Potassium Carbonate → 2-(1-(bis(4-fluorophenyl)methyl)piperidin-4-ylidene)-N-(cyclopropylmethyl)acetamide

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A mixture of N-(cyclopropylmethyl)-2-(piperidin-4-ylidene)acetamide hydrochloride (80.0 mg, 0.347 mmol) prepared in EXAMPLE 22e, 4,4′-difluorobenzhydryl chloride (0.105 ml, 0.555 mmol), K2CO3 (105 mg, 0.763 mmol) and KI (5.8 mg, 0.035 mmol) in acetonitrile (5 ml) was stirred under reflux for 12 hours. The reaction was quenched with H2O (20 ml), extracted with chloroform (30 ml×2), dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography (ethyl acetate/hexane:30/70 to 50/50) to give 2-(1-(bis(4-fluorophenyl)methyl)piperidin-4-ylidene)-N-(cyclopropylmethyl)acetamide (107 mg, 78%) as a white solid: LCMS: 397 {M+1}+. 1H NMR (DMSO-d6)□ δ: 0.11 (m, 2H), 0.38 (m, 2H), 0.87 (m, 1H), 2.22 (m, 2H), 2.32 (m, 2H), 2.36 (m, 2H), 2.93 (m, 4H), 4.47 (s, 1H), 5.61 (s, 1H), 7.13 (m, 4H), 7.43 (m, 4H), 7.87 (t, 1H).

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