125104-95-2Relevant academic research and scientific papers
New κ-Receptor Agonists Based upon a 2-piperidine Nucleus
Scopes, David I. C.,Hayes, Norman F.,Bays, David E.,Belton, David,Brain, John,et al.
, p. 490 - 501 (2007/10/02)
The syntheses of some 1--2-piperidines and their activities as κ-opioid receptor agonists are described.Selected structural modifications are made to the basic moiety and at the 2-, 3-, 4-, 5-, and 6-positions on the piperidine nucleus to enable structure-activity relationships to be delineated.As a result, some highly potent and selective κ-receptor agonists have been identified.In particular, this has been achieved by introduction of oxygen-containing functionality into the 4-position of the piperidine nucleus or the 3-position of the pyrrolidinylmethyl side chain.Thus, 1--2-piperidine (10) possesses high activity in the rabbit vas deferens (LVD, κ-specific tissue) (IC50 = 0.20 nM) and is a potent antinociceptive agent, as determined by the mouse acetylcholine-induced abdominal constriction test (MAC) (ED50 = 0.06 mg/kg, sc).The spirocyclic analogue 8--7-(1-pyrrolidinylmethyl)-1,4-dioxa-8-azaspirodecane (39) showed exceptionally potent activity: LVD, IC50 = 0.10 nM; MAC, ED50 = 0.001 mg/kg, sc.Both 10 and 39 displayed high selectivity for κ-opioid receptors over both μ- and δ-opioid receptor subtypes.
