2-Azabicyclo[2.2.2]octane analogues of the prodine analgetics

Abstract
The synthesis and analgetic activity of analogues of prodine-type analgetics in which the conformation of the piperidine ring is restricted in the boat form using the 2-azabicyclo[2.2.2]octane nucleus are reported. One of these analogues, 2-methyl-6-trans-phenyl-6-cis-propionoxy-2-azabicyclo[2.2.2]octane, showed significant analgetic activity [in mice] (ED50 = 3.1 mg/kg).