Chloromethyl Methyl Ether → 2-chloro-5-(MethoxyMethoxy)pyridine

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Reaction Steps

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 RT for 1.5 h. Add chloromethylmethyl ether (6.6 mL, 86 mmol) dropwise over 45 min. Stir the resulting mixture at RT for 12 h. 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]+.

Provenance & Evidence