反应详情

To a stirred mixture of 1-(4-iodophenyl)piperazine (5.76 g, 20 mmol) and K2CO3 (5.44 g, 40 mmol) in acetone (200 mL) was added iodoethane (2.58 mL, 32 mmol) dropwise over 1 min. After addition, the resulting mixture was stirred at rt for 21 h. The resulting precipitate was filtered off and rinsed with EtOAc (2×60 mL). The filtrate was concentrated to dryness to give a whiteish yellow solid. Trituration with MeOH (10 mL) and H2O (250 mL), followed by suction filtration (rinsed with H2O) gave the title compound as a yellow solid (5.37 g, 85%) after drying. 1H NMR (400 MHz, DMSO-d6) δ 7.46 (d, J=7.6 Hz, 2H), 6.76 (d, J=8.0 Hz, 2H), 3.13-3.07 (m, 4H), 2.48-2.43 (m, 4H), 2.34 (q, J=7.2 Hz, 2H), 1.01 (t, J=7.2 Hz, 3H); MS ESI 317.0 [M+H]+, calcd. for [C12H17IN2+H]+ 317.0.

1. additionAfter addition
2. filtrationThe resulting precipitate was filtered off
3. washrinsed with EtOAc (2×60 mL)
4. concentrationThe filtrate was concentrated to dryness
5. customto give a whiteish yellow solid
6. filtrationTrituration with MeOH (10 mL) and H2O (250 mL), followed by suction filtration (rinsed with H2O)