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13 results for “esterification”
Transition metal-free approach for late-stage benzylic C(sp3)–H etherifications and esterifications
<p><strong>Description of the dataset: </strong></p> <p><strong>Origin of the data: </strong>Experimental spectroscopic measurements<br> <strong>Data Type: </strong>experimental measurements, open access supporting information<br> </p> <p>The data are in CSV, XLSX and FBSW. Supporting information are supplied in PDF format.</p> <p>Data <strong>generated </strong>by instruments: </p> <p>Varian Cary 5000 UV-Vis-NIR spectrophotometer for UV-Vis measurements,<br> Varian Cary Eclipse fluorescence spectrophotomer for fluorescence quenching measurements.</p> <p><strong>Analytical and procedural information: </strong>Stern-Volmer fluorescence quenching experiments and UV-Vis measurements.</p> <p><strong>Definition of variables: </strong>Wavelength, Absorbance, Concentration<br> <strong>Units of measurement: </strong>nanometers (nm), moles-per-litre (mol/l)</p> <p><strong>Abbreviations: </strong><br> File names and data headers use the following abbreviations:</p> <ul> <li><strong>SVQuench </strong>refers to Stern-Volmer quenching experiments</li> <li><strong>MesAcrMe xx </strong>refers to data related to the catalyst 9-mesityl-10-methylacridinium. <strong>Xx </strong>is the amount of catalyst in mol/l (10-4 should be intended as 0.1 mmol/l and so on).</li> <li><strong>EtAn xx </strong>refer to measurements related to 8-ethylanisol. <strong>Xx </strong>is the amount of quencher in mol/l as above.</li> <li><strong>BenzAc xx </strong>refer to measurements related to benzoic acid. <strong>Xx </strong>is the amount of quencher in mol/l as above.</li> <li><strong>Pyrz xx </strong>refer to measurements related to pyrazole. <strong>Xx </strong>is the amount of quencher in mol/l as above.</li> </ul>
Figure 2 in Toxicity and larvicidal activity on Aedes aegypti of citronella essential oil submitted to enzymatic esterification
Figure 2. Mortality percentage of Artemia salina nauplii in relation to increased sample concentration.
Figure 1 in Toxicity and larvicidal activity on Aedes aegypti of citronella essential oil submitted to enzymatic esterification
Figure 1. Kinetics of citronellyl and geranyl cinnamates production (molar ratio alcohol/acid 3:1, enzyme 15 wt%, temperature 70°C, 150 rpm).
The central role of oxo clusters in zirconium-based esterification catalysis
<p>Data of the figures in the publication "<strong>The central role of oxo clusters in zirconium-based esterification catalysis</strong>".<br>DOI: <a href="https://doi.org/10.1002/smsc.202400369">https://doi.org/10.1002/smsc.202400369</a></p> <p>The <em>.pxp</em> documents contain the experimental data of the figures in the manuscript and SI and they can be opened/edited with the software IGOR Pro 6.3 or higher.</p> <p> </p> <p><strong>Figure 1:</strong> Structural representation of catalysts used in this article. A) Nanocrystal (ZrO2 ), B) Metal-organic framework (UiO-66), (C) Zr6 oxo cluster (Zr6-acetate) and D) Zr12 oxo cluster (Zr12-acetate)</p> <p><strong>Figure 2:</strong> Catalytic esterification of oleic acid with ethanol in ortho-dichlorobenzene (o-DCB). The catalyst is either Zr12-oleate, ZrO2 nanocrystals or the MOF UiO-66. The reactions were performed in triplicate.</p> <p><strong>Figure 3:</strong> Catalytic esterification, comparing Zr12 oxo clusters and UiO-66, for different carboxylic acid substrates. The conditions are identical to Figure 1: 120 °C, 12 mol% zirconium, 0.2 M carboxylic acid, molecular sieves, and four equivalents of ethanol.</p> <p><strong>Figure 4:</strong> Catalytic esterification of oleic acid with hexanol. The reaction is either done in mesitylene (using four equivalents hexanol), without mesitylene (using four equivalents hexanol), or without mesitylene and a reduced 1.2 equivalents of hexanol. In the latter case, we recovered the catalyst and used this for a second catalytic reaction. The dotted line corresponds to the maximum yield that can be obtained when excluding the oleate ligands on the catalyst surface.</p> <p><strong>Figure 5: </strong>PDF refinement for A) Zr12-oleate cluster before catalysis, and after the first and second round of catalysis, B) and for catalyst recovered after 30 min with and without molecular sieves using Zr(OR)4 as the catalyst. The values in square brackets correspond to the ratio of monomer to dimer-cluster in the fit. The refinement is performed using both Zr6- and Zr12-propionate structures obtained from the single crystal structure (CCDC 604529).</p> <p><strong>Figure S1 - S24:</strong> Figures from Supporting Information.</p>
