Nonvolatile Oxidation Products of Glucose in Maillard Model Systems: Formation of Saccharinic and Aldonic Acids and Their Corresponding Lactones
作者:Luke J. W. Haffenden、Varoujan A. Yaylayan
DOI:10.1021/jf073290c
日期:2008.3.1
aldehydic groups into carboxylic acids, oxidative cleavage of alpha-dicarbonyl moieties into aldonic acids, and benzylic acid rearrangement of 1-deoxy-glucosone into saccharinic acids. The aldonic and saccharinic acids were identified through silylation of their lactone derivatives, and their origin was verified through (13)C-labeling studies. The following lactones were identified in glucose and glucose/glycine
通过使用基于热解-气相色谱-质谱的方法,通过使用三甲基甲硅烷基二乙胺的后热解原位衍生技术研究了同位素标记的葡萄糖/甘氨酸模型系统的非挥发性氧化产物。数据分析表明,已知的反应性糖中间体(如葡糖酮及其脱氧衍生物)可以在Maillard模型系统中经历三种类型的转化:醛基氧化为羧酸,α-二羰基部分氧化裂解为醛酸和1-脱氧葡糖酮的苄酸重排成糖精酸。醛糖酸和糖精酸是通过对其内酯衍生物进行甲硅烷基化来鉴定的,其来源已通过(13)C标记研究得到了验证。在葡萄糖和葡萄糖/甘氨酸模型系统中鉴定出以下内酯:反式-二氢-3,4-双[(三甲基甲硅烷基)氧基] -2(3 H)-呋喃酮,顺式-二氢-3,4-双[(三甲基甲硅烷基) 〔氧基〕-2(3H)-呋喃酮,2-C-甲基-2,3,5-tris-O-(三甲基甲硅烷基)-D-核糖酸γ-内酯,3-deoxy-2,5,6-tris -O-(三甲基甲硅烷基)-D-核己酸γ-内酯,2-脱氧-3