Process for the synthesis of vitamin A and certain ones of deriv

Details Process for the synthesis of vitamin A and certain ones of deriv Process for the synthesis of vitamin A and certain ones of deriv

1992-04-21

1993-03-02

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

C07C 6702

Patent

active

051911108

ABSTRACT:
According to this process, one effects a stereospecific reduction of the two hydroxyl groups of an ether-diol by a mixture (titanium trichloride, lithium aluminum hydride) at a temperature between 5.degree. C. and about 40.degree. C. and that optionally, one converts the resulting ether into vitamin A, retinol or retinoic acid.
Application to the synthesis of all-trans compounds selected from the group consisting of vitamin A and its ethers, retinol and retinoic acid, and their 13-cis isomers.

REFERENCES:
patent: 2577538 (1951-04-01), Milas
J. Am. Chem. Soc., 1982, pp. 5807-5808, American Chemical Society, Walborsky et al.

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