Research on Chemical Intermediates p. 5901 - 5916 (2017)
Update date:2022-08-29
Topics:
Hui, Ailing
Wang, Yuan
Zhu, Kaili
Chen, Jingchao
Fan, Qingping
Zhou, An
Zhang, Wencheng
Wu, Zeyu
Abstract: An efficient preparation procedure has been proposed for the synthesis of 5,6-di-O-cinnamyl-l-ascorbic acid ester (5,6-CA–AA) and 2-O-cinnamyl-l-ascorbic acid ester (2-CA–AA) via ascorbic acid (AA) and cinnamic acid (CA), and their anti-oxidant and antibacterial activities were also investigated. Among the factors affecting the synthesis efficiency of 5,6-CA–AA and 2-CA–AA, reaction solvent and substrate molar ratio were very important, resulting in 76 and 54% total yield, respectively. Further studies indicated that 5,6-CA–AA maintained the inherent inhibitory ability of AA in α, α-diphenyl-β-picrylhydrazyl radical scavenging assay. Also, it had stronger scavenging activity against hydroxyl radicals than that of standard tert-butylhydroquinone (EC50: 7.84 vs. 8.38?mM). In addition, 5,6-CA–AA and 2-CA–AA possessed comparable antibacterial activity to that of CA. Significantly, the application of ascorbyl cinnamate could retard the lipid oxidation of peanut oil and pork, and the corresponding perioxide value and thiobarbituric acid reactive substance content decreased by 32.0 and 56.5%, respectively. Moreover, the microbial reproduction of the pork treated with mixed ascorbyl cinnamate was attenuated to some extent. These investigations will pave the way for designing more efficient bifunctional derivatives of AA and CA.
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