FIELD: organic chemistry of natural substances, chemical technology.
SUBSTANCE: invention relates to the improved method for preparing xanthophylls, in particular, to a method for preparing mono- or polyoxidized xanthophylls. Method involves oxidation of carotinoid in a lower oxidation state as compared with xanthophylls to be prepared from hydrogen peroxide aqueous solution and organic solvent wherein indicated solvent represents a water-insoluble solvent. Indicated reaction is carried out in the presence of iodine-containing compound chosen from the group including iodine, iodine halide derivative and metal iodide. Method allows avoiding using danger and expensive substances and formation of large amounts of salts. The proposed invention is used mainly for oxidation of beta-carotene to form canthaxanthine and oxidation of lutein and zeaxanthine wherein the end substances represent important agents used in preparing food compositions and supplements in animal fodder.
EFFECT: improved method for preparing.
11 cl, 2 dwg, 2 ex
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