Formation, Characterization, and Occurrence of β-Carboline Alkaloids Derived from α-Dicarbonyl Compounds and <scp>l</scp>-Tryptophan
作者:Tomás Herraiz、Adriana Peña、Haroll Mateo、Marta Herraiz、Antonio Salgado
DOI:10.1021/acs.jafc.2c03187
日期:2022.7.27
occurring bioactive alkaloids, whereas α-dicarbonyl compounds are reactive substances generated in foods and in vivo. In this work, l-tryptophan reacted with α-dicarbonyl compounds affording new β-carbolines. Glyoxal afforded 1-hydroxymethyl-β-carboline (HME-βC) and its 3-carboxylic acid, and methylglyoxal afforded 1-(1-hydroxyethyl)-β-carboline (HET-βC) and its 3-carboxylic acid. 3-Deoxyglucosone afforded
β-咔啉 (βCs) 是天然存在的生物活性生物碱,而 α-二羰基化合物是食物和体内产生的活性物质。在这项工作中,l-色氨酸与 α-二羰基化合物反应生成新的 β-咔啉。乙二醛提供 1-羟甲基-β-咔啉 (HME-βC) 及其 3-羧酸,甲基乙二醛提供 1-(1-羟乙基)-β-咔啉 (HET-βC) 及其 3-羧酸。3-脱氧葡萄糖酮提供 1-(1,3,4,5-四羟基戊-1-基)-β-咔啉异构体 ( 1a/b ), 1-(1,4,5-三羟基戊-1-基)-β-咔啉 ( 2 ) 和 1-(1,5-dihydroxypent-3-en-1-yl)-β-咔啉 ( 3)。这些βCs的形成在酸性条件下和随着温度的升高而增加。提出了一种机制来解释基于互变异构和环化为二氢-βC-3-COOH 中间体将羰基转化为羟基的机制,将其分离并得到βC。这些α-二羰基衍生的βCs发生在l的模型反应中-色氨酸与果糖或葡萄糖在加热下孵育,可被视为晚期糖基化终产物