Process for the preparation of vitamin A and intermediate compou

Details Process for the preparation of vitamin A and intermediate compou Process for the preparation of vitamin A and intermediate compou

1995-01-05

1995-09-12

Lone, Werren B.

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

Organic compounds

Oxygen containing

568591, 568592, 568600, 568824, C07C 4330, C07C 43313

Patent

active

054498368

ABSTRACT:
A process for the preparation of vitamin A which preferably comprises bringing cyclogeranyl sulphone into contact with a C.sub.10 aldehyde acetal, halogenating the derivative obtained and then removing the halogen group and the sulphone, removing the acetal group and isomerizing the retinal obtained to the desired configuration. Also disclosed are compounds useful as intermediates in the synthesis of vitamin A and processes for preparation of these intermediate compounds.

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patent: 5362918 (1994-11-01), Aizawa et al.

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