Isoquercitrin Esters with Mono- or Dicarboxylic Acids: Enzymatic Preparation and Properties
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Isoquercitrin Esters with Mono- or Dicarboxylic Acids: Enzymatic Preparation and Properties
A series of isoquercitrin (quercetin-3-O-β-d-glucopyranoside) esters with mono- or dicarboxylic acids was designed to modulate hydro- and lipophilicity and biological properties. Esterification of isoquercitrin was accomplished by direct chemoenzymatic reaction using Novozym 435 (lipase from Candida antarctica), which accepted C₅- to C12-dicarboxylic acids; the shorter ones, such as oxalic (C₂)...
متن کاملSynthesis and Antiradical Activity of Isoquercitrin Esters with Aromatic Acids and Their Homologues
Isoquercitrin, (IQ, quercetin-3-O-β-d-glucopyranoside) is known for strong chemoprotectant activities. Acylation of flavonoid glucosides with carboxylic acids containing an aromatic ring brings entirely new properties to these compounds. Here, we describe the chemical and enzymatic synthesis of a series of IQ derivatives at the C-6″. IQ benzoate, phenylacetate, phenylpropanoate and cinnamate we...
متن کاملCharacterization of Esters of fatty Acids and Dicarboxylic Acids with Guerbet Alcohols
Esters oi some common iatty acids and diacids with Guerbet alcohols were prepared by p-toluenesulionic acidcat~lyzed esteriiication. Such materials are oi interest in applications such as additives in various industrial products. Gas chromatography-mass spectrometry with chemical ionization using methane as ionization gas is an efficient characterization method ior these Guerbet esters and dies...
متن کاملCombination of ester biosynthesis and ω-oxidation for production of mono-ethyl dicarboxylic acids and di-ethyl esters in a whole-cell biocatalytic setup with Escherichia coli
BACKGROUND Medium chain length (C6-C12) α,ω-dicarboxylic acids (DCAs) and corresponding esters are important building blocks for the polymer industry. For DCAs of 12 carbon atoms and longer, a sustainable process based on monooxygenase catalyzed ω-oxidation of fatty-acids has been realized. For medium-chain DCAs with a shorter chain length however, such a process has not been developed yet, sin...
متن کاملNucleation of dicarboxylic acids
Homogeneous vs. heterogeneous nucleation in water-dicarboxylic acid systems A. I. Hienola, H. Vehkamäki, I. Riipinen, and M. Kulmala Department of Physics, Division of Atmospheric Sciences and Geophysics, University of Helsinki, P.O. Box 64, 00014 University of Helsinki, Finland Received: 28 March 2008 – Accepted: 2 September 2008 – Published: 21 October 2008 Correspondence to: A. I. Hienola (a...
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ژورنال
عنوان ژورنال: International Journal of Molecular Sciences
سال: 2016
ISSN: 1422-0067
DOI: 10.3390/ijms17060899