Title:
市販のルテインからのβ-クリプトキサンチンおよびα-クリプトキサンチンの製造方法
Document Type and Number:
Japanese Patent JP4834290
Kind Code:
B2
Abstract:
The present invention relates to a method of reacting (3R,3'R,6'R)-lutein with a catalytic amount of an acid to obtain a mixture of anhydroluteins, rich in anhydrolutein III, with substantially no Z-isomers being formed. The mixture is converted to (3R)-beta-cryptoxanthin (major product) and (3R,6'R)-alpha-cryptoxanthin (minor product) by reacting the anhydroluteins with borane-amine complexes (e.g. Me3N.BH3) or other hydride donors and an acid in a chlorinated solvent, preferably dichloromethane, at ambient temperature to produce (3R)-beta-cryptoxanthin and (3R,6'R)-alpha-cryptoxanthin.
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Inventors:
Cassique Frederick
Application Number:
JP2003565924A
Publication Date:
December 14, 2011
Filing Date:
February 06, 2003
Export Citation:
Assignee:
University of Maryland College Park
International Classes:
C07C29/60; C07B61/00; C07C1/00; C07C29/00; C07C29/17; C07C29/56; C07C29/78; C07C35/21; C07C41/09; C07C43/196; C07C45/28; C07C403/24; C07C
Foreign References:
| GB1081104B |
Attorney, Agent or Firm:
Hatsushi Shimizu
Koichi Niimi
Koichi Niimi