Category: 584-02-1

Wu, Haijun published the artcilePromoting the conversion of poplar to bio-oil based on the synergistic effect of alkaline hydrogen peroxide, Application of 3-Pentanol, the main research area is bio oil conversion synergistic effect alk hydrogen peroxide.

The synergistic catalysis effect of NaOH and H2O2 on the hydrothermal liquefaction (HTL) of poplar was investigated and compared to the NaOH or H2O2 catalyzed HTL at different temperatures and 30 min residence time. GC-MS, GPC, FT-IR, HPLC and TGA were used to comprehensively characterize the phys. and chem. properties of liquefied products (bio-oil, lignin and solid residue). The results showed that the highest total bio-oil yield (70.65%) was obtained at 280°C with NaOH (35 g/L)/H2O2 (30 g/L) as catalysts. The average mol. weight and polydispersity index (PDI) were found to be lower compared to that from other conditions. As the NaOH concentration was increased, the bio-oil yield was improved. The concentration of H2O2 for the optimal synergistic effect was observed to be 30 g/L. GC-MS anal. showed that the bio-oil obtained by NaOH (35 g/L)/H2O2 (30 g/L) was characterized with the lowest N content. The synergistic effect promoted the higher production selectivity of o-xylene and p-xylene in the bio-oil.

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Antony, Binu published the artcilePheromone receptor of the globally invasive quarantine pest of the palm tree, the red palm weevil (Rhynchophorus ferrugineus), Formula: C5H12O, the main research area is Rhynchophorus ferrugineus pheromone receptor palm tree; Rhynchophorus ferrugineus ; aggregation pheromone; deorphanization; pheromone receptor; red palm weevil.

Palm trees are of immense economic, sociocultural, touristic, and patrimonial significance all over the world, and date palm-related knowledge, traditions, and practices are now included in UNESCOs list of the Intangible Cultural Heritage of Humanity. Of all the pests that infest these trees, the red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier), is its primary enemy. The RPW is a category-1 quarantine insect pest that causes enormous economic losses in palm tree cultivation worldwide. The RPW synchronizes mass gathering on the palm tree for feeding and mating, regulated by a male-produced pheromone composed of two methyl-branched compounds, (4RS, 5RS)-4-methylnonan-5-ol (ferrugineol) and 4(RS)-methylnonan-5-one (ferrugineone). Despite the importance of odorant detection in long-range orientation towards palm trees, palm colonization, and mating, the pheromone receptor has not been identified in this species. In this study, we report the identification and characterization of the first RPW pheromone receptor, RferOR1. Using gene silencing and functional expression in Drosophila olfactory receptor neurons, we demonstrate that RferOR1 is tuned to ferrugineol and ferrugineone and binds five other structurally related mols. We reveal the lifetime expression of RferOR1, which correlates with adult mating success irresp. of age, a factor that could explain the wide distribution and spread of this pest. As palm weevils are challenging to control based on conventional methods, elucidation of the mechanisms of pheromone detection opens new routes for mating disruption and the early detection of this pest via the development of pheromone receptor-based biosensors.

Molecular Ecology published new progress about Arecaceae. 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

Chang, Chaoyi published the artcileClassification of biomass reactions and predictions of reaction energies through machine learning, Quality Control of 584-02-1, the main research area is methanol propionic acid gas phase reaction energy.

Elementary steps and intermediate species of linearly structured biomass compounds are studied. Specifically, possible intermediates and elementary reactions of 15 key biomass compounds and 33 small mols. are obtained from a recursive bond-breaking algorithm. These are used as inputs to the unsupervised Mol2Vec algorithm to generate vector representations of all intermediates and elementary reactions. The vector descriptors are used to identify sub-classes of elementary steps, and linear discriminant anal. is used to accurately identify the reaction type and reduce the dimension of the vectors. The resulting descriptors are applied to predict gas-phase reaction energies using linear regression with accuracies that exceed the commonly employed group additivity approach. They are also applied to quant. assess model compound similarity, and the results are consistent with chem. intuition. This workflow for creating vector representations of complex mol. systems requires no input from electronic structure calculations, and it is expected to be applicable to other similar systems where vector representations are needed. (c) 2020 American Institute of Physics.

Journal of Chemical Physics published new progress about Algorithm. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Quality Control of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Qiu, Jiaqi published the artcileRecyclable DMAP-Functionalized polymeric nanoreactors for highly efficient acylation of alcohols in aqueous systems, Synthetic Route of 584-02-1, the main research area is DMAP functionalize block copolymer preparation thermal stability; alc anhydride heterogeneous catalyst acylation green chem; ester preparation.

In this study, small-mol. catalysts 4-(N,N-dimethylamino)pyridine (DMAP) functionalized nanoreactors were constructed by self-assembly of amphiphilic block copolymers with DMAP moieties in the hydrophobic block, leading to heterogeneous catalysts with excellent dispersity in water. The key preparation route included reversible addition-fragmentation chain transfer (RAFT) polymerization of 2-(N-methyl-N-(4-pyridyl)amino)ethyl methacrylate (MAPMA) and Me methacrylate (MMA) using poly (oligomeric (ethylene glycol) Me ether methacrylate) (POEGMA) as a hydrophilic macromol. RAFT reagent. The characterization by dynamic light scattering (DLS) and transmission electron microscopy (TEM) shows that the nanoreactors possess a core-shell nanostructure with the diameter of around 110 nm. The resulting polymeric nanoreactors showed excellent catalytic activity for acylation of alcs. in water. High conversion of a variety of alc. (>99%) and excellent product selectivity were achieved. The high catalytic efficiency of the nanoreactors may be attributed to the enhancement of the interaction between the reactant and the catalyst in the confined hydrophobic space, which simulates how enzymes usually work. Moreover, the catalyst was easily recovered by thermoresponsive separation and reused with high activity for more than 5 cycles. This study presents an efficient approach to achieve green catalytic reactions which were normally incompatible to aqueous conditions, potentially applicable to other catalytic systems such as metal-mediated organic transformations.

Polymer published new progress about Acylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Synthetic Route of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

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