Tag: M.W=50-100

Hong, Yubiao published the artcileChiral-at-Iron Catalyst: Expanding the Chemical Space for Asymmetric Earth-Abundant Metal Catalysis, Related Products of alcohols-buliding-blocks, the main research area is chiral iron catalyst chem space asym earth abundant metal; enantioselective Cannizzaro reaction; asym Nazarov cyclization.

A new class of chiral iron catalysts is introduced that contains exclusively achiral ligands with the overall chirality being the result of a stereogenic iron center. Specifically, iron(II) is cis-coordinated to two N-(2-pyridyl)-substituted N-heterocyclic carbene (PyNHC) ligands in a bidentate fashion in addition to two monodentate acetonitriles, and the dicationic complex is complemented by two hexafluorophosphate ions. Depending on the helical twist of the PyNHC ligands, the metal center adopts either a Λ or Δ absolute configuration. Importantly, the two PyNHC ligands are constitutionally and configurationally inert, while the two acetonitriles are labile and allow asym. transition metal catalysis. This is demonstrated with an enantioselective Cannizzaro reaction (96% yield, 88% ee) and an asym. Nazarov cyclization (89% yield, >20:1 dr, 83% ee).

Journal of the American Chemical Society published new progress about Bond angle. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hoffmann, Jessica Fernanda published the artcileVolatile compounds profile of Brazilian aromatic brown rice genotypes and its cooking quality characteristics, Related Products of alcohols-buliding-blocks, the main research area is volatile compound brown rice cooking.

Background and objectives : This study evaluated the volatile profile by solid-phase microextraction (SPME)-gas chromatog./mass spectrometry (GC/MS) and the cooking quality properties of seven aromatic and one non-aromatic rice genotypes grown in Brazil. Findings : Twenty-three volatile compounds were identified by SPME-GC/MS anal. PCA and PLS-DA allowed the separation of aromatic and non-aromatic genotypes. PLS-DA anal. revealed six compounds as discriminating between groups: 2-acetyl-1-pyrroline (2-AP), decanal, 2-hexanone, 2-pentylfuran, 1-hexanol, and hexanal. 2-AP was detected only in aromatic genotypes, and the content varied from 0.21 to 0.57 μg/g. Cooking time changed from 23.5 to 38.3 min in the new aromatic genotypes while hardness changed from 52.7 to 100.7 N. Conclusions : Our study revealed six volatile compounds as discriminants between aromatic and non-aromatic genotypes grown in Brazil. 2-AP was identified only in aromatic genotypes. Genotype BR5 exhibited the best general performance since their volatile compounds results indicate less off-flavors (hexanal), higher 2-AP content, and similar cooking time and hardness to IRG and JAS. Significance and novelty : Results may help rice chain in selecting Brazilian genotypes of aromatic rice to be grown in Brazil and distributed worldwide. Also, this work may serve as a starting point for future work on aromatic rice authenticity.

Cereal Chemistry published new progress about Brown rice. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Siewert, Riko published the artcileNon-covalent interactions in molecular systems: thermodynamic evaluation of the hydrogen bond strength in aminoalcohols, HPLC of Formula: 584-02-1, the main research area is aminoalc hydrogen bond stabilization energy formation enthalpy.

In mols. with two functional groups that form hydrogen bonds, the structure-property relationship can depend significantly on the strength of intra-mol. hydrogen bonding. This bonding can cause a substantial conformational change that is accompanied by a frequency shift in the IR spectrum, which provides the basis for exptl. studies. Despite its great importance in biol. systems, the available literature data for the strength of this bonding are scarce and not in agreement. In this work, we present the results of four thermodn. methods for the determination of the strength of intramol. hydrogen bonds. Comprehensive thermochem. anal. of 1-amino-2-alcs. and 2-amino-1-alcs. was performed with Fourier-transform IR spectroscopy, high-level G4 quantum-chem. calculations, the homomorph scheme with enthalpies of vaporization and a group contribution method. With the combination of these four thermodn. methods, the strength of intramol. hydrogen bonding in 1,2-aminoalcs. and 2,1-aminoalcs. was evaluated quant. The results were correlated with NBO parameters to find an explanation for the different strengths of intramol. hydrogen bonds in total charge transfer and second order stabilization energies.

Physical Chemistry Chemical Physics published new progress about Conformers. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, HPLC of Formula: 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Reade, Sophie published the artcilePotential role of fecal volatile organic compounds as biomarkers of chemically induced intestinal inflammation in mice, COA of Formula: C5H12O, the main research area is acute chronic colitis intestinal inflammation feces VOC biomarker; VOCs; colitis; inflammatory bowel disease.

