نتایج جستجو برای: 4 caffeoy1 quinic acid

تعداد نتایج: 1924359  

Journal: :Organic & biomolecular chemistry 2012
David J Burns Shuji Hachisu Peter O'Brien Richard J K Taylor

Due to the lack of availability of unnatural (+)-quinic acid as a starting material, a 6-step synthesis of butane diacetal-protected (4S,5S)-dihydroxycyclohexen-1-one (formally derived from (+)-quinic acid) has been devised. The key catalytic asymmetric step involves a chiral Co-salen-catalysed epoxide ring-opening reaction. (4S,5S)-Dihydroxycyclohexen-1-one was utilised in the synthesis of two...

2015
Mariusz Tadych Nicholi Vorsa Yifei Wang Marshall S. Bergen Jennifer Johnson-Cicalese James J. Polashock James F. White

Cranberry fruit are a rich source of bioactive compounds that may function as constitutive or inducible barriers against rot-inducing fungi. The content and composition of these compounds change as the season progresses. Several necrotrophic fungi cause cranberry fruit rot disease complex. These fungi remain mostly asymptomatic until the fruit begins to mature in late August. Temporal fluctuati...

Journal: :The Biochemical journal 1953
A C HULME

Chlorogenic acid, the depside formed by the condensation of caffeic and quinic acids, was first obtained in crystalline form by Gorter (1909) from green coffee beans, although considerably earlier Ludwig & Kromeyer (1854) had noted the presence in the seeds of the sunflower of a compound which was undoubtedly chlorogenic acid. The acid was first thought to be a glycoside of caffeic acid, but Go...

Journal: :Molecules 2016
Ling-Na Wang Wei Wang Masao Hattori Mohsen Daneshtalab Chao-Mei Ma

Chlorogenic acid is a well known natural product with important bioactivities. It contains an ester bond formed between the COOH of caffeic acid and the 3-OH of quinic acid. We synthesized a chlorogenic acid analogue, 3α-caffeoylquinic acid amide, using caffeic and quinic acids as starting materials. The caffeoylquinc acid amide was found to be much more stable than chlorogenic acid and showed ...

2008
Ronald W. Pero Harald Lund Tomas Leanderson

For over 50 years, hippuric/quinic acids were believed to have no biological efficacy. Here data are presented to support the hypothesis that quinic acid is not responsible for any efficacy, but rather that quinic acid nutritionally supports the synthesis of tryptophan and nicotinamide in the gastrointestinal (GI) tract, and that this in turn leads to DNA repair enhancement and NF-kB inhibition...

Journal: :Angewandte Chemie 2015
Francis Belanger Charles E Chase Atsushi Endo Francis G Fang Jing Li Steven R Mathieu Annie Z Wilcoxen Huiming Zhang

Crystallization-induced diastereoselective transformation (CIDT) of an α-methyl nitrile completes an entirely non-chromatographic synthesis of the halichondrin B C14-C26 stereochemical array. The requisite α-methyl nitrile substrate is derived from D-quinic acid through a series of substrate-controlled stereoselective reactions via a number of crystalline intermediates that benefit from a rigid...

Journal: :Bioinformation 2007
David A Logan Allison L Koch Wubei Dong James Griffith Roger Nilsen Mary E Case Heinz-Bernd Schüttler Jonathan Arnold

The products of five structural genes and two regulatory genes of the qa gene cluster of Neurospora crassa control the metabolism of quinic acid (QA) as a carbon source. A detailed genetic network model of this metabolic process has been reported. This investigation is designed to expand the current model of the QA reaction network. The ensemble method of network identification was used to mode...

2017
Anna C. Crecelius Beate Michalzik Karin Potthast Stefanie Meyer Ulrich S. Schubert

Mass spectrometric imaging (MSI) has received considerable attention in recent years, since it allows the molecular mapping of various compound classes, such as proteins, peptides, glycans, secondary metabolites, lipids, and drugs in animal, human, or plant tissue sections. In the present study, the application of laser-based MSI analysis of secondary plant metabolites to monitor their transpor...

Journal: :Proceedings of the National Academy of Sciences 1950

Journal: :Bitlis Eren üniversitesi fen bilimleri dergisi 2022

Recently, agents with natural antioxidant and antimicrobial properties have been popularly studied. For this purpose, phenolic compounds, terpenes, organic acids are examined in their properties. Of these, increasingly being used pharmacology, medicine, food, industry. Quinic acid is a compound found many edible fruits plants. In study, the effect of quinic acid, which has structure cyclohexane...

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