Preparation of astaxanthin

Details Preparation of astaxanthin Preparation of astaxanthin

1996-03-15

1997-08-05

McKane, Joseph

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

Organic compounds

Oxygen containing

568343, 568352, C07C 4500

Patent

active

056544880

ABSTRACT:
Improved process for the preparation of astaxanthin by Wittig reaction of 2 mol of 3-methyl-5-(2,6,6-trimethyl-3-oxo-4-hydroxy-1-cyclohexenyl)-2,4-pentadieny ltriarylphosphonium salts with one mol of 2,7-dimethyl-2,4,6-octatrienedial avoiding the use of halohydrocarbons as solvents.

REFERENCES:
patent: 3078256 (1963-02-01), Wittig et al.
patent: 3989758 (1976-11-01), Ruegg et al.
patent: 4156090 (1979-05-01), Kienzle
patent: 4952716 (1990-08-01), LuKac et al.
patent: 5210314 (1993-05-01), Ernst et al.
patent: 5455362 (1995-10-01), Ernst et al.
Helv. Chim. Acta 64 (1981) pp. 2405-2418, 2436-2446, 2447-2462.
"Carotenoids", O. Ister, Birkhauser-Verlag (1971), pp. 140-141.

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