Design, synthesis, and structure–activity relationships of 1,3,4-oxadiazol-2(3H)-ones as novel FAAH inhibitors

Novel 5-aryloxy substituted 3-phenyl-1,3,4-oxadiazol-2(3H)-ones were prepared and identified as potent inhibitors of FAAH. In vitro SAR are discussed. Structural variations of the selected lead compound were explored in order to optimise in vivo efficacy and selectivity.