Bromine → HCID 18399625, compound

Participants

Reaction Steps

A solution of 0.70 mL of bromine in 3.45 mL of acetic acid was added dropwise over a period of 60 minutes to a solution of 3.56 g of Compound 3A in 34.5 ml, of acetic acid at 20-25° C. while stirring. After stirring further for 2.5 hours at 20-25° C., the mixture was poured into ice water and extracted with diethyl ether (2×80 mL). The combined organic layers were washed with water (2×80 ml), 10% aqueous sodium carbonate (100 mL) and water (3×80 mL), dried over sodium sulphate and evaporated to dryness in vacuo. The crude product was purified by flash chromatography in n-hexane/chloroform (6:4) to yield 1.31 g (29%) of Compound 3B.

Provenance & Evidence