反应详情

温度

80 °C

A mixture of tert-butyl 4-(4-bromophenyl)-4-hydroxypiperidine-1-carboxylate (compound 13.1, 36 g, 101 mmol), Pd(PPh3)4 (11.7 g, 10.1 mmol), and Zn(CN)2 (17.9 g, 152.4 mmol) in DMF (400 mL) under nitrogen was stirred overnight at 80° C. The mixture was cooled to ambient temperature, then the reaction was quenched by the addition of 600 mL of FeSO4 (aq., sat.) and diluted with ethyl acetate. The resulting mixture was stirred vigorously then filtered through Celite® and washed with 1 M FeSO4, water, and ethyl acetate. The layers were separated and the aqueous phase was extracted with ethyl acetate (2×300 mL). The combined organic layers were washed with potassium carbonate (aq., sat., 200 mL), followed by brine (200 mL), dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified using silica gel column chromatography with ethyl acetate/petroleum ether (1:200-1:5) as the eluent to yield 23 g (75%) of the title compound as a white solid.

1. temperatureThe mixture was cooled to ambient temperature
2. customthe reaction was quenched by the addition of 600 mL of FeSO4 (aq., sat.)
3. additiondiluted with ethyl acetate
4. stirringThe resulting mixture was stirred vigorously
5. filtrationthen filtered through Celite®
6. washwashed with 1 M FeSO4, water, and ethyl acetate
7. customThe layers were separated
8. extractionthe aqueous phase was extracted with ethyl acetate (2×300 mL)
9. washThe combined organic layers were washed with potassium carbonate (aq., sat., 200 mL)
10. dry with materialdried (Na2SO4)
11. filtrationfiltered
12. concentrationconcentrated under reduced pressure
13. customThe residue was purified