Metabolomics studies have the potential to discover biomarkers. Fecal volatile organic compounds (VOCs) have been found to differ in patients with inflammatory bowel disease and irritable bowel syndrome. Murine models of colitis offer an alternative to human studies in which diet can be controlled. We aimed to investigate fecal VOCs from mice in which acute and chronic colitis was induced. Groups of adult C57BL/6 mice underwent treatment with oral dextran sulfate sodium to induce colitis. Control mice received no treatment or had acute osmotic diarrhea induced with magnesium sulfate. Colitis was assessed clin. and by histol. Samples of feces and/or colon contents were collected and volatile compounds determined by solid phase microextraction-GC-MS. Statistics were performed using metabolomics tools. Acute colitis was associated with an increase in aldehydes and chronic colitis with one specific ketone. Osmotic diarrhea was associated with a significant reduction in VOCs, especially alcs. We provide evidence that the identification of disease-associated VOC concentration ranges, combined with specific marker compounds, would potentially increase the likelihood of finding an inflammatory bowel disease-specific fecal VOC marker profile.

FASEB Journal published new progress about Biomarkers. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, COA of Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Cai, Cheng published the artcileComparison of Two Acid Hydrotropes for Sustainable Fractionation of Birch Wood, Safety of 3-Pentanol, the main research area is acid hydrotrope sustainable birch wood; acid recovery; cellulose nanofibrils; esterification; lignin; maleic acid.

This study reports on a comparative study of acid hydrotropic fractionation (AHF) of birch wood using maleic acid (MA) and p-toluenesulfonic acid (p-TsOH). Under the same level of delignification, lignin dissolved by MA is much less condensed with a higher content of ether aryl β-O-4 linkages. Lignin depolymerization dominated in MA hydrotropic fractionation (MAHF) and resulted in a single lower mol. weight peak, in contrast to the competitive depolymerization and repolymn. in p-TsOH AHF with a bimodal distribution. The less condensed MA-dissolved lignin facilitated catalytic conversion to monophenols. Carboxylation of residual lignin in fractionated cellulosic water-insoluble solids (WISs) enhanced enzymic saccharification by decreasing nonproductive cellulase binding to lignin. At a low cellulase loading of 10 FPU g-1 glucan, saccharification of WIS-MT120 from MAHF at 120°C was 95% compared with 48% for WIS-PT85 from p-TsOH AHF at 85°C under the same level of delignification of 63%. Residual lignin carboxylation also facilitated nanofibrillation of WIS for producing lignin-containing cellulose nanofibrils (LCNFs) through an enhanced lignin lubrication effect, which substantially decreases fibrillation energy. LCNFs from only one pass of microfluidization of WIS-MT120 have the same morphol. as those from WIS-PT85 after three passes. MA also has a lower solubility and higher minimal hydrotropic concentration, which facilitated acid recovery. MA is U. S. Food and Drug Administration (FDA)-approved as an indirect food additive, affording significant advantages compared with p-TsOH for biorefinery applications.

ChemSusChem published new progress about Birch wood. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Safety of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lu, Zeye published the artcileHighly efficient NHC-iridium-catalyzed β-methylation of alcohols with methanol at low catalyst loadings, Formula: C5H12O, the main research area is alc methanol iridium catalyst alkylation regioselective; alkyl alc preparation.

A highly efficient β-methylation of primary and secondary alcs. with methanol was achieved by using bis-N-heterocyclic carbene iridium (bis-NHC-Ir) complexes. Broad substrate scope and up to quant. yields were achieved at low catalyst loadings with only hydrogen and water as byproducts. The protocol was readily extended to the β-alkylation of alcs. with several primary alcs. Control experiments, along with DFT calculations and crystallog. studies, revealed that the ligand effect was critical to their excellent catalytic performance, shedded light on more challenging Guerbet reactions with simple alcs.

Science China: Chemistry published new progress about Alkylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Dambatta, Mubarak B. published the artcileTransition metal free α-C-alkylation of ketones using secondary alcohols, Application In Synthesis of 584-02-1, the main research area is aryl ketone preparation; ketone secondary alc alkylation.

A base-mediated α-C-alkylation of aryl Me ketones with secondary alcs. was developed for the synthesis of aryl ketones ArC(O)CH2CH(R1)(R2) [R1 = Me, Et; R2 = Me, Et, Ph, etc.; R1R2 = (CH2)4, (CH2)5, (CH2)6, etc.; Ar = 2,4,6-(Me)3C6H2, 2,3,5,6-(Me)4C6H, 2,3,4,5,6-pentamethylphenyl, etc.]. This transition metal free approach employed KOt-Bu as the base and exhibited a broad scope, allowing a range of commodity aliphatic secondary alcs. Aryl Me ketones underwent selective mono-α-C-alkylation in high isolated yields (23 examples, 65% average yield).

