... aldehyde, led to the addition of the 23–27 carbon side chain building block to the steroid backbone. ... The mixture of i-steroids 16 (2.4 g, 4.79 mmol), ZnCl 2 dihydrate (1.58 g, 7.2 mmol), acetic ... off, the filtrate was diluted with anhydrous 1,4-dioxane to 30 ml of final volume, to give ...