Research Data for the Journal Article: Metal-free catalytic systems based on imidazolium chloride and strong bases for selective oxidative esterification of furfural to methyl furoate
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GC-MS data corresponding to: Methanol-Based Esterification of Palm Oil Sludge – Preparation of Fatty Acids (Palmitic and Oleic) Ethyl Esters via Ethyl Acetate Transesterification by Javier Chaparro-Acosta and Juan-Manuel Urbina-González
<p>GC-MS data corresponding to:</p> <p>Methanol-Based Esterification of Palm Oil Sludge – Preparation of Fatty Acids (Palmitic and Oleic) Ethyl Esters via Ethyl Acetate Transesterification<br> by<br> Javier Chaparro-Acosta<sup>(1)</sup> and Juan-Manuel Urbina-González<sup>(2*)</sup></p> <p><sup>1</sup>Escuela de Ingeniería Química, Universidad Industrial de Santander, Bucaramanga, 680002, Colombia<br> <sup>2</sup>Escuela de Química, Universidad Industrial de Santander, Bucaramanga, 680002, Colombia<br> * Correspondence: jurbina@uis.edu.co<br> <br> <strong>Abstract</strong><br> Acid catalyzed Fischer esterification of fatty acids using methanol (as reagent and solvent) allow the preparation of long chain alkyl methyl esters. Transesterification of palm oil in basic media using methanol is also a known path to monoalkyl methyl ethers derived of fatty acids. In this work we report the Fischer esterification using methanol of a sample of local palm oil sludge (a fraction rich in fatty acids) and how during the extraction with ethyl acetate a transesterification reaction occurred, allowing the preparation of ethyl esters of oleic and palmitic acids as main compounds.</p> <p> </p>
Supplementary Information for "Biased Borate Esterification during Nucleoside Phosphorylase-Catalyzed Reactions: Apparent Equilibrium Shifts and Kinetic Implications"
<p>This is the external Supplementary Information for our publication "Biased Borate Esterification during Nucleoside Phosphorylase-Catalyzed Reactions: Apparent Equilibrium Shifts and Kinetic Implications".</p> <p>The .zip files contains the raw data and metadata for all items (supplementary and main text) as well as the calculation results. This includes UV, HPLC, NMR, DFT and MD results. This revised version presents extended DFT results (now including dispersion contributions) as well as additional NMR data (now including analytical data for isolated 1f, among other data).</p> <p>To some extent, this work builds on and borrows from our previous publications on spectral unmixing (https://doi.org/10.3390/mps2030060, https://doi.org/10.1002/cbic.202000204), continuous reaction monitoring (https://doi.org/10.1021/acs.analchem.1c05356), and thermodynamic reaction control (https://doi.org/10.1002/adsc.201901230, https://doi.org/10.5281/zenodo.3568858, https://doi.org/10.1002/cphc.202000901, https://doi.org/10.1021/acscatal.1c02589).</p>
Fig. 2 in The esterification of xanthophylls in Solanum lycopersicum (tomato) chromoplasts; the role of a non-specific acyltransferase
Fig. 2. Example chromatograms showing the effect of the pyp mutation on azygous and ketocarotenoid fruit. 1) Astaxanthin, 2) Lutein, 3) Phoenicoxanthin, 4) Canthaxanthin, 5) 3′OH Echinenone, 6) 3OH Echinenone, 7) Echinenone, 8 and 8′) Lycopene, 9) Esterified carotenoid, 10) γ-Carotene, 11) Esterified carotenoid, 12) β-Carotene.
Fig. 1 in The esterification of xanthophylls in Solanum lycopersicum (tomato) chromoplasts; the role of a non-specific acyltransferase
Fig. 1. Workflow for the generation, screening and phenotypic observations of the four genotypes created. Blue circles indicate number of genotypes detected from the total pool used.
Fig. 3 in The esterification of xanthophylls in Solanum lycopersicum (tomato) chromoplasts; the role of a non-specific acyltransferase
Fig. 3. Biosynthetic pathway of ketocarotenoids and ketocarotenoid esters. CRTZ and CRTW are the bacterial carotenoid hydroxylase and oxygenase enzymes respectively. The PYP gene facilitates the esterification with fatty acids to generate ketocarotenoid esters. Phoenicoxanthin and astaxanthin accumulate within the genotypes assessed and esterified forms of these have been observed in this work.
smiles_esterification
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IL-27 increases energy storage in white adipocytes by enhancing glucose uptake and fatty acid esterification
<p>Data set associated with a submitted paper.</p>
Raw Data of Sequential Esterification – Diels Alder Reactions for Improving Pine Rosin Durability within Road Marking Paint
<p>Raw data and figures for Sequential Esterification – Diels Alder Reactions for Improving Pine Rosin Durability within Road Marking Paint</p>
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