反应详情

1.0 g of 3-cyanoandrosta-3,5-diene-17β-carboxylic acid [prepared as described in step (b) above], 1.0 ml of diphenylmethylamine and 1.0 ml of triethylamine were dissolved in 10 ml of dry methylene chloride, and 0.75 ml of diethyl cyanophosphate was added to the resulting solution at room temperature. The reaction mixture was stirred at room temperature overnight, after which it was diluted with 100 ml of methylene chloride, and then washed with 1N aqueous hydrochloric acid, with water, with an aqueous solution of sodium hydrogen-carbonate and with a saturated aqueous solution of sodium chloride, in that order. The solution was then dried over anhydrous magnesium sulfate, after which it was concentrated by evaporation under reduced pressure. The resulting residue was subjected to column chromatography through 40 g of silica gel using a gradient elution method, with mixtures of acetone and methylene chloride in ratios ranging from 1:99 to 4:96 by volume as the eluent, to give 0.85 g of the title compound.

1. washwashed with 1N aqueous hydrochloric acid, with water, with an aqueous solution of sodium hydrogen-carbonate and with a saturated aqueous solution of sodium chloride, in that order
2. dry with materialThe solution was then dried over anhydrous magnesium sulfate
3. concentrationafter which it was concentrated by evaporation under reduced pressure
4. washa gradient elution method