Tag: M.W=0-100

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 591-12-8, is researched, SMILESS is O=C1OC(C)=CC1, Molecular C5H6O2Journal, Asian Journal of Chemistry called Study on the effect of dual solvent proportions on composition of Rosa x damascena concrete oil obtained using soxhlet extraction method, Author is Sofiya, K.; Kumar, G. Bharath, the main research direction is phenylethyl alc concrete oil soxhlet extraction Rosa damascena.Recommanded Product: 591-12-8.

Concrete oil was extracted from Rosa x damascena using different percentage ratios of solvents (petroleum ether and ethanol) by the Soxhlet extraction method. The extraction was carried out using petroleum ether and ethanol in five different percentage ratios of (volume/volume) (100:0, 75:25, 50:50, 25:75, 0:100) (petroleum ether:ethanol). The rotary vacuum evaporator was used to sep. concrete oil and the solvents. The extracted concrete oil was analyzed using gas chromatog.-mass spectrometry (GC-MS) technique. The obtained results show that many new compounds were identified, at two different solvents and its ratios. Phenylethyl alc. in the percentages of (61.71%), (10.07%) and (25.92%) was obtained as a major compound with the solvent percentages of (100:0), (50:50) and (75:25) (PE:E), resp. Hexacosane (37.2%) was identified as a major compound when pure ethanol is used as a solvent. The highest number of components were identified (totally 93 components) when an equal percentage (50:50) of petroleum ether and ethanol were mixed. The usual monoterpenes components, e.g. geraniol, nerol, citronellol and linalool, were not found in the present extraction study. This study concludes that the compositions of concrete oil were mainly influenced by the type of solvents and its ratios used for the extraction

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Pyrimidine | C4H4N2 – PubChem,
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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 Cigar leaf differences from different producing areas based on aroma component analysis.Reference of 5-Methylfuran-2(3H)-one.

In order to investigate the leaf aroma chem. differences for cigar samples from different producing areas, 79 aroma components in 47 cigar samples from different countries were determined In addition, the differences in contents and odor activity values of aroma components among Cuban cigars, foreign non-Cuban cigars and Chinese cigars were compared by significance tests. The results showed that there were significant differences in the contents of 43 aroma components among the cigars from different producing areas, and the differences in the contents of α-curcumene and cedrol were the most significant. The contents of degradation products from chlorophyll and cembranoids in Cuban cigars were higher, those of phenylalanines and labdanums in foreign non-Cuban cigars and that of chlorophyll in Chinese cigars were lower. The 79 aroma components had higher odor activity values in fruit and flower flavors. Cuban cigars had higher odor activity values in herbal spices, fruit, flower and other flavors. Foreign non-Cuban cigars had lower odor activity values in plant, fruit, nut, flower and other flavors. The discriminant functions established by taking the contents of aroma components as variables can distinguish the producing areas of com. cigars.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Efficient synthesis of niobium pentoxide nanowires and application in ethanolysis of furfuryl alcohol, published in 2020, which mentions a compound: 591-12-8, mainly applied to niobium pentoxide nanowire furfuryl alc ethanolysis, Reference of 5-Methylfuran-2(3H)-one.

Nb2O5 nanowires with high sp. surface area and crystallinity were prepared by using ammonium oxalate and an acetic acid solvent system. The nanomaterial was applied in ethanolysis of furfuryl alc. (FA), and the yield of the product, 2-(ethoxymethyl)furan (FEE), achieved was up to 79.6%. Compared to mesoporous Nb2O5 materials and other porous materials, the residence time of FEE on the surface of the catalyst is shorter, and the yield of Et levulinate (EL) is lower. Furthermore, a high temperature calcination treatment can change the acid sites and acidity type distribution on the nanowire surface. By XRD, NH3O5 -TPD, IR, and TG-DTA determination methods, it was found that the weak and medium-strong acid sites on the surface of Nb2O5 nanowires were reduced after a 300°C treatment, and the amount of strong acid was relatively higher. According to the catalytic performance test data and acidity determination, it was concluded that more weak acid and medium-strong acid sites improve the conversion of furfuryl alc. to FEE, and the strong acid sites promote further conversion of FEE to EL.

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Quality Control of 5-Methylfuran-2(3H)-one. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about 5-(Chloromethyl)furfural (CMF): A Platform for Transforming Cellulose into Commercial Products.

5-(Chloromethyl)furfural (CMF) is a carbohydrate-derived platform mol. that is gaining traction as a more practical alternative to 5-(hydroxymethyl)furfural (HMF). This perspective introduces the chemocatalytic approach to biorefining as the driving force behind the development of multifunctional chem. platforms. The main advantage of CMF over HMF is that it can be produced in high yield under mild conditions directly from raw biomass. Its stability and hydrophobicity markedly facilitate isolation. CMF is also a precursor to levulinic acid (LA), another versatile biobased intermediate. The logistics of CMF production are discussed, including reactor materials, HCl handling and management, byproducts, and the fate of collateral biomass components (hemicellulose, lipids, proteins, lignin). Examples of com. markets that can be unlocked by synthetic manipulation of CMF are broken out into two derivative manifolds, furanic and levulinic, which are distributed over three product family trees: renewable monomers, fuels, and specialty chems. Selected examples of CMF- and LA-based routes to these products are presented. Finally, a model for the integration of the CMF process into biorefinery practice is put forward.

