(Z)- and (R)-6,9-dioxocyclodex-3-enyl derivatives, 5 and 6, respectively, obtained by HgO/I2 oxidation of 5-hydroxy-8-oxo-8,14-seco-5α-androstane-3β,17β-diyl diacetate (3), undergo an unusual intramolecular rearrangement to give the corresponding unsaturated (5R,9R)- and (5R,9S)-spiro-lactones 7 and 8, respectively. Hydroxylation of the CC bond in 7 and 8, and subsequent glycol cleavage of the resulting
在AcOH中加热后,通过HgO / I 2氧化5-羟基-8-oxo-8分别获得立体异构体(Z)-和(R)-6,9-二氧代
环糊精-3-烯基衍
生物5和6。,14-seco-5α-
雄甾烷3β,17β-二
乙酸二
乙酯(3),经历不寻常的分子内重排,得到相应的不饱和(5 R,9 R)-和(5 R,9 S)-
螺内酯7和8。7和8中CC键的羟基化反应,随后二醇裂解生成的二醇910和10分别提供了差向异构的
螺内酯(5 R,9 S)-11和(5 R,9 R)-14,在两种情况下都含有含D环的片段12和13。