Pigmenting efficiency of a natural xanthophyll by isomerization

Details Pigmenting efficiency of a natural xanthophyll by isomerization Pigmenting efficiency of a natural xanthophyll by isomerization

1997-07-18

1999-10-26

Tsang, Cecilia J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568816, 568822, 568823, 568824, 568825, 568832, 568906, 568913, C07C 3508

Patent

active

059732113

ABSTRACT:
A method of isomerizing lutein to yield a mixture of epimers of zeaxanthin includes the following steps: mixing a lutein-containing extract in a glycol solution to obtain a mixture, treating the mixture with alkali to obtain an alkali-containing mixture, reacting the alkali-containing mixture in the presence of heat for a duration consistent with achieving a desired level of isomerization of lutein to zeaxanthin.

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Isomerization of Carotene to B-Carotene and of Lutein to Zeaxanthin, A.G. Andrewes, Short Communications from Acta Chem. Scand. B 28, (1974) No. 1.
Separation of Zeaxanthin and Lutein via the Dicarbamates of Ethyl Isocyanate, A. Ruttimann et al., Journal of High Resolution Chromatography and Chromatography Communications, vol. 6, Nov. 1983, pp. 612-616.
Carotenoids of Higher Plants, A. G. Andrewes et al., Short Communications from Acta Chem. Scand. B28 (1974), No. 1.
The First Isolation of Enanthiomeric and Meso-Zeaxanthin in Nature, Takashi Maoka et al., Comp. Biochem. Physiol., vol. 83B, No. 1, pp. 121-124, 1986.

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