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Beilstein J. Org. Chem. 2021, 17, 581–588, doi:10.3762/bjoc.17.52
Graphical Abstract
Figure 1: A) Tetracyclic core of steroids and possible sites of bond cleavages for secosteroids. B)The first ...
Scheme 1: Retrosynthetic analysis of 9,11-secosterols.
Scheme 2: Synthesis of starting materials. Reagents and conditions: i) NaBH4, EtOH/CH2Cl2 1:1, 2 h, rt, then ...
Scheme 3: Oxidation of diols 5 and 6 with NaOCl·5H2O.