Various esters of retinol (vitamin A) have been synthesized in high yields from fatty acids in one step, at room temperature in the presence of 4‐dimethylaminopyridine and dicyclohexylcarbodiimide. Under anhydrous conditions, this technique avoids the occurrence of undesirable substances. The esters are separated quickly and efficiently from unreacted starting materials by flash chromatography on a silica gel column with a hexane/ether mixture as elution solvent.
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Azaı̈s-Braesco et al. (1992) studied this question.
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