11β-Hydroxyandrost-4-ene-3,17-dione (III) was converted into a potential metabolite of epitestosterone - 11β,17α-dihydroxyandrost-4-en-3-one (II) in 5 steps, including the inversion of configuration of a 17β-hydroxy group. This inversion was not feasible in the preparation of the analogues X, XIV, XX, and XXII, where the 17α-hydroxy group was introduced first and only then was the rest of the molecule modified.
11β-羟基雄烯-4-烯-3,17-二酮(III)经过5个步骤转化为表睾酮的一种潜在代谢产物 - 11β,17α-二羟基雄烯-4-烯-3-酮(II),包括17β-羟基的构型反转。这种反转在类似物X、XIV、XX和XXII的制备中是不可行的,因为首先引入了17α-羟基,然后才修改了分子的其余部分。