反应详情

温度

55 °C

To a solution of tert-butyl 4-(5-chloro-3-(methoxycarbonyl)-2-methylphenoxy)piperidine-1-carboxylate (250 mg, 0.651 mmol) in methanol (1.0 mL) was added 6 N NaOH (2.1 mL, 13.03 mmol). The reaction was heated at 55° C. for 18 h. The reaction was cooled to RT and concentrated in vacuo. The residue was then suspended in water and acidified with 1N HCl solution, filtered, and dried to give 3-((1-(tert -butoxycarbonyl)piperidin-4-yl)oxy)-5-chloro-2-methylbenzoic acid (0.180 g, 0.487 mmol, 75% yield). 1H NMR (400 MHz, DMSO-d6) δ 1.41 (s, 9 H) 1.56 (m, J=12.47, 8.31, 4.14, 4.14 Hz, 2 H) 1.76-1.97 (m, 2 H) 2.23-2.35 (m, 3 H) 3.19-3.31 (m, 2 H) 3.48-3.63 (m, 2 H) 4.70 (dt, J=7.26, 3.82 Hz, 1 H) 7.31 (dd, J=11.37, 2.02 Hz, 2 H) 13.22 (br. s., 1 H). MS(ES) [M+H]+ 370.2.

1. temperatureThe reaction was cooled to RT
2. concentrationconcentrated in vacuo
3. filtrationfiltered
4. customdried