反应详情

Dissolve 4-[4-(3-chloro-4-fluoro-phenyl)-1H-imidazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester (5.29 g; 13.93 mmol); powdered KOH (111.46 mmol; 6.95 g) in DMSO (69 mL) and heat to 40° C. for 10 min. Add 2-(2-bromoethoxy)tetrahydro-2H-pyran (34.83 mmol; 5.48 mL) dropwise over 45 min, then stir for 30 min. Cool and dilute with EA and wash with 3×300 mL saturated sodium bicarbonate, brine, dry over MgSO4, filter and evaporate. Purify on 400 g silica gel with 0-10% EA/DCM to provide the title compound (6.848 g, 97%). MS (ES): m/z=508 (M+H).

1. temperatureCool
2. washwash with 3×300 mL saturated sodium bicarbonate, brine
3. dry with materialdry over MgSO4
4. filtrationfilter
5. customevaporate
6. customPurify on 400 g silica gel with 0-10% EA/DCM