| abstract |
A novel 3a ,11,20b -triacyloxy-pregn-9(11)-ene wherein each acyl group is derived from an aliphatic carboxylic acid having 2-7 carbon atoms, and the steroid nucleus does not contain any ketonic groups is obtained in a process in which an appropriate 11-keto pregnane is reacted with the anhydride of an aliphatic acid having from 2-7 carbon atoms. A catalyst may be employed, e.g. p-toluene sulphonic acid, sulphuric acid and perchloric acid. |