Abstract
The circular dichroism method has been used to study the stereochemistry of the carotanes. An analysis of the results obtained has shown that an α-oriented ester group at C6 corresponds to a positive Cotton effect (CE) in the 240–260-nm region. A link has been established between the position of the carbonyl group in the ring B and the sign of a CE in the 340-nm region. Hydrolysis of an ester group at C6 takes place more readily in an alkaline medium than in an acid medium, and in the case of carbonyl-containing carotanes dehydration takes place as well as hydrolysis.
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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. 1, pp. 45–48, January–February, 1984.
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Moiseeva, G.P., Yusupova, I.M., Saidkhodzhaev, A.I. et al. Circular dichroism of some carotanes. Chem Nat Compd 20, 42–45 (1984). https://doi.org/10.1007/BF00574788
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DOI: https://doi.org/10.1007/BF00574788