Process for the preparation of vitamin A and new intermediates

Details Process for the preparation of vitamin A and new intermediates Process for the preparation of vitamin A and new intermediates

1995-02-03

1997-06-10

Geist, Gary L.

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

Organic compounds

Oxygen containing

568447, C07C 3518

Patent

active

056377797

ABSTRACT:
A process for the preparation of vitamin A which comprises condensing ethynyl-.beta.-ionol with the acetal of a C.sub.5 allylic halide in the presence of a catalytic amount of a copper-based catalyst and a base; hydrogenating the condensed compound; eliminating the hydroxyl functional group to obtain retinal; and correcting the retinal obtained.

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