Tag: M.W=0-100

Computed Properties of C5H6O2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Inhibitory activity of Co-microencapsulation of cell free supernatant from Lactobacillus plantarum with propolis extracts towards fish spoilage bacteria. Author is Kuley, Esmeray; Kuscu, Metanet Muhammet; Durmus, Mustafa; Ucar, Yilmaz.

Antibacterial properties of microencapsulated Lactobacillus plantarum cell-free supernatant (CFS) in combinations with aqueous or ethanolic propolis extract at doses of 1% against fish spoilage bacteria were investigated. Microencapsulated samples contained more than 17 compounds, of which furyl alc., acetic acid, maltol, and 2(5H) furanon were identified as common compounds The effects of microencapsulated CFS from L. plantarum in combination with or without propolis extracts on the fish spoilage bacteria varied according to the bacterial species. Among the fish spoilage bacteria, the highest antimicrobial activity of samples was observed against P. damselae with >15.5 mm inhibition diameter zone. Pure and microencapsulated CFS from L. plantarum showed the lowest antimicrobial effects on P. mirabilis with a corresponding inhibition diameter zone of 8.33 and 8.00 mm. Microencapsulated CFS from L. plantarum in combination with aqueous propolis extract had 25 mg/mL of MIC and 50 mg/mL of MBC on all bacteria although the bactericidal effect of microencapsulated samples in combination with ethanolic propolis extract occurred at a level of above 50 mg/mL. The study results revealed that co-microencapsulation of CFS obtained from L. plantarum with propolis extract, especially its aqueous extract, could be potentially used as antimicrobial agents to overcome microbial growth in foods.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Effect of processing and storage on the volatile profile of sugarcane honey: A four-year study.Electric Literature of C5H6O2.

Sugarcane honey (SCH) is a syrup from Madeira Island recognized by its unique and excellent aroma, associated to volatile organic compounds (VOCs) generated during the well-defined five stages of its traditional making process. The establishment of volatile profile throughout all SCH-making stages during four years, allowed the evaluation of the influence of each stage in the typical characterisitcs of SCH. One hundred eighthy seven VOCs were identified, being associated to several origins and formation pathways. VOCs formed during stage 1 and 2 were originate from raw material, and its oxidation (i.e. enzymic browning) and thermal degradation (i.e. lipid oxidation, Maillard reactions, Strecker degradation). In stage 3 and 4, the caramelization and melanoidin degradation also occurred, while in stage 5, the thermal degradation continues, followed by microbial activity. Chemometric anal. allowed to identify 35 VOCs as potential markers for processing control by the producers and as guarantee of the typicality and authenticity of SCH. Based on the obtained results, we propose for the first time an innovative schematic diagram explaining the potential reactions and pathways for VOCs formation during the different steps of the SCH production

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COA of Formula: C5H6O2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Diastereoselective multi-component tandem condensation: synthesis of 2-amino-4-(2-furanone)-4H-chromene-3-carbonitriles. Author is Gupta, Vijay; Sahu, Debashish; Jain, Shailja; Vanka, Kumar; Singh, Ravi P..

A general strategy for a one-pot stereoselective synthesis of 2-amino-4-(2-furanone)-4H-chromene-3-carbonitriles by reaction of salicylaldehyde, malononitrile and butenolides via a tandem Knoevenagel/Pinner/vinylogous Michael condensation is presented. The β,γ-butenolides gave a syn-selective MCR adduct with a dr up to 11.5 : 1. The mechanistic insight into the MCR was obtained by DFT calculations

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about An approach to identifying fibers and evolved compounds from flame resistant fabrics.HPLC of Formula: 591-12-8.

Flame resistant (FR) fabrics have use in civilian, military, and industrial applications. This work describes the development of a methodol. aimed at identifying the fiber composition of blended fabrics of unknown composition Here, FR fabrics used in military uniforms, are studied using a combination of XPS, isothermal thermogravimetric anal. (TGA) and pyrolysis gas chromatog./mass spectrometry (Py-GC-MS). Elemental anal. of the fabrics using XPS yielded a preliminary determination of the composition of the polymer(s) and aided in the identification of FR additives. TGA and Py-GC-MS experiments were used for subsequent compound identification. In TGA the temperature of mass loss events was compared to reference materials, and in Py-GC-MS the pyrolysis products of the blended FR fabrics were compared to those from a series of potential parent fibers. It was possible to discern the composition of the parent fibers and the type of FR treatment added to fabrics because the thermal decomposition chem. did not significantly change by blending the fibers to make fabrics.

