Sodium Sulfate → HCID 53747454, compound

Participants

Reaction Steps

A solution of m-chloroperbenzoic acid (mCPBA), prepared by suspending 41.4 g (0.021 mol) of 50% mCPBA in 100 ml of dichloromethane, adding a drying agent (sodium sulfate), and removing the solids by filtration, was added dropwise to a solution of 22.2 g (0.12 mol) of 2-chloro-3-pyridinecarboxylic acid ethyl ester (Aldrich, 1001 West Saint Paul Avenue, Milwaukee, Wis. 53233 USA) in 100 ml of dichloromethane. After stirring the mixture for 36 hours, the precipitate was removed by filtration and the filtrate was evaporated. The residue was dissolved in ethyl acetate, washed successively with saturated aqueous sodium bisulfite solution (1×100 ml) and sodium bicarbonate solution (2×100 ml), dried (Na2SO4), and evaporated. The residue was purified by flash chromatography with an ethyl acetate-hexane eluant (5:95 to 100:0) to afford 8.1 g (33%) of the title compound as an oil. 1H NMR (CDCl3): δ 1.35 (3H, t, J=7), 4.36 (2H, q, J=7), 7.23-7.29 (1H, m), 7.61 (1H, d, J=7), 8.41 (1H, d, J=7).

Provenance & Evidence