2-(2,4-Dichlorophenoxy)ethanol → 1-(2-Bromoethoxy)-2,4-dichlorobenzene

Participants

Reaction Steps

To a solution of 10.0 g of 2-(2,4-dichlorophenoxy)-1-ethanol in 1,2-dimethoxyethane (200 ml) was added dropwise a solution of 14 g of phosphorus tribromide in 1,2-dimethoxyethane (20 ml) under ice-cooling. The reaction solution was stirred at room temperature for 20 hours. After the reaction solution was concentrated, the residue was diluted with water and ethyl acetate. Saturated aqueous sodium hydrogencarbonate was added to the organic layer, and the resulting emulsion formed was subjected to Celite filtration. The filtrate was diluted with diethyl ether and saturated aqueous ammonium chloride. The organic layer was dried over anhydrous magnesium sulfate and concentrated. The residue was purified by silica gel column chromatography, to give 6.15 g of the title compound as a pale yellow oil.

Provenance & Evidence