辛醛VC缩醛的合成及其在茶籽油中的抗氧化性能  

Synthesis of ascorbyl octyl aldehyde acetals and their antioxidation activity in tea seed oil

作　　者：郑大贵[1] 余衍文[2] 朱华龙[1] 叶红德[1] 

机构地区：[1]上饶师范学院江西省普通高校应用有机化学重点实验室,江西上饶334001 [2]南昌大学化学系,江西南昌330031

出　　处：《化学研究与应用》2008年第3期356-359,共4页Chemical Research and Application

基　　金：江西省普通高校重点实验室科技计划项目(赣教技字[2006]302号)资助

摘　　要：Ascorbyl octyl aldehyde acetals are prepared from the reaction of ascorbic acid with octyl aldehyde using p-toluene sulfonic acid as catalyst,dimethyl acetamide as solvent,cyclohexane as dehydration agent. The acetals are obtained as a mixt. of two diastereomers(ratio,0.46∶0.54) based on the results of 1H-NMR spectroscopic analysis. The antioxidation activity of ascorbyl octyl aldehyde acetals in fresh tea seed oil is evaluated by peroxide value(POV) determination. The POV data show that ascorbyl octyl aldehyde acetals exhibits signifcant dose-effect relationship. The antioxidation activity of ascorbyl octyl aldehyde acetals is stronger than that of VC or PG but weaker than that of TBHQ,when their amount in fresh tea seed oil is respectively added according to the maximum allowed concentration as food additives in China.Ascorbyl octyl aldehyde acetals are prepared from the reaction of ascorbic acid with octyl aldehyde using p-toluene sulfonic acid as catalyst,dimethyl acetamide as solvent, cyclohexane as dehydration agent. The acetals are obtained as a mixt. of two diastereomers （ratio,0. 46： 0. 54） based on the results of ^1H-NMR spectroscopic analysis. The antioxidation activity of ascorbyl octyl aldehyde acetals in fresh tea seed oil is evaluated by peroxide value（POV） determination. The POV data show that ascorbyl octyl aldehyde acetals exhibits signifcant dose-effect relationship. The antioxidation activity of ascorbyl octyl aldehyde acetals is stronger than that of VC or PG but weaker than that of TBHQ, when their amount in fresh tea seed oil is respectively added according to the maximum allowed concentration as food additives in China.

关 键 词：辛醛 VC 辛醛VC缩醛 过氧化值(POV) 

分 类 号：O621.256.4[理学—有机化学]