S_2O_8^(2-)/TiO_2或SO_4^(2-)/TiO_2固体超强酸催化甲氧基杨梅苷水解脱苷研究  

Catalytic hydrolysis of methoxy myricetin by applying solid super acids S_2O_8^(2-)/TiO_2 or SO_4^(2-)/TiO_2

作　　者：姚元勇[1] 唐帮成[1] 陈仕学[1] 邢明明[1] 吴思展[1] 舒华[1] 

机构地区：[1]铜仁学院材料与化学工程学院,铜仁554300

出　　处：《食品科技》2015年第7期281-285,共5页Food Science and Technology

基　　金：贵州省教育厅"十二五"重大科技专项([2012]018);贵州省教育厅自然科学基金项目(KY字[2012]069)

摘　　要：以天然黄酮类化合物杨梅苷为原料,通过羟甲基化作用,合成甲氧基杨梅苷中间体。然后,在S2O82-/TiO2或SO42-/TiO2固体酸催化水解脱苷作用下,获得具有潜在生物活性黄酮类衍生物前体甲氧基杨梅素。探讨了在90%的乙醇作溶剂、室温搅拌10 h的条件下,不同焙烧温度自制的S2O82-/TiO2或SO42-/TiO2固体酸所表现不同强度的Bronsted酸性和Lewis酸性对甲氧基杨梅苷2水解脱苷率的影响,并对再生的固体超强酸的催化水解活性进行分析。实验得出,此方法在生产工艺中试阶段具有较强的实践意义。The intermediate of methoxy myricetin was afforded through methyiation for natural fiavonoid of myricetin,which was underwent catalytic hydrolysis in the presence of solid super acids S2O8^2-/TiO_2 and SO4^2-/TiO2,respectively,to afford potentially bioactive precursor of fiavonoid derivatives 3-hydroxy-5,7-dimethoxy-2-（3,4,5-trimethoxyphenyl）-4H-chromen-4-one.Simultaneously,under the conditions of 90% ethanol as solvent,stirring for about 10 h and room temperature,it investigated that the effect on yields of hydrolysis of methoxy myricetin 2 was made by solid super acids S2O8^2-/TiO2 and SO4^2-/TiO2 performing varied acidities of Bronsted acid and Lewis acid,which were prepared from varied roasting temperatures.Furthermore,it＇s debating on catalytic activity of reusing solid super acidsS2O8^2-/TiO2 and SO4^2-/TiO2 in hydrolysis of methoxy myricetin.

关 键 词：固体超强酸 催化水解 黄酮类化合物 杨梅苷 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]