反应详情

To a solution of ethyl 4-benzylpiperidine-4-carboxylate (0.46 g, 1.86 mmol) in EtOH (10.0 mL) was added DIPEA (0.80 mL, 4.65 mmol) at rt which was stirred at rt for 10 minutes followed by addition of 5-bromo-2-chloropyrimidine (0.30 g, 1.55 mmol). The reaction was heated up to 70° C. for 1 h. After completion of reaction (by TLC), solvent was evaporated and the crude residue purified over 100-200 M silica-gel using 4% EtOAc:hexane to obtain the desired product as a yellow solid (0.108 g, 45% yield). 1H NMR (DMSO-d6): δ 1.16 (t, J=7.20 Hz, 3H), 1.47 (m, 2H), 2.00 (m, 2H), 2.80 (s, 2H), 2.97 (m, 2H), 4.08 (q, J=7.20 Hz, 2H), 4.40 (m, 2H), 7.02 to 7.27 (m, 5H) and 8.43 (s, 2H).

1. temperatureThe reaction was heated up to 70° C. for 1 h
2. customAfter completion of reaction (by TLC), solvent
3. customwas evaporated
4. customthe crude residue purified over 100-200 M silica-gel