反应详情

A solution of chloroacetamide 6 (41 mg; 0.118 mmol), piperidine 7.8 (27 mg; 0.132 mmol) and DIPEA (30 μL; 0.172 mmol) in 2.5 mL of 3:2 acetonitrile:THF was reacted at rt for 8 days; whereupon the reaction was concentrated on a rotary evaporator then purified on silica gel (20 mL) with 12:1 EtOAc:i-PrOH yielding a glassy material. A solution of the product in DCM plus hexanes was evaporated leaving a white solid (23 mg; 38%). LC (method B) tR=12.8 min; 1H NMR (200 MHz, CDCl3) δ 9.53 (brs, 1H), 8.37 (m, 2H), 7.48 (m, 3H), 7.22 (s, 1H), 7.08 (m, 2H), 6.84 (m, 3H), 6.62 (brs, 1H), 5.50 (brt, J=5.5 Hz, 1H), 3.79 (s, 3H), 3.68 (m, 2H), 3.53 (m, 2H), 3.10 (s, 2H), 2.88 (m, 2H), 2.54 (m, 2H), 2.20 (m, 2H), 1.85 (s, 3H), 1.80-1.20 (m, 5H); ESIMS 517.0 (28) [MH+], 259.1 (100).

1. concentrationwhereupon the reaction was concentrated on a rotary evaporator
2. customthen purified on silica gel (20 mL) with 12:1 EtOAc
3. customA solution of the product in DCM plus hexanes was evaporated
4. customleaving a white solid (23 mg; 38%)