Synthesis of L-ascorbic Acid Cinnamic Acid Ester and Its Antioxidant Activities
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Abstract:
This experiment was obtained L-ascorbic cinnamic acid ester by esterification with L-ascorbic acid and cinnamic acid as raw materials. Stability of esterification product in solution clear hydroxyl free radical (?OH) and diphenyl generation bitter hydrazine group free radicals (DPPH?) ability were studied using spectrophotometric method. And the corresponding free radical activity was compared with Vc and tertiary butyl hydroquinone (TBHQ). The results showed thatL-ascorbic acid cinnamic acid ester had higher stability than Vc. The DPPH? scavenging ability of the product was similar to that of Vc, with the EC50 values being of 63.96 μmol/L. Its EC50 values for removing ?OH was of 7.84 mmol/L, better than that of TBHQ in high concentration.
