Preparation of canthaxanthin and astaxanthin

Details Preparation of canthaxanthin and astaxanthin Preparation of canthaxanthin and astaxanthin

1991-04-29

1993-05-11

Dees, Jose G.

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

Organic compounds

Oxygen containing

568346, 568377, 568378, C07C 4561, C07C 4565

Patent

active

052103145

ABSTRACT:
A process for preparing canthaxanthin (Ia) and astaxanthin (Ib) of the formula I ##STR1##
where R is H (a) or OH (b), comprises reacting a tertiary alcohol of the formula II ##STR2##

REFERENCES:
patent: 3006939 (1961-10-01), Pommer et al.
patent: 4088689 (1978-05-01), Rosenberger
patent: 4098827 (1978-07-01), Rosenberger
patent: 4156090 (1979-05-01), Kienzle
patent: 4245109 (1981-01-01), Mayer et al.
patent: 4283559 (1981-08-01), Broger et al.
patent: 4585885 (1986-04-01), Bernhard et al.
J. Org. Chem. 47 (1982) pp. 2130-2134.

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