The procedure used for the preparation of 1α-hydroxycholesterol from cholesta-1, 4-dien-3-one was applied to 17, 17-ethylenedioxyandrosta-1, 4-dien-3-one and 20, 20-ethylenedioxypregna-1, 4-dien-3-one. The successful results described in this paper serve to provide a basis for evaluation of wide scope of this procedure for the introduction of a hydroxyl group at 1α-position of 3-oxygenated steroid derivatives. The procedure consists of three steps starting from 3-keto-△1, 4-steroids available readily from 3-oxygenated steroids : 1) deconjugation to 3-keto-△1, 5-steroids, 2) reduction with metalhydride to 3β-hydroxy-△1, 5-steroids, and 3) hydroboration to 1α, 3β-dihydroxy-△5-steroids. This paper also includes definite identification of the final and intermediate compounds in the procedure and interpretation of their mass and nuclear magnetic resonance spectroscopic behaviors.
从胆甾-1,4-二烯-3-酮制备 1α-羟基
胆固醇的程序被应用于 17,17-亚乙二氧基雄甾-1,4-二烯-3-酮和 20,20-亚乙二氧基孕甾-1,4-二烯-3-酮。本文所描述的成功结果为评估该程序在 3 氧甾体衍
生物 1α 位引入羟基的广泛应用范围提供了依据。该过程包括三个步骤,从 3-酮-△1,4-类
固醇开始:1)脱共轭为 3-酮-△1,5-类
固醇;2)用
金属酸酐还原为 3β-羟基-△1,5-类
固醇;3)氢
硼化为 1α,3β-二羟基-△5-类
固醇。本文还包括在该过程中最终和中间化合物的明确鉴定,以及对其质量和核磁共振光谱行为的解释。