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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 591-12-8, is researched, SMILESS is O=C1OC(C)=CC1, Molecular C5H6O2Journal, Journal of Catalysis called Investigation of solvent effects in the hydrodeoxygenation of levulinic acid to γ-valerolactone over Ru catalysts, Author is Mamun, Osman; Saleheen, Mohammad; Bond, Jesse Q.; Heyden, Andreas, the main research direction is levulinic acid hydrodeoxygenation valerolactone ruthenium catalyst solvent effect.Application In Synthesis of 5-Methylfuran-2(3H)-one.

Liquid phase, reductive deoxygenation of biomass derived platform chems. over transition metal surfaces constitutes an efficient scheme for upgrading lignocellulosic biomass. The solvation effects on the reaction kinetics of the hydrodeoxygenation (HDO) of levulinic acid (LA) towards the formation of γ-valerolactone (GVL) over Ru(0 0 0 1) has been studied in three condensed phase media, i.e., liquid water, methanol, and 1,4-dioxane. Detailed microkinetic models have been developed incorporating various catalytic pathways including formation of 4-hydroxypentanoic acid (HPA) and α-angelicalactone (AGL) to simulate the catalytic activity of Ru(0 0 0 1) under various reaction conditions of solvent, temperature, and partial pressures. Our microkinetic models suggest that direct catalytic conversion with alkoxy formation is the preferred reaction mechanism in all reaction environments. Furthermore, we find that water facilitates the reaction kinetics significantly and that the solvent effect is strongest at lower temperatures (T < 373 K). Here, rate increases due to liquid water solvation effects of 2-4 orders of magnitude are observed All solvents increase the rate of reaction relative to the gas phase; however, solvation effects decrease with decrease in polarity. 1,4-dioxane increases the rate only minimally due to competitive adsorption of the solvent mols. despite facilitating the partially rate controlling step of the LA hydrogenation to an alkoxy intermediate. Compound(591-12-8)Application In Synthesis of 5-Methylfuran-2(3H)-one received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-Methylfuran-2(3H)-one), if you are interested, you can check out my other related articles.

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Pyrimidine | C4H4N2 – PubChem,
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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 Cigar leaf differences from different producing areas based on aroma component analysis, the main research direction is cigar leaf aroma component.Electric Literature of C5H6O2.

In order to investigate the leaf aroma chem. differences for cigar samples from different producing areas, 79 aroma components in 47 cigar samples from different countries were determined In addition, the differences in contents and odor activity values of aroma components among Cuban cigars, foreign non-Cuban cigars and Chinese cigars were compared by significance tests. The results showed that there were significant differences in the contents of 43 aroma components among the cigars from different producing areas, and the differences in the contents of α-curcumene and cedrol were the most significant. The contents of degradation products from chlorophyll and cembranoids in Cuban cigars were higher, those of phenylalanines and labdanums in foreign non-Cuban cigars and that of chlorophyll in Chinese cigars were lower. The 79 aroma components had higher odor activity values in fruit and flower flavors. Cuban cigars had higher odor activity values in herbal spices, fruit, flower and other flavors. Foreign non-Cuban cigars had lower odor activity values in plant, fruit, nut, flower and other flavors. The discriminant functions established by taking the contents of aroma components as variables can distinguish the producing areas of com. cigars.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Quality Control of 5-Methylfuran-2(3H)-one. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Humins with Efficient Electromagnetic Wave Absorption: A By-Product of Furfural Conversion to Isopropyl Levulinate via a Tandem Catalytic Reaction in One-Pot. Author is Ma, Mingwei; Liang, Na; Hou, Pan; Zhang, Peng; Cao, Jingjie; Liu, Hui; Xu, Xingliang; Yue, Huijuan; Tian, Ge; Feng, Shouhua.

Both one-pot catalytic conversion of furfural (FAL) to iso-Pr levulinate (PL) and carbonization of byproduct (humins) for electromagnetic wave absorption are discussed, which provides inspiration that humins can be applied to electromagnetic wave absorption. In the former, phosphotungstic acid (PW) is employed as a homogeneous catalyst to convert FAL to PL via a tandem reaction in one pot, with the formation of a vast amount of humins. With FAL and various intermediates as substrates, it was found that humins was a polymerization product of FAL, furfuryl alc. (FOL) and furfuryl ester (FE) with furan rings. In addition, the in situ attenuated total reflection IR (ATR-IR) spectra also provided a basis for the proposed reaction route. In the latter, with the humins as raw material, P species and WO3 doped nano-porous carbon (Humins-700) platform formed after high-temperature annealing is used for electromagnetic wave absorption and manifests desirable absorption performance. The min. reflection loss (RLmin) value is -47.3 dB at 13.0 GHz with a thickness of 2.0 mm and the effective absorption bandwidth reaches 4.5 GHz (11.2-5.7 GHz).

