Hydrochloric Acid → 17beta-[N-(Diphenylmethyl)carbamoyl]androsta-3,5-diene-3-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

0.8 g of N-diphenylmethyl-3-cyanoandrosta-3,5-diene-17β-carboxamide [prepared as described in step (c) above] and 6.0 g of potassium hydroxide were dissolved in a mixture of 14 ml of water and 20 ml of ethylene glycol, and then the mixture was heated under reflux for 16 hours. At the end of this time, the reaction mixture was cooled to room temperature and made acidic by the addition of dilute aqueous hydrochloric acid. The mixture was then extracted three times with methylene chloride. The combined organic extracts were washed with water and with a saturated aqueous solution of sodium chloride, in that order and dried over anhydrous magnesium sulfate. The mixture was then concentrated by evaporation under reduced pressure. The resulting residue was subjected to column chromatography through 35 g of silica gel using a gradient elution method, with mixtures of acetone and methylene chloride in ratios ranging from 2:98 to 12:88 by volume as the eluent, to give 650 mg of the title compound.

Herkunft & Nachweise