Hydrogen Bromide → HCID 15460158, compound

Participants

Reaction Steps

2.42 g (10 mmol) of 5-(3-chlorophenyl)indan-1-one are dissolved in 30 ml of glacial acetic acid and, after addition of 10 μl of a 48% strength HBr solution in water, treated dropwise while stirring with a solution of 0.77 ml (15 mmol) of bromine in 7 ml of glacial acetic acid. After the reaction mixture has been stirred at room temperautre for 3 h, it is poured into a mixture of 100 g of ice with 70 ml of water and 100 mg of NaHSO3and stirred. The resulting 25 suspension is extracted by shaking with 200 ml of dichloromethane, and the organic phase is then washed with water (3×100 ml), dried over magnesium sulfate, concentrated in vacuo and purified by chromatography on silica gel with toluene/ethyl acetate 50/1. 2-Bromo-5-(3-chlorophenyl)indan-1-one, is obtained with a melting point of 110° C., in addition to a little 2,2-dibromo-5-(3-chlorophenyl)indan-1-one.

Provenance & Evidence