Hydrofluoric Acid → HCID 70635233, compound

Participants

Reaction Conditions

Reaction Steps

2.5 ml of liquid hydrogen fluoride is added to 2.5 ml. of dimethylformamide cooled to -40° C. The reaction mixture is combined with 250 mg. of N-bromosuccinimide, and then 500 mg. of 3β-hydroxy-21-acetoxy-15α,16α-methylene-5-pregnen-20-one, dissolved in 5 ml. of methylene chloride, is introduced into this reaction mixture. The latter is agitated for 5 minutes at -15° C., poured into saturated potassium bicarbonate solution, and extracted with methylene chloride. After drying and evaporation, 700 mg. of crude 6β-fluoro-5-bromo-3β-hydroxy-21-acetoxy-15α,16α-methylene-5α-pregnan-20-one is obtained.

Provenance & Evidence