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过氧酸高选择性氧化木质素β-O-4型二聚体化合物    

Highly selective oxidation of lignin β-O-4 two polymers compound by performic acid

文献类型:期刊文献

中文题名:过氧酸高选择性氧化木质素β-O-4型二聚体化合物

英文题名:Highly selective oxidation of lignin β-O-4 two polymers compound by performic acid

作者:李小红 邹树良

第一作者:李小红

机构:[1]贵州理工学院制药工程学院

第一机构:贵州理工学院食品药品制造工程学院

年份:2016

卷号:0

期号:8

起止页码:244-248

中文期刊名:食品科技

外文期刊名:Food Science and Technology

收录:北大核心:【北大核心2014】;

基金:贵州省科学技术基金项目(黔科合J字[2015]2069号)

语种:中文

中文关键词:β-O-4型二聚体;过氧酸;低聚木糖;选择性氧化

外文关键词:β-O-4 two polymers; performic acid; oligosaccharides; selective oxidation

摘要:降解木质素效果的优良是提取低聚木糖效果的标准。通过过氧酸选择性氧化木质素β-O-4型二聚体,然后通过水解获得有价值的芳香族化学物,该反应获得芳香酯的选择性高达93%。以甲酸为溶剂、过氧甲酸为氧化剂获得3,4-二甲氧基苯乙酮、2-苯甲氧基-1-苯乙酮和1-(3,4-二甲氧基苯基)乙醇、2-苯甲氧基-1-苯乙醇的氧化反应途径及其动力学数据。在反应过程中,反应物中的二级醇不仅可以氧化到酮,而且可以直接氧化到相应的酯。这为低聚木糖的提取提供了更为简便的方法。
The reaction pathways and kinetics of the oxidation reactions of ketones(1-(3,4-dimethoxyphenyl) ethanone(DMOAP), 2-phenoxy-1-phenylethanone(POPAO)) and secondar y alcohols(1-(3,4-dimethoxyphenyl) ethanol(MVA), 2-phenoxy-1-phenylethanol(POPEO) with performic acid(PFA) were investigated in formic acid solvent. An unexpected new reaction pathway, from which the secondary alcohols can be directly oxidized to corresponding esters, was found. The reaction products(esters and ketones) of oxidation of MVA and POPEO were detected at different reaction times. The reaction rate constants, k_1, k_2, k_3 and power orders α, β, γ of PFA concentration for three oxidation reactions pathways: alcohol to ester, alcohol to ketone and ketone to ester were obtained, respectively. These findings might provide a new insight into the extraction of oligosaccharides.

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