Acetic Anhydride → HCID 15586530, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.5 g of 9-fluoro-11β-hydroxy-17-(methylsulfinyl)androsta-1,4,16-trien -3-one, 70 ml of acetic anhydride and 2 g of fused sodium acetate is heated at 110° C. under nitrogen for 2 hours. The acetic anhydride is partially removed by distillation under vacuum and the resulting slurry is diluted with 1:1 chloroform-water. The organic layer is separated, washed with diluted sodium bicarbonate solution, water, dried over anhydrous sodium sulfate and evaporated in vacuo. The residue is dissolved in 4:1 chloroform-hexane and chromatographed on a 40 g-silica gel column. Elution with 1:4 hexane-chloroform gives 940 mg of slightly impure material. Two crystallizations from acetone-hexane give 350 mg of the title compound, melting point 193°-194° C., with consistent spectral data.

Provenance & Evidence