Summary
1. The trans-linkage of rings A/B in compounds (I-III) and of rings B/C and E/F in veralodine and the equatorial orientation of the OH group at C3 in isogermine has been confirmed by CD spectroscopy.
2. A relationship has been established between the nature of the substituents and the configurations at C20 and the sign of the CE in the 200 nm region for compounds (I-III).
3. The 22R configuration has been established for veralomidine.
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Additional information
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 630–633, September–October, 1976.
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Moiseeva, G.P., Shakirov, R. & Yunusov, S.Y. Circular dichroism of some steroid alkaloids. Chem Nat Compd 12, 563–565 (1976). https://doi.org/10.1007/BF00565186
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DOI: https://doi.org/10.1007/BF00565186