Confirmation of the Absolute (3R,3′S,6′R)‐Configuration of (all‐E)‐3′‐Epilutein |
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| Authors: | Pter Molnr Jzsef Deli Erzsbet &#x;sz Ferenc Zsila Mikls Simonyi Gyula Tth |
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| Institution: | Péter Molnár,József Deli,Erzsébet Ősz,Ferenc Zsila,Miklós Simonyi,Gyula Tóth |
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| Abstract: | Circular dichroism (CD) spectroscopy was used to distinguish between the isomeric (all‐E)‐configured 3′‐epilutein ( 2 ) and 6′‐epilutein ( 8 ) to establish the absolute configuration of epilutein samples of different (natural and semisynthetic) origin, including samples of 2 obtained from thermally processed sorrel. Thus, the CD data of lutein ( 1 ) and epilutein samples ( 2 ) were compared. Our results unambiguously confirmed the (3R,3′S,6′R)‐configuration of all epilutein samples. Compound 2 was thoroughly characterized, and its 13C‐NMR data are published herewith for the first time. |
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