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本文研究了β-胡萝卜素在弱碱条件下用高锰酸钾氧化制备β-阿朴-δ＇-胡萝卞醛。探讨了反应机理,提出了用苯作中间体的猝灭剂,保护醛基不被进一步氧化.研究了影响胡萝卜醛产率的因素,得到了最佳反应条件,产率甲文献报导的10%提高到41.5%。用 IR,MS 鉴定了产物的结构,讨论了质谱中碎片离子的断裂机理,自动氧化实验表明:胡萝卜醛中双键比醛基更容易氧化。
In this paper, β-carotene was oxidized by potassium permanganate to prepare β-apo-δ’-carotene aldehyde under weak alkaline conditions. The mechanism of the reaction was discussed and the quencher was proposed to protect the aldehyde from further oxidation by using benzene as the intermediate.According to the factors influencing the yield of carrot aldehyde, the optimum reaction conditions were obtained.The yield was 10% Increase to 41.5%. The structure of the product was identified by IR and MS, and the fragmentation mechanism of fragment ions in mass spectrometry was discussed. The auto-oxidation experiments showed that the double bond in carotenal is more easily oxidized than the aldehyde.