METHOD FOR SYNTHESISING VITAMIN A
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United States of America Patent
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Oct 7, 2021
app pub date -
Aug 19, 2019
filing date -
Aug 20, 2018
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Abstract
A method for preparing dehydro-cyclofarnesal from dehydro-farnesal by cyclization in the presence of an acid may include the dehydro-farnesal being obtained from the farnesal by dehydrogenation and may further includes the cyclization being carried out in the presence of an acid selected from Lewis acids, Bronstedt acids, and zeolites. The synthesis of vitamin A using this method further includes the conversion of dehydro-cyclofarnesal into vitamin A.
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