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  • Title: Synthesis of mixed esters of ascorbic acid using methyl esters of palm and soybean oils.
    Author: Hsieh HJ, Chen JW, Giridhar R, Wu WT.
    Journal: Prep Biochem Biotechnol; 2005; 35(2):113-8. PubMed ID: 15881593.
    Abstract:
    Mixed esters of ascorbic acid were synthesized using methyl esters of palm and soybean oils as acyl donors, in acetone at 50 degrees C, and catalyzed by Novozym 435. A conversion of 62% was obtained with palm oil methyl ester at an ascorbic acid to acyl donor molar ratio of 1:4; the mixed ester contained 45.89% ascorbyl palmitate, 42.59% ascorbyl oleate and 10.1% ascorbyl linoleate. Acylation with soybean oil methyl ester resulted in 17% conversion, yielding a mixed ester containing 10.08% ascorbyl palmitate, 20.68% ascorbyl oleate, and 64.96% of ascorbyl linoleate. The mixed esters of ascorbic acid can find direct use in food and cosmetics.
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