Diiodomethane → Methyl 3-cyclopropylpyridine-2-carboxylate

Participants

Reaction Steps

To a stirred solution of diiodomethane (2.46 g, 9.20 mmol) in dry DCM (5 ml) at −10° C. was added diethyl zinc in hexane (1 M, 9.2 ml, 9.20 mmol). The reaction was stirred for 30 minutes under nitrogen. To this was then added methyl 3-ethenylpyridine-2-carboxylate (0.30 g, 1.84 mmol) as a solution in DCM (5 ml) over a 15 minute period. The reaction was then allowed to warm to room temperature and was stirred at room temperature for 15 hours. The reaction mixture was diluted with a saturated solution of ammonium chloride (25 ml) and the organics were extracted with ethyl acetate (3×30 ml). The combined organics were washed with water (25 ml), brine (25 ml), dried over sodium sulfate and concentrated in vacuo. The resulting residue was purified by column chromatography (silica, 0-15% ethyl acetate/n-hexane to afford the title compound.

Provenance & Evidence