N-3(9)-Arylpropenyl-N-9(3)-propionyl-3,9-diazabicyclo[3.3.1]nonanes as μ-Opioid receptor agonists. Effects on μ-Affinity of arylalkenyl chain modifications
摘要:
Two series of N-3-arylpropenyl-N-9-propionyl-3,9-diazabicyclo[3.3.1]nonanes (1b-j) and of the reverted N-3-propionyl-N-9-arylpropenyl isomers (2b-j) as analogues of the previously reported analgesic N-3(9)-cinnamyl-N-9(3)-propionyl-3,9-diazabicyclo[3.3.1]nonanes (DBN) (1a, 2a) were synthesised and their affinity and selectivity towards opioid mu-, delta- and K-receptors were evaluated. Several compounds (1e,i.j 2d,e,f,g,j) exhibited a p-affinity in the low nanomolar range with moderate or negligible affinity towards delta- and kappa-receptors. The representative term N-9-(3,3-diphonylprop-2-enyl)-N-3-propionyl-DBN (2d) displayed in vivo (mouse) a potent analgesic effect (ED50 3.88 mg/kg ip) which favourably compared with that of morphine (ED50 5 mg/kg ip). In addition, 2d produced in mice tolerance after a period twice as long with morphine. (C) 2002 Elsevier Science Ltd. All rights reserved.
Intramolecular Cyclization of 3,3-Diarylpropenylamides of Electron-Deficient Alkenes: Stereoselective Synthesis of Functionalized Hexahydrobenzo[<i>f</i>
]isoindoles
Reaction of electron‐deficient alkenes with 3,3‐diaryl‐2‐propen‐1‐amines under the amide formation conditions gave the tricyclic compounds in sequential processes involving intramolecular Diels–Alder reaction. The reaction gave cis‐ and trans‐fused tricyclic compounds selectively, depending on the substituents on the benzene ring, reaction temperature and solvent.