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, Article, Chemical Communications (Cambridge, United Kingdom) called Ozonolysis of α-angelica lactone: a renewable route to malonates, Author is DellAcqua, Andrea; Wille, Lukas; Stadler, Bernhard M.; Tin, Sergey; de Vries, Johannes G., the main research direction is angelica lactone ozone ozonolysis; malonic acid preparation; malonate preparation; oxopropionate preparation.Computed Properties of C5H6O2.

Industrially relevant intermediates such as malonic acid, malonates and 3-oxopropionates waseasily accessed by ozonolysis of α-angelica lactone, derived from the platform chem. levulinic acid. The roles of the solvent and of the quenching conditions were of key importance for the outcome of the reaction.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Study of the Synchrotron Photoionization Oxidation of Alpha-Angelica Lactone (AAL) Initiated by O(3P) at 298, 550, and 700 K, published in 2021, which mentions a compound: 591-12-8, mainly applied to alpha angelica lactone synchrotron photoionization oxidation radiation; biofuel; multiplexed mass spectrometry; oxidation; reaction pathways; synchrotron photoionization, Safety of 5-Methylfuran-2(3H)-one.

In recent years, biofuels have been receiving significant attention because of their potential for decreasing carbon emissions and providing a long-term renewable solution to unsustainable fossil fuels. Currently, lactones are some of the alternatives being produced. Many lactones occur in a range of natural substances and have many advantages over bioethanol. In this study, the oxidation of alpha-angelica lactone initiated by ground-state at. oxygen, O(3P), was studied at 298, 550, and 700 K using synchrotron radiation coupled with multiplexed photoionization mass spectrometry at the Lawrence Berkeley National Lab (LBNL). Photoionization spectra and kinetic time traces were measured to identify the primary products. Ketene, acetaldehyde, Me vinyl ketone, methylglyoxal, di-Me glyoxal, and 5-methyl-2,4-furandione were characterized as major reaction products, with ketene being the most abundant at all three temperatures Possible reaction pathways for the formation of the observed primary products were computed using the CBS-QB3 composite method.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 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 Ozonolysis of α-angelica lactone: a renewable route to malonates. Author is DellAcqua, Andrea; Wille, Lukas; Stadler, Bernhard M.; Tin, Sergey; de Vries, Johannes G..

Industrially relevant intermediates such as malonic acid, malonates and 3-oxopropionates waseasily accessed by ozonolysis of α-angelica lactone, derived from the platform chem. levulinic acid. The roles of the solvent and of the quenching conditions were of key importance for the outcome of the reaction.

This literature about this compound(591-12-8)Synthetic Route of C5H6O2has given us a lot of inspiration, and I hope that the research on this compound(5-Methylfuran-2(3H)-one) can be further advanced. Maybe we can get more compounds in a similar way.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Liu, Zhenghui; Yang, Zhenzhen; Wang, Peng; Yu, Xiaoxiao; Wu, Yunyan; Wang, Huan; Liu, Zhimin published an article about the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8,SMILESS:O=C1OC(C)=CC1 ).Formula: C5H6O2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:591-12-8) through the article.

A cobalt-based catalytic system composed of Co(BF4)2·6H2O and ligand P(CH2CH2PPh2)3 was developed for hydrogenation of levulinic acid to γ-valerolactone (GVL), which showed high efficiency for this reaction, affording a GVL yield of 95% under atm. pressure and 100 °C. Co(BF4)2·6H2O combined with P(CH2CH2PPh2)3 is highly efficient for hydrogenation of levulinic acid to γ-valerolactone under atm. pressure.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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, LWT–Food Science and Technology called 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, the main research direction is propolis extract microencapsulation fish spoilage bacteria Lactobacillus.Application of 591-12-8.

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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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.Name: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride. The article 《Niobium based macromolecule preparation and its potential application in biomass derived levulinic acid esterification》 in relation to this compound, is published in Inorganic Chemistry Communications. Let’s take a look at the latest research on this compound (cas:591-12-8).

Niobium incorporated meso-tetra-(4-carboxyphenyl)-porphyrin (Nb-TCPP) was prepared for the first time and grafted through the axial position by the surface amine groups present on functionalized SBA-15 (SBA-AM). The synthesized TCPP ligand, Nb-TCPP complex, and the grafted Nb-TCPP-SBA-AM complex were thoroughly characterized by various anal. and spectroscopic techniques such as FTIR, UV-visible, DR UV-visible, CHN, 1H NMR, powder XRD, and N2 sorption studies. The catalytic activity of the homogeneous (Nb-TCPP) and the heterogenized (Nb-TCPP-SBA-AM) complex were explored for the esterification of levulinic acid. The studies revealed that Nb-TCPP and Nb-TCPP-SBA-AM showed comparatively good catalytic activity (74-80% conversion) for the esterification of levulinic acid using methanol under mild reaction conditions with the formation of Me levulinate and α-angelica lactone as the major products.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Continuous Hydrogenation of Ethyl Levulinate to 1,4-Pentanediol over 2.8Cu-3.5Fe/SBA-15 Catalyst at Low Loading: The Effect of Fe Doping, the main research direction is hydrogenation ethyl levulinate pentanediol catalyst iron doping; copper; doping; heterogeneous catalysis; hydrogenation; iron.Quality Control of 5-Methylfuran-2(3H)-one.

