Characterization of 2-Methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine from Thermal Degradation of Thiamin
摘要:
Thiamin hydrochloride was thermally degraded in phosphate buffer (pH 6.5) at 110 degreesC for 2 h. A major decomposition product was isolated by column chromatography and structurally identified by spectrometric techniques ((1)H NMR, (13)C NMR, 2D NMR, and MS) as 2-methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine (MAMP). The possible formation pathway of MAMP was studied using two model systems. It is proposed that MAMP is formed by nucleophilic attack of 2-methyl-3-furanthiol on the thiamin.
[EN] SAVOURY AND MOUTHFULNESS TASTE ENHANCERS<br/>[FR] EXHAUSTEURS DE SAVEUR ET DE CONSISTANCE DE GOÛT
申请人:LUCTA S A
公开号:WO2020074561A1
公开(公告)日:2020-04-16
The present invention relates to a compound of formula (I1); to a mixture comprising an amount from 86% to 99% by weight measured by quantitative proton-NMR of a compound of formula (IA), (IB), (IC), (ID), (IE), (IF), (IG), (IH) and (IJ); and an edible composition and an edible article comprising them. The invention also relates to processes for their preparation and their use as a savoury and mouthfulness taste enhancer; particularly kokumi and/or umami taste enhancer. Formulae (I') (IA), (IB), (IC), (ID), (IE), (IF), (IG), (IH), (IJ).
demonstrated thiamine as the only precursor and an intermolecular formation pathway for the compounds (S)-(((4-amino-2-methylpyrimidin-5-yl)methyl)thio)-5-hydroxypentan-2-one and 2-methyl-5-(((2-methylfuran-3-yl)thio)methyl)pyrimidin-4-amine. On the basis of the knowledge that several thiamine derivatives showed taste-modulating activity, selected thiamine-based binary model reactions and synthesis
Characterization of 2-Methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine from Thermal Degradation of Thiamin
作者:Jin-Woo Jhoo、Ming-Chi Lin、Shengmin Sang、Xiaofang Cheng、Nanqun Zhu、Ruth E. Stark、Chi-Tang Ho
DOI:10.1021/jf011591v
日期:2002.7.1
Thiamin hydrochloride was thermally degraded in phosphate buffer (pH 6.5) at 110 degreesC for 2 h. A major decomposition product was isolated by column chromatography and structurally identified by spectrometric techniques ((1)H NMR, (13)C NMR, 2D NMR, and MS) as 2-methyl-4-amino-5-(2-methyl-3-furylthiomethyl)pyrimidine (MAMP). The possible formation pathway of MAMP was studied using two model systems. It is proposed that MAMP is formed by nucleophilic attack of 2-methyl-3-furanthiol on the thiamin.