A series of 1-aminotetralin scaffolds was synthesized via metal-catalyzed ring-opening reactions of heterobicyclic alkenes. Small libraries of amides and amines were made using the amino group of each scaffold as a handle. Screening of these libraries against human opioid receptors led to the identification of (S)-(S)-5.2a as a high-affinity selective mu ligand (IC50 mu = 5 nM, kappa = 707 nM, delta = 3,795 nM) displaying mu-agonist/antagonist properties due to its partial agonism (EC50 = 2.6 mu M; E-max = 18%). Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
An Expedient Enantioselective Route to Diaminotetralins: Application in the Preparation of Analgesic Compounds
作者:Mark Lautens、Keith Fagnou、Valentin Zunic
DOI:10.1021/ol026579i
日期:2002.10.1
[GRAPHICS]Advances to the rhodium-catalyzed asymmetric ring-opening protocol have allowed this methodology to be extended to azabicyclic alkenes, the first time that rhodium has been used in allylic functionalizations with nitrogen leaving groups. The product diaminotetralins are important medicinal compounds. The synthetic utility of this methodology has been demonstrated in the total synthesis of an analgesic compound where the tetralin core, the regiochemistry, and the relative and absolute stereochemistry are all established in the ring-opening step.