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Latos, Piotr; Szelwicka, Anna; Boncel, Slawomir; Jurczyk, Sebastian; Swadzba-Kwasny, Malgorzata; Chrobok, Anna published the article 《Highly Efficient Synthesis of Alkyl Levulinates from α-Angelica Lactone, Catalyzed with Lewis Acidic Trifloaluminate Ionic Liquids Supported on Carbon Nanotubes》. Keywords: alkyl levulinate angelica lactone catalyst trifloaluminate supported carbon nanotube; Lewis acid ionic liquid catalyst supported alkyl levulinate MWCNT.They researched the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ).Name: 5-Methylfuran-2(3H)-one. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:591-12-8) here.

Levulinic acid esters (LAEs) were synthesized from α-angelica lactone and alcs., in a reaction catalyzed by a new family of chloride-free Lewis acidic ionic liquids, containing trifloaluminate anions, [Al(OTf)3+n]n-. Changing the catalyst from poorly soluble Al(OTf)3 (used as suspension) to fully homogeneous trifloaluminate ionic liquids resulted in shorter reaction times required for full α-AL conversion (60 min at 60 °C for 0.1 mol % catalyst loading) and unprecedented selectivities to LAEs, reaching >99%. Supporting the trifloaluminate ionic liquid on multiwalled carbon nanotubes gave an easily recyclable system, with no leaching observed over six cycles. Mechanistic considerations suggest that the propensity of Al(OTf)3 to undergo very slow hydrolysis results in the correct balance of Bronsted and Lewis acidic sites in the system, which inhibit byproduct formation.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-Methylfuran-2(3H)-one(SMILESS: O=C1OC(C)=CC1,cas:591-12-8) is researched.Synthetic Route of C4H7BrO3. The article 《Conversion of Biomass-Derived Methyl Levulinate to Methyl Vinyl Ketone》 in relation to this compound, is published in ACS Sustainable Chemistry & Engineering. Let’s take a look at the latest research on this compound (cas:591-12-8).

A high-throughput screening exercise testing 60 different catalysts resulted in 5 wt % Pt on sulfided carbon as the best catalyst in the conversion of bio-based Me levulinate (ML) to Me vinyl ketone (MVK) in a gas-phase continuous process. Up to 18% yield of MVK was obtained, but fast catalyst deactivation was observed For a better understanding of the reaction mechanism, the potential reaction intermediates [α-angelica lactone (α-AL), γ-valerolactone, Me Et ketone (MEK), and levulinic acid (LA)] were also fed as starting materials under the same reaction conditions as those used for ML. Of the different pathways possible, the route via AL seems to be the most likely route. Since the side product methanol led to the hydrogenation of MVK to MEK, LA is a better substrate in this reaction toward MVK at a medium reaction temperature Herein, we report the highest yield of MVK (>50%) from LA at 350°C. However, this knowledge of the reaction pathway via AL also opened up the possibility of a high-temperature conversion process of ML to MVK. It was found that ML could be converted to MVK in 71% selectivity at 600°C using 40% CaO on γ-Al2O3 as the catalyst. Here, the catalyst merely serves to accelerate the ring closure of ML to AL, which undergoes an electrocyclic reaction under extrusion of CO to form MVK.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about CuFe2O4 modified expanded graphite synthesized by urea-assisted hydrothermal method for tetracycline treatment through persulfate activation: Characterization, mechanism and degradation intermediates, the main research direction is copper iron oxide graphite hydrothermal catalytic oxidation wastewater treatment.HPLC of Formula: 591-12-8.

Owing to the stable crystal structure and wide range of pH applications, CuFe2O4 particles have been intensively concerned in the field of advanced oxidation, but their serious agglomeration and slow catalytic efficiency are still the stumbling blocks. The composite catalyst (EG-CuFe2O4-U) prepared by urea-assisted hydrothermal method with expanded graphite (EG) as the substrate immobilized CuFe2O4 not only exposed more active sites but also exhibited a higher electron transfer rate. Addnl., EG-CuFe2O4-U showed excellent performance in degrading tetracycline (TC) in model wastewater by activated peroxydisulfate (PDS). The synthesis mechanism of EG-CuFe2O4-U and the principle of urea in the formation of reduction environment were discussed in detail by the exptl. results of key preparation parameters and characterization. Meanwhile, several critical influencing factors were examined including PDS concentration, catalyst dosage, initial pH of the solution, and the change of pH in different systems. Furthermore, the removal efficiency and mineralization efficiency of TC (50 ppm) exceed 91% and 34.6%, on the conditions of 0.4 gL-1 EG-CuFe2O4-U, 6 mM PDS, initial solution pH of 4, and room temperature What′s more, the internal reaction mechanism of free radicals and non-free radicals in the EG-CuFe2O4-U/PDS system was further elaborated via scavenging tests, ESR (EPR). Finally, based on twenty-one principal intermediates of TC, four possible degradation pathways were proposed. In general, the catalyst with a rich pore structure and high catalytic activity has great potential in the effective activation of PDS and is prospective to be further applied in the field of antibiotic wastewater degradation

