Domino Reaction for the Construction
of New 2-Oxo[1,2,4]triazolo[5,1-<i>c</i>][1,4]thiazines
作者:Fabio Mantellini、Francisco Palacios、Orazio Attanasi、Samuele Lillini、Jesús de los Santos、Roberto Ignacio
DOI:10.1055/s-0028-1087928
日期:——
The synthesis of highly functionalized α-thiohydrazones by Michael addition of 3-mercapto-2-ketones to 1,2-diazabuta-1,3-dienes is described. The phosphorylated α-thiohydrazones were hydrolyzed into β-ketophosphine oxides or phosphonates containing a mercapto ketone in the a position, while the α-thiohydrazones with a carboxylate group were subsequently transformed into 2-oxo-2,3,8,8a-tetrahydro-1H-[1
[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