(1S,2S)-2-(4-{5-[(5-chloropyridin-2-yl)thio]-1H-imidazol-4-yl}phenyl)cyclopropanecarboxylic acid (Step 3 product, 73 mg, 0.196 mmol), HOBT (60 mg, 0.393 mmol), and EDC (113 mg, 0.589 mmol) were dissolved in 3 mL of DMF, to which were added Hunig's base (0.206 mL, 1.178 mmol) and dimethyl amine (2 M THF solution, 0.294 mL, 0.589 mmol). The reaction was heated at 80° C. for 30-60 min. Upon cooling to rt, the reaction was diluted with EtOAc (80 mL), and the reaction mixture was washed with water (2-3 times) and brine, dried, and concentrated to dryness. The residue was purified by silica column (80-100% EtOAc in hexanes) to give 62 mg (79%) of the title compound. 1H NMR (500 MHz, (CD3OD): 8.38 (s, 1H), 7.97 (s, 1H), 7.65 (d, 2H), 7.59 (d, 1H), 7.18 (d, 2H), 6.82 (d, 1H), 3.16 (s, 3H), 2.97 (s, 3H), 2.38 (m, 1H), 2.19 (m, 1H), 1.54 (m, 1H), 1.27 (m, 1H). LCMS: m/z 399 (M+H)+. Human FAAH lysate assay: IC50=649.6 nM.
