Process for the preparation of vitamin A and intermediate compounds which are useful for this process
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United States of America Patent
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Sep 12, 1995
Issued Date -
N/A
app pub date -
Jan 5, 1995
filing date -
Dec 7, 1992
priority date (Note) -
Expired
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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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