphines
  • Receptors, Dopamine D2
  • Serotonin Receptor Agonists
  • PM 1000
  • Colforsin
  • 11-hydroxyaporphine
  • Adenylyl Cyclases