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Name: 5-Methylfuran-2(3H)-one. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Butenolide Derivatives of Biobased Furans: Sustainable Synthetic Dyes. Author is Saska, Jan; Li, Zheng; Otsuki, Andrew L.; Wei, Jiahui; Fettinger, James C.; Mascal, Mark.

The dye and pigment manufacturing industry is one of the most polluting in the world. Each year, over one million tons of petrochem. colorants are produced globally, the synthesis of which generates a large amount of waste. Naturally occurring, plant-based dyes, on the other hand, are resource intensive to produce (land, water, energy), and are generally less effective as colorants. Between these two extremes would be synthetic dyes that are fully sourced from biomass-derived intermediates. The present work describes the synthesis of such compounds, containing strong chromophores that lead to bright colors in the yellow to red region of the visible spectrum. The study was originally motivated by an early report of an unidentified halomethylfurfural derivative which resulted from hydrolysis in the presence of barium carbonate, now characterized as a butenolide of 5-(hydroxymethyl)furfural (HMF). The method has been generalized for the synthesis of dyes from other biobased platform mols., and a mechanism is proposed.

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Application In Synthesis of 5-Methylfuran-2(3H)-one. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Highly Efficient Synthesis of Alkyl Levulinates from α-Angelica Lactone, Catalyzed with Lewis Acidic Trifloaluminate Ionic Liquids Supported on Carbon Nanotubes. Author is Latos, Piotr; Szelwicka, Anna; Boncel, Slawomir; Jurczyk, Sebastian; Swadzba-Kwasny, Malgorzata; Chrobok, Anna.

Levulinic acid esters (LAEs) were synthesized from α-angelica lactone and alcs., in a reaction catalyzed by a new family of chloride-free Lewis acidic ionic liquids, containing trifloaluminate anions, [Al(OTf)3+n]n-. Changing the catalyst from poorly soluble Al(OTf)3 (used as suspension) to fully homogeneous trifloaluminate ionic liquids resulted in shorter reaction times required for full α-AL conversion (60 min at 60 °C for 0.1 mol % catalyst loading) and unprecedented selectivities to LAEs, reaching >99%. Supporting the trifloaluminate ionic liquid on multiwalled carbon nanotubes gave an easily recyclable system, with no leaching observed over six cycles. Mechanistic considerations suggest that the propensity of Al(OTf)3 to undergo very slow hydrolysis results in the correct balance of Bronsted and Lewis acidic sites in the system, which inhibit byproduct formation.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ) is researched.Safety of 5-Methylfuran-2(3H)-one.Wang, Xiao-Jun; Hong, Miao published the article 《Lewis-Pair-Mediated Selective Dimerization and Polymerization of Lignocellulose-Based β-Angelica Lactone into Biofuel and Acrylic Bioplastic》 about this compound( cas:591-12-8 ) in Angewandte Chemie, International Edition. Keywords: angelica lactone polymerization dimerization Lewis acid base pair catalyst; Lewis pair polymerization; biofuels; biomass; frustrated Lewis pair; sustainable polymers. Let’s learn more about this compound (cas:591-12-8).

This contribution reports an unprecedentedly efficient dimerization and the first successful polymerization of lignocellulose-based β-angelica lactone (β-AL) by utilizing a selective Lewis pair (LP) catalytic system, thereby establishing a versatile bio-refinery platform wherein two products, including a dimer for high-quality gasoline-like biofuel (C8-C9 branched alkanes, yield=87%) and a heat- and solvent-resistant acrylic bioplastic (Mn up to 26.0 kg mol-1), can be synthesized from one feedstock by one catalytic system. The underlying reason for exquisite selectivity of the LP catalytic system toward dimerization and polymerization was explored mechanistically.

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Pyrimidine | C4H4N2 – PubChem,
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