Triethylamine → 1-{1-[3-(Methyloxy)-4-nitrophenyl]-4-piperidinyl}-4-(methylsulfonyl)piperazine

Participants

Reaction Steps

To a suspension of 1-{1-[3-(methyloxy)-4-nitrophenyl]-4-piperidinyl}piperazine (5.0 g, 11.6 mmol), methane sulfonyl chloride (1.4 mL, 17.5 mmol) and dichloromethane (200 mL) was added triethylamine (8.1 mL, 58.2 mmol). The reaction was stirred at room temperature and monitored by TLC. After complete consumption of the starting material the clear yellow solution was concentrated onto silica gel and purified by chromatography to afford 1-{1-[3-(methyloxy)-4-nitrophenyl]-4-piperidinyl}-4-(methylsulfonyl)piperazine as a yellow solid (3.54 g, 76%). 1H NMR (400 MHz, DMSO-d6) δ 7.85 (d, J=9.5 Hz, 1H), 6.57 (dd, J=9.2, 2.6 Hz, 1H), 6.48 (d, J=2.6 Hz, 1H), 4.09-4.00 (m, 2H), 3.89 (s, 3H), 3.10-3.03 (m, 4H), 2.99-2.90 (m, 2H), 2.84 (s, 3H), 2.61-2.52 (m, 5H), 1.85-1.77 (m, 2H), 1.50-1.37 (m, 2H).

Provenance & Evidence