Preparation of 1,2-dibromo-1-ethoxybutane
0.1 mole of bromine is dropped into a stirred and ice cooled mixture of 0.1 mole of butanal and 0.1 mole of ethyl alcohol in 20 ml of benzene containing 20 g of sodium sulfate. After 20 minutes stirring at room temperature the hydrated sodium sulfate is filtered off and the filtrate is worked up by distillation in a vacuum yielding 91% of 1,2-dibromo-1-ethoxybutane, b.p. 89-91°/12 mm.
Chem. Ber., 98, 1673 (1965).