Bimetallic Cu-Fe catalysts with low loading were prepared for hydrogenation of Et levulinate (EL) to 1,4-pentanediol (1,4-PDO). Among them, 2.8Cu-3.5Fe/SBA-15 (Cu/Fe molar ratio of 1:1.5) performed best, capable of converting EL to the key intermediate γ-valerolactone (GVL) at 140 °C with 97 % yield. It can also be used to hydrogenate GVL to 1,4-PDO with 92.6 % selectivity or convert EL to 1,4-PDO in one pot. The high activity of the catalyst at such a low loading was attributed to the highly dispersed metal species and the Fe doping effect. Various characterization methods indicated that Fe acted as both structural and electronic modifier to promote the chem. properties of the Cu species. Besides, the incorporation of Fe provided abundant Lewis acid sites and accelerated the reaction process. CuFeO2 was detected by energy-dispersive X-ray spectroscopy, XPS, and XRD. On the basis of a combination of characterization and reaction kinetics, synergistic catalysis by Cu0 and CuFeO2 is considered to be responsible for the excellent performance of the Cu-Fe catalysts.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Scalable synthesis and polymerization of a β-angelica lactone derived monomer, the main research direction is angelica lactone monomer ROMP film property.Category: pyrimidines.

Bio-based levulinic acid is easily ring-closed to α-angelica lactone (α-AL). The α-AL can be isomerized to the conjugated β-AL under the influence of base, but since this is an equilibrium mixture it is very hard to devise a scalable process that would give pure β-AL. This problem was circumvented by distilling the equilibrium mixture to obtain a 90 : 10 mixture of β- and α-AL in 88% yield. This mixture was used for Diels-Alder reactions on 3 terpenes and on cyclopentadiene in up to 100 g scale. The latter DA adduct was subjected to a ROMP reaction catalyzed by the Grubbs II catalyst. The resulting polymer has some similarities to poly-norbornene but is more polar. The polymer can be processed into films with very good transparency.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.Lukic, Igor; Carlin, Silvia; Horvat, Ivana; Vrhovsek, Urska researched the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ).Computed Properties of C5H6O2.They published the article 《Combined targeted and untargeted profiling of volatile aroma compounds with comprehensive two-dimensional gas chromatography for differentiation of virgin olive oils according to variety and geographical origin》 about this compound( cas:591-12-8 ) in Food Chemistry. Keywords: volatile aroma compound virgin olive oil 2D GC; Comprehensive two-dimensional gas chromatography; Croatia; Geographical origin; Mono-dimensional; Multivariate analysis; Variety; Virgin olive oil; Volatile aroma compounds. We’ll tell you more about this compound (cas:591-12-8).

Comprehensive two-dimensional gas chromatog. with time-of-flight mass spectrometry (GC × GC-TOF-MS) was combined with conventional mono-dimensional GC-MS to differentiate Croatian virgin olive oils (VOO) according to variety and geog. origin, based on the profile of volatile aroma compounds isolated by HS-SPME. More than 1000 compounds were detected after untargeted profiling and 256 were identified or tentatively identified, providing one of the most detailed profiles of volatile aroma compounds in VOO up to date. Among them, 131 volatile compounds were significantly different across monovarietal VOOs, while 60 were found useful for the discrimination according to geog. origin. Many major lipoxygenase and minor non-lipoxygenase-generated compounds were shown to have discriminating ability with respect to both factors. Multivariate statistical anal. extracted twenty-one volatile markers with the highest discriminant power for varietal differentiation. The approach reported may have practical application in better understanding, defining, managing, and communicating the varietal or geog. typicity of monovarietal VOOs.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Construction of Enantioenriched γ,γ-Disubstituted Butenolides Enabled by Chiral Amine and Lewis Acid Cascade Cocatalysis, the main research direction is butenolide preparation enantioselective regioselective chemoselective; alkynoic acid aldehyde tandem cyclization amine Lewis catalyst.Recommanded Product: 591-12-8.

A cascade cocatalysis strategy for the facile construction of chiral γ,γ-disubstituted butenolides I (R1 = Me, Et; R2 = Ph, 1-naphthyl, 2-furyl, etc.) has been described. The synthetic manifold employs simple alkynoic acids R1CCCH2C(O)2H instead of the preformed silyloxy furans or 5-substituted furan-2(3H)-ones II. In situ formed 5-substituted furan-2(3H)-ones II by AgNO3 or Ph3PAuCl/AgOTf catalyzed cyclization of alkynoic acids can smoothly engage in the subsequent chiral diphenylprolinol TMS-ether catalyzed Michael and Michael-aldol reactions. The cascade process serves as a general approach to chiral quaternary γ,γ-disubstituted butenolides I.

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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia