Benzaldehyde → 3-Bromobenzaldehyde

Participants

Reaction Steps

To a mixture of 1,2-dichloroethane (250 g) with 98% aluminum chloride (0.65 mol, 88.6 g) was added 97% benzaldehyde (0.50 mol, 54.6 g) over 1 hour at 40° C. After bromine (0.55 mol, 88.0 g) was added over 2 hours at 40° C., this mixture was stirred for 2 hours at the same temperature. After the reaction mixture being added to ice water (375.0 g) and stirred thoroughly, this was allowed to stand and separated. The organic phase was washed with 100 ml of water, further with 100 ml of 0.5% aqueous solution of sodium carbonate, and finally with 100 ml of water. Then, 241.0 g of solvent were recovered and the residue was distilled, obtaining 83.5 g of 3-bromobenzaldehyde.

Provenance & Evidence