Water → Phenylmethyl 4-{1-[2-methyl-5-(methyloxy)-4-nitrophenyl]-4-piperidinyl}-1-piperazinecarboxylate

Participants

Reaction Steps

5-Fluoro-4-methyl-2-nitrophenyl methyl ether (2.76 g, 14.9 mmol) was dissolved in DMSO (50 mL), and K2CO3 (10.3 g, 74.5 mmol) and phenylmethyl 4-(4-piperidinyl)-1-piperazinecarboxylate bis(trifluoroacetate) salt (Example 112, step B) (8.0 g, 15 mmol) were added. Reaction was stirred overnight. Poured into H2O and extracted (2×) with EtOAc. Combined organic layers were back-extracted (5×) with H2O and then dried over MgSO4, filtered, concentrated on to silica gel and flash chromatographed to give the title compound of step C (4.6 g, 66%). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.72 (s, 1H), 7.03-7.46 (m, 5H), 6.64 (s, 1H), 5.03 (s, 2H), 3.85 (s, 3H), 3.06-3.59 (m, 6H), 2.67 (t, J=11.5 Hz, 2H), 2.26-2.57 (m, 5H), 2.15 (s, 3H), 1.81 (d, J=11.5 Hz, 2H), 1.36-1.68 (m, 2H).

Provenance & Evidence