Process for manufacturing polyene aldehydes

Details Process for manufacturing polyene aldehydes Process for manufacturing polyene aldehydes

1997-05-29

1999-07-27

Kumar, Shailendra

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

Organic compounds

Oxygen containing

568446, 568449, 568459, C07C 4560

Patent

active

059292881

ABSTRACT:
To manufacture polyene aldehydes and polyene dialdehydes a polyene O,O-dialkyl acetal or polyene di(O,O-dialkyl acetal) is reacted with a 1-alkoxy-1,3-diene in the presence of a Lewis acid or a Bronsted acid. The reaction mixture is then hydrolyzed and the alcohol is cleaved under basic conditions from the polyene derivative produced by the reacting. Those intermediates in this process from which the alcohol is to be cleaved are novel. The final products are primarily carotenoids which can be used as colorants and pigments for foodstuffs, animal products, and the like.

REFERENCES:
Greene et al; Protective Groups in Organic Synthesis, pp. 125-126, 1981.
Mukaiyama et al; Bull.Chem.Soc.(Japan),50(5),pp. 1161-1168, 1977. (1958). (1961). (1962). (1962).
S.M. Makin, Pure & Appl. Chem. 47, pp. 173-181 (1976).
Chem. Abstract vol. 57, No. 13, Dec. 24, 1962, Abstract No. 16671c.
Chem. Abstract vol. 52, No. 14, Jul. 25, 1958, Abstract No. 17737c.

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