5-Bromo-1-indanone → 5-bromo-2,3-dihydro-1H-inden-1-ol

Participants

Reaction Steps

To a suspension of 40 g (184 mmol) of 5-bromo-1-indanone in 500 mL of methanol in a water bath was added 16.2 g of sodium borohydride portionwise, keeping the reaction temperature below 40° C. The water bath was removed and the reaction mixture stirred at ambient temperature for 2 h and then quenched by the addition of 100 mL of water. The methanol was removed in vacuo, and the residue partitioned between water and ethyl acetate. The aqueous phase was extracted with two portions of ethyl acetate. The combined organic phases were washed with saturated aqueous sodium chloride solution, dried over sodium sulfate, and concentrated to give a yellow solid which was used without further purification. Mass spectrum (MS): m/z 195, 197 (M+1-H2O), 116 (M+1-H2O-HBr).

Provenance & Evidence