Hydrochloric Acid → 27238-13-7

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl benzoylacetate (10 g, 52.03 mmol) was added DMAP (699.2 mg, 5.72 mmol), HMPA (9.96 mL, 57.23 mmol), TEA (7.98 mL, 57.23 mmol). The resulting yellow solution was stirred at 0° C. for 30 minutes and then coiled to −20° C. Diethyl chlorophosphate was added dropwise to the cooled solution and a heavy precipitate began to form immediately. The yellow-orange paste was warmed to room temperature and stirred for another 4 hours. The reaction mixture was diluted with ether and acidified with 1N HCl. The ethereal extracts were washed with saturated aqueous CuSO4 to remove HMPA, dried over MgSO4, and concentrated. The residue was purified through flash column chromatography on silica gel (EtOAc:hexanes=2:3) to give 11.6 g in 68% yield.

Provenance & Evidence