Abstract
A study of the circular dichroism of chlorine-containing guainolides has shown that a negative Cotton effect in the 260-nm region correlates with the trans-linkage of the lactone ring in acroptilin, hyrcanin, chlorohyssopifolin B, elegin, and biebsanin. It has been established that this nature of the linkage does not change on relactonization and hydrogenation. A chloromethylene substituent at C4 causes a bathochromic shift of the lactone Cotton effect.
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Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 650–652, September–October, 1979.
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Moiseeva, G.P., Sham'yanov, I.D., Mallabaev, A. et al. Circular dichroism of some chlorine-containing guaianolides. Chem Nat Compd 15, 569–571 (1979). https://doi.org/10.1007/BF00565926
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DOI: https://doi.org/10.1007/BF00565926