Hydrofluoric Acid → HCID 22875678, compound

Participants

Reaction Steps

To a slurry of crude 20-tert-butyldimethylsilyloxy-7β-methyl-5α-4-azapregnane (25.2 g, product of Step 9) in acetonitrile (300 mL) was added an aqueous solution of hydrofluoric acid (12 mL). After stirring for 8 hr at room temperature, the reaction mixture was cooled to 0° C. and saturated sodium bicarbonate solution was slowly added. The mixture was extracted with methylene chloride (3×500 mL) and the combined extracts washed with water, saturated salt solution and dried over anhydrous sodium sulfate. The solvent was removed by rotoevaporation to give the title compound which was used without purification in the subsequent reaction.

Provenance & Evidence