Abstract
A mixture of all-trans-retinoic acid and iodine in heptane was irradiated. Two oxidation products were isolated by high performance liquid chromatography and identified as all-trans- and 13-cis-4-oxoretinoic acid by nuclear magnetic reasonance, ultra violet, Infrared spectroscopy, and mass spectral analysis. Under the same conditions, but without light, a mixture of all-trans- and 13-cis-retinoic acid resulted. The corresponding methyl esters were obtained when methyl all-trans-retinoate was used in place of all-trans-retinoic acid.
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Mckenzie, R.M., Hellwege, D.M., Mcgregor, M.L. et al. Oxidation and isomerization of retinoic acid by iodine and light: A novel preparation of all-trans- and 13-cis-4-oxoretinoic acid. Lipids 14, 714–717 (1979). https://doi.org/10.1007/BF02533896
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DOI: https://doi.org/10.1007/BF02533896