Diethyl chlorophosphate → HCID 20080829, compound

Participants

Reaction Steps

To a solution of 3-Bromo-5-(4-(4-trifluoromethoxyphenoxy)phenyl)-2,6-dimethyl pyridin-4(1H)-one (4.44 g) in dry DMF (30 ml) under nitrogen was added sodium hydride (0.39 g of a 60% dispersion in mineral oil). After stirring at rt for 30 min diethyl chlorophosphate (2.1 ml) was added dropwise. The mixture was stirred at rt for 48 hr then filtered. The filtrate was diluted with toluene (200 ml), washed with 2M sodium carbonate, dried over magnesium sulphate and concentrated in vacuo. The residue was chromatographed on silica, eluting with 1:4 ethyl acetate:dichloromethane to afford the title compound (1.22 g), m.p. 80°-81°, NMR δH (CDCl3) 7.35-7.0 (8H, m), 4-3.8 (4H, m), 2.7 (3H, s), 2.25 (3H, s), 1.25-1.15 (6H, 2×t).

Provenance & Evidence