反应详情

温度

65 °C

Combine 4-hydroxy-cis-2-methyl-piperidine-1-carboxylic acid tert-butyl ester isomer 2 (preparation 3, 0.986 g) in DMF (10 mL) and add to a suspension of sodium hydride (95%, 0.127 g) in DMF (10 mL) and heat in an oil bath at 65° C. After 30 min., add 1-bromo-3-fluoro-benzene (0.96 g) and heat at 65° C. After 18 hr., partition between ethyl acetate-hexane (1:4) and saturated aqueous NaCl, dry over anhydrous sodium sulfate, evaporate and purify on a 35 g silica gel column eluting with ethyl acetate-hexane (1:9) to give the title compound as a colorless oil (0.759 g). 1H NMR (CDCl3): 7.13 (dd, 1H), 7.05 (ddd, 1H), 7.04 (m, 1H), 6.81 (ddd, 1H), 4.63 (m, 1H), 4.35 (m, 1H), 3.88 (m, 1H), 3.23 (m, 1H), 1.90 (m, 3H), 1.73 (m, 1H), 1.46 (s, 9H), 1.27 (d, J=7.0 Hz, 3H).

1. temperatureheat at 65° C
2. waitAfter 18 hr
3. custom, partition between ethyl acetate-hexane (1:4) and saturated aqueous NaCl
4. dry with materialdry over anhydrous sodium sulfate
5. customevaporate
6. custompurify on a 35 g silica gel column
7. washeluting with ethyl acetate-hexane (1:9)