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Pyrimidine | C4H4N2 – PubChem,
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Singh, Nitesh; Mansoori, Aadil; Jiwani, Gitanjali; Solanke, Amolkumar U.; Thakur, Tarun K.; Kumar, Rakesh; Chaurasiya, Mona; Kumar, Anirudh published the article 《Antioxidant and antimicrobial study of Schefflera vinosa leaves crude extracts against rice pathogens》. Keywords: Xanthomonas Magnaporthe Schefflera leaf histone deacetylase antioxidant antimicrobial.They researched the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ).Application In Synthesis of 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.

Plant extracts are one of the best possible sources of bioactive mols., and are being used globally as an antioxidants and natural antimicrobial compounds In current study, Schefflera vinosa leaves extract was prepared through Soxhlet extraction procedure using methanol and chloroform as solvents. The extract was investigated for total antioxidant, phenolic and flavonoid contents, free radical scavenging and antimicrobial activities. The free radical scavenging activities were evaluated through 2,2- diphenyl-1-picrylhydrazyl (DPPH), 2,2-azino-bis-3-ethylbenzotiazolin-6-sulfonic acid (ABTS) and Ferric-reducing/ antioxidant power (FRAP) assay. The antimicrobial activity of extract was determined through poisoned food method. The methanolic extract has exhibited high antioxidant, phenolic, and flavonoid activities compared to chloroform extract Similarly, free radical scavenging activities (ABTS, DPPH and FRAP) were higher in methanolic extract Further, Fourier-Transform IR Spectroscopy (FTIR) used to determine the functional group and Gas chromatog.-mass spectrometry (GC-MS) to elucidate volatile composition of the crude extract Different functional group like N-H, O-H, C-O, C-N, C-H, C=O, C≃C and C-O-H presence indicate the existence of many metabolites in the extracts GC-MS study identified 61 compounds and subsequently, these mols. were screened virtually using DockThor. Furthermore, antimicrobial study was confirmed against rice pathogens like Magnaporthe oryzae (M. oryzae) and Xanthomonas oryzae pv. oryzae (Xoo). Mol. docking study further suggested that phytomols. (3-Isopropoxy-1,1,1,7,7,7-hexamethyl-3,5,5-tris (trimethylsiloxy) tetrasiloxane, and 2-Methoxy-5-methylthiophene) targets Histone Deacetylase (HDAC) of M. oryzae and Peptide Deformylase (PDF) of Xoo, which could inhibit their growth. Hence, this study indicated that Schefflera vinosa extracts could be an important ingredient as an antioxidant as well as antimicrobial agent against rice pathogens.

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Pyrimidine | C4H4N2 – PubChem,
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HPLC of Formula: 591-12-8. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Catalytic C-C coupling of furanic platform chemicals to high carbon fuel precursors over supported ionic liquids.

Imidazolium-based ionic liquid (IL) catalysts with different anions (Cl-, HSO4-, and CF3SO3-) were covalently anchored to the surface of fibrous silica (FS) by using alkyl chains as a linker. The prepared catalysts were applied for the C-C coupling reactions of 2-methylfuran (2-MF) with levulinic acid (LA), angelica lactone (AL), and Et levulinate (EL) to synthesize high carbon fuel precursors. The hydrophilic nature of FS supported IL catalyst having bisulfate anion was suitable for the self C-C coupling reaction of 2-MF and the reaction of 2-MF with LA. FS supported IL catalyst having triflate anion (FS-ILCF3SO3) exhibited high conversion and selectivity for the target fuel precursors from the C-C coupling reaction of 2-MF with AL and EL. The increased solubility, tunable acidity, and hydrophilicity/hydrophobicity of FS-ILHSO4 and FS-ILCF3SO3 promise a sustainable catalyst system. Supported ILs make the transformation processes greener and more efficient for large-scale production of biomass-derived fuel precursors.

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Romaniszyn, Marta; Gronowska, Katarzyna; Albrecht, Lukasz published the article 《Remote Functionalization of 4-(Alk-1-en-1-yl)-3-Cyanocoumarins via the Asymmetric Organocatalytic 1,6-Addition》. Keywords: dihydrofuranyl ethyl oxo chromene carbonitrile preparation diastereoselective enantioselective regioselective; alkenyl cyanocoumarin furanone organocatalytic addition.They researched the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ).Recommanded Product: 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.

An organocatalytic 1,6-addition using 4-(alk-1-en-1-yl)-3-cyanocoumarins as acceptors was developed. Dienolates derived from 5-substituted-furan-2(3H)-ones have been employed as pronucleophiles, therefore, enabling the synthesis of hybrid mols. bearing two biol. relevant units I [R = H, 7-MeO, 6-Br, etc.; R1 = Me, allyl, Ph, etc.; R2 = H, Me; R3 = H, Me]. Appropriate design of substrates and the application of quinine-derived catalyst resulted in very good site-selectivity as well as chem. and stereochem. efficiency of the process.

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