Tetrahedron published new progress about Alkylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application In Synthesis of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, X. published the artcileIsolation and characterization of endophytic bacteria for controlling root rot disease of Chinese jujube, Application In Synthesis of 584-02-1, the main research area is Ziziphus Fusarium endophytic bacteria root rot disease; Brevibacterium halotolerans ; Fusarium oxysporum ; Chinese jujube; biological control; endophytic bacteria; root rot disease.

Fusarium oxysporum is the primary pathogen causing root rot disease that severely affects cultivation of jujube fruit in the Xinjiang province of China. The aim of this study was to identify endophytic bacteria in healthy jujube organs that could effectively suppress F. oxysporum growth. Different plant organs (leaves, twigs and roots) were collected from healthy Chinese jujube cultivated in southern Xinjiang province of China. The endophytic bacterium Brevibacterium halotolerans JZ7 was selected for its strong antagonistic activity and growth-promoting characteristics. Gas-chromatog. mass-spectrometry anal. showed that acetoin, 2,3-butanediol and fenretinide were the three dominant volatile organic compounds produced by strain JZ7. Fenretinide strongly suppressed spore germination of F. oxysporum in vitro. Pot experiments showed that strain JZ7 colonized both the roots and rhizosphere soil of Chinese jujube and significantly reduced F. oxysporum level in jujube rhizosphere soil. We demonstrated that B. halotolerans JZ7 can be developed into a biol. control agent to combat root rot disease of Chinese jujube in the Xinjiang province of China. Significance and Impact of the Study : The suggested strategy for biol. control of jujube root rot disease is fully in accordance with the current principles of sustainability.

Journal of Applied Microbiology published new progress about Alternaria. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application In Synthesis of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mangoufis-Giasin, Iosif published the artcileDifferent promoting roles of ruthenium for the oxidation of primary and secondary alcohols on PtRu electrocatalysts, Safety of 3-Pentanol, the main research area is oxidation catalsyt primary econdary alc platinum ruthenium electrocatalyst.

This study shows remarkably different features between the oxidation of secondary and primary C3-C5 alcs. The oxidation of primary alcs. is controlled by the oxidative removal of blocking adsorbates, such as CO, formed after the dissociative adsorption of alc. mols. Conversely, secondary alcs. do not undergo dissociative adsorption and therefore their oxidation is purely controlled by the energetics of the elementary reaction steps. In this respect, a different role of Ru is revealed for the electrooxidation of primary and secondary alcs. on bimetallic Pt-Ru catalysts. Ru enhances the oxidation of primary alcs. via the established bifunctional mechanism, in which the adsorption of (hydr)oxide species that are necessary to remove the blocking adsorbates is favored. In contrast, the oxidation of secondary alcs. is enhanced by the Ru-assisted stabilization of an O-bound intermediate that is involved in the potential-limiting step. This alternative pathway enables the oxidation of secondary alcs. close to the equilibrium potential.

Journal of Catalysis published new progress about Adsorption. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Safety of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhu, Kaili published the artcileOne-Pot Synthesis of Tensile-Strained PdRuCu Icosahedra toward Electrochemical Hydrogenation of Alkene, Computed Properties of 584-02-1, the main research area is alkene lead ruthenium copper icosahedra one pot synthesis.

Electrochem. hydrogenation (ECH) uses electricity to drive proton (H+) reduction for hydrogenation, which can greatly reduce energy supply and environmental pollution, representing an ideal alternative to traditional thermal hydrogenation. In this work, we put forward tensile-strained PdRuCu alloy to promote ECH. Tensile strain promotes the adsorption of C=C by changing the d-band center. Meanwhile, alloying Ru and Cu into Pd lattice facilitates hydrogenation by weakening Pd-H bonding. Therefore, PdRuCu icosahedra display excellent ECH performance of 2-methyl-3-buten-2-ol (MBE) with specific activity of 227.4μmolMBE nm-2 min-1 at -0.3 V vs. reversible hydrogen electrode (RHE), about 16.1 and 10.5 times higher than that of com. Pd/C and Ru/C, resp. In addition, PdRuCu icosahedra was excellent in the scaling up of substrate concentration combined with anisyl alc. oxidation to produce high-value added anisaldehyde at anode. This work provides a guideline for the rational design of highly active and durable metallic catalyst in ECH.

ChemElectroChem published new progress about Adsorption. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Computed Properties of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts