Acetic Acid → N-(3-{1-[4-(4-chlorophenoxy)benzyl]-4-piperidinyl}phenyl)-2-methylpropanamide

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4-(4-chlorophenoxy)benzaldehyde (0.119 g, 0.510 mmol) and 2-methyl-N-[3-(4-piperidinyl)phenyl]propanamide (0.126 g, 0.510 mmol) were mixed in 1,2-dichloroethane (5 mL) and then treated with sodium triacetoxyborohydride (0.424 g, 2.00 mmol) and HOAc (0.03 mL, 0.5 mmol). The mixture was stirred overnight at room temperature. The reaction mixture was neutralized with saturated NaHCO3 aqueous solution and the aqueous layer was extracted with CH2Cl2 (3×10 mL). The combined organic layers were washed with brine, dried over MgSO4, concentrated in vacuo, and purified by preparative TLC using 5% of NH3 (2.0 M in methanol) in CH2Cl2 to give the desired product (53 mg, 23%). 1H NMR (400 MHz, CDCl3) δ 7.50 (s, 1H), 7.34–7.19 (m, 7H), 6.98–6.87 (m, 5H), 3.50 (s, 2H), 2.98 (d, 2H, J=11.8 Hz), 2.58–2.44 (m, 2H), 2.10–1.98 (m, 2H), 1.83–1.76 (m, 4H), 1.24 (d, 6H, J=6.8 Hz); ESMS m/e: 463.2 (M+H)+.

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