反应详情

Suspend sodium hydride (3.7 g, 93 mmol) in DMF (50 mL) and add a solution of 2-chloro-5-hydroxypyridine (10 g, 77 mmol) in DMF (20 mL) dropwise over 45 min. Stir the resulting solution at room temperature for 1.5 hours. Add chloromethylmethyl ether (6.6 mL, 86 mmol) dropwise over 45 min. Stir the resulting mixture at room temperature for 12 hours. Dilute the mixture with ethyl acetate, water, and saturated aqueous sodium chloride. Isolate the organic solution and wash with three portions of water, one portion of saturated aqueous sodium chloride, dry over sodium sulfate, filter, and concentrate in vacuo. Purify the crude product by column chromatography on 330 g of silica gel eluting with a gradient from hexane to 30% ethyl acetate in hexane over 20 min and then hold at 30% ethyl acetate in hexane for 30 min to give the title compound (10.8 g, 81%) as a clear oil. MS (ES) m/z 174.0 [M+1]+.

1. stirringStir the resulting mixture at room temperature for 12 hours
2. customIsolate the organic solution
3. washwash with three portions of water, one portion of saturated aqueous sodium chloride
4. dry with materialdry over sodium sulfate
5. filtrationfilter
6. concentrationconcentrate in vacuo
7. customPurify the crude product by column chromatography on 330 g of silica gel eluting with a gradient from hexane to 30% ethyl acetate in hexane over 20 min
8. waithold at 30% ethyl acetate in hexane for 30 min