A solution of N-methyl-N-[2-(4-phenoxyphenyl)ethyl]-4-piperidinamine (about 0.7 mmol) in DMF (5 mL) and diisopropylethylamine (5 mL) was stirred as methyl 4-(bromomethyl)benzoate (163 mg, 0.71 mmol) was added. The reaction was stirred for 54 hours at ambient temperature. The reaction was diluted with ethyl acetate, washed with brine, dried, and concentrated to give methyl 4-[[4-[methyl[2-(4-phenoxyphenyl)ethyl]amino]-1-piperidinyl]methyl]benzoate; 1H NMR (CDCl3) 7.76 (d, 2H), 7.37 (d, 2H), 7.28 (td, 2H), 7.14 (d, 2H), 7.06 (dt, 1H), 6.95 (dt, 2H), 6.92 (dd, 2H), 3.84 (s, 3H), 3.55 (s, 2H), 2.87 (m, 2H), 2.71 (m, 3H), 2.51 (m, 1H), 2.01 (s, 3H), 1.98 (m, 2H), 1.76 (m, 2H), 1.62 (m, 2H) ppm.
