For the purpose of identifying a urinary metabolite of 17α-acetoxy-6-chloro-4, 6-pregnadiene-3, 20-dione (I, chlormadinone acetate) in the rabbit, 17α-acetoxy-6-chloro-2α, 3β-dihydroxy-4, 6-pregnadien-20-one (V), which was found to be identical with the metabolite, was synthesized from I. The starting material (I) was converted to the 2α-and 2β-acetoxy compounds (II and III) on heating with lead tetraacetate in acetic acid. When II and III were reduced with sodium borohydride in anhydrous isopropanol, two 2, 3-dihydroxy compounds (V and VI) were produced. These two diols were found to be 2α, 3β-diol (V) and 2β, 3β-diol (VI), It was also found that both diols formed acetonides. 17β-acetoxy-4-androstene-2α, 3β-diol (XIII) could be also transformed into the acetonide.
为了鉴定兔尿中 17α-acetoxy-6-chloro-4, 6-pregnadiene-3, 20-dione (I,
醋酸氯地孕酮)的代谢物,从 I 合成了 17α-acetoxy-6-chloro-2α, 3β-dihydroxy-4, 6-pregnadiien-20-one (V),发现它与代谢物相同。起始物质(I)在
乙酸中与四
乙酸铅加热后,转化为 2α 和 2β 乙酰氧基化合物(II 和 III)。在无
水异丙醇中用
硼氢化钠还原 II 和 III 时,生成了两种 2,3-二羟基化合物(V 和 VI)。这两种二元醇分别是 2α,3β-二元醇(V)和 2β,3β-二元醇(VI)。17β-乙酰氧基-4-雄烯-2α,3β
-二醇(XIII)也可以转化为
丙酮。