反应详情

A mixture of methyl 1-(6-acetoxy-2-naphthoyl)piperidine-4-carboxylate (1 g, 2.814 mmol, 1.0 eq), K2CO3 (1.94 g, 14.07 mmol, 5.0 eq) in MeOH (20 mL) was stirred at room temperature for 2 h. The reaction was filtered. The filtrate was concentrated and the residue was purified by prep-HPLC (MeOH: 0.05% TFA/H2O=0-95%) to afford methyl 1-(6-hydroxy-2-naphthoyl)piperidine-4-carboxylate as a white solid (350 mg, yield: 40%). ESI-MS: 314.0 (M+H)+. 1HNMR (400 MHz, DMSO-d6) δ: 9.94 (s, 1H), 7.86-7.84 (m, 2H), 7.73 (d, 1H), 7.38 (d, 1H), 7.16-7.12 (m, 2H), 3.63 (s, 3H), 3.16-2.97 (m, 2H), 2.69-2.63 (m, 3H), 1.96-1.79 (m, 2H), 1.61-1.51 (m, 2H).

1. filtrationThe reaction was filtered
2. concentrationThe filtrate was concentrated
3. customthe residue was purified by prep-HPLC (MeOH: 0.05% TFA/H2O=0-95%)