反丁烯二酸-6-L-抗坏血酸甲酯的合成及抑菌性能的研究

The Synthesis of 6-L-ascorbyl Trans-β-alkoxycarbonylacrylate and Study of Its Antimicrobial Activity

采用直接酯化法合成了一种新型抗坏血酸衍生物并具有α,β-不饱和羰基结构的化学防腐剂——反丁烯二酸-6-L-抗坏血酸甲酯(VC酯),合成产率可达53.45%,并对其抑菌效果进行了研究。结果表明,VC酯对大肠杆菌、枯草杆菌、啤酒酵母的最低抑菌浓度及抑菌率分别为1.0g/L,88.83%;0.75g/L,80.47%;0.75g/L,82.12%;其抑菌效果显著优于常用防腐剂苯甲酸钠及山梨酸钾,且高温处理对其抑菌效果无明显影响,表明VC酯对细菌、酵母均具有较强的抑制作用。

A new asymmetrical ester,6-L-ascorbyl trans-β-alkoxycarbonylacrylate, containing α,β-unsaturated carbonyl group structure was prepared via esterification. The antimicrobial activity of 6-L-ascorbyl trans-β-alkoxycar- bonylacrylate was studied. Results showed that 53.45% yield could be obtained. The minimum inhibition concentration and inhibition rate of 6-L-aseorbyl trans-β-alkoxycarbonylacrylate to Escherichia coli, Bacillus subtilis, Saccharo- myces cerevisiae was 1.0 g/L,88.83% ; 0. 75 g/L,80.47% ; 0. 75 g/L,82.12% respectively. Its antimierobial activity was much better than sodium benzoate and postassium benzoate, besides the antimierobial activity did not changed obviously under heat treatment. It was also seen that 6-L-aseorbyl trans-β-alkoxyearbonylaerylate had strong antimicro- bial effects for bacteria and yeasts. It is worth the exploration of further development and application.