Tag: M.W=0-100

Computed Properties of C5H6O2. 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 Access to chiral γ-butenolides via palladium-catalyzed asymmetric allylic C-H alkylation of 1,4-dienes. Author is Dai, Zhen-Yao; Wang, Pu-Sheng; Gong, Liu-Zhu.

Allylic C-H alkylation of 1,4-pentadienes with α-angelica lactones has been developed by tri-axial phosphoramidite-palladium catalysis. This reaction can tolerate a range of functional groups under mild conditions, furnishing versatile chiral γ,γ-disubstituted butenolides I (R = Me, i-Pr, Cy, etc.; Ar = C6H5, 4-MeC6H4, 4-FC6H4, etc.) in high yields with good to high levels of stereoselectivity.

Here is just a brief introduction to this compound(591-12-8)Computed Properties of C5H6O2, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 591-12-8, is researched, Molecular C5H6O2, about Trimetallic Cu-Ni-Zn/H-ZSM-5 Catalyst for the One-Pot Conversion of Levulinic Acid to High-Yield 1,4-Pentanediol under Mild Conditions in an Aqueous Medium, the main research direction is trimetallic copper nickel zinc hydrogen ZSM5 catalyst levulinate pentanediol.Electric Literature of C5H6O2.

The one-pot direct conversion of levulinic acid (LA) to 1,4-pentanediol (1,4-PDO) was investigated over a trimetallic Zn-promoted Cu-Ni alloy on a H-ZSM-5 (Cu-Ni-Zn/H-ZSM-5) catalyst. Under mild reaction conditions at 130°C and a H2 pressure of 2.5 MPa for 6 h in an aqueous medium, almost complete conversion of LA to high-yield 1,4-PDO (93.4%) was achieved. The presence of the Zn promoter effectively suppressed the growth of the Cu-Ni alloy nanoparticles (NPs) on the surface of H-ZSM-5. Consequently, the reducibility of the Cu-Ni-Zn alloy was much higher than that of the Cu-Ni alloy. The numerous Lewis acid sites of the Cu-Ni-Zn/H-ZSM-5 catalyst enhanced the adsorption of LA, and the adsorbed LA was converted to γ-valerolactone (GVL) at the Bronsted acid sites of H-ZSM-5 followed by hydrogenation at the Cu-Ni alloy sites. Subsequently, the readsorption of GVL was activated at the Lewis acid sites and GVL underwent ring opening, followed by hydrogenation to form 1,4-PDO at the Cu-Ni alloy sites. The H2 spillover on the Zn-promoted Cu-Ni alloy NPs enhanced the hydrogenation of LA to 1,4-PDO. Because of the mild reaction conditions, the formation of coke and active site sintering was highly suppressed. In addition, metal leaching did not occur over the trimetallic Cu-Ni-Zn/H-ZSM-5 catalyst. Consequently, the Cu-Ni-Zn/H-ZSM-5 catalyst could be used for up to five cycles with minimal activity loss.

Compound(591-12-8)Electric Literature of C5H6O2 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.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Category: pyrimidines. 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 Nutritional value and volatiles of the edible mushroom Leucocalocybe mongolica. Author is Wang, X.; Bao, H.; Bau, T..

Leucocalocybe mongolica (S.Imai) X.D.Yu & Y.J.Yao is a rare edible wild mushroom that is highly regarded in northeast Asia. Owing to its desirable flavor and health attributes, L. mongolica is collected unscrupulously by indigenous peoples and mycophiles. In addition, its habitat is under constant threat from human activities, and the wild production continues to decline as it cannot keep pace with the rate of harvest. To date, no cultivation techniques that can produce L. mongolica have been discovered; however, utilizing fermentation technol. offers a promising alternative approach. In this study, the nutrients and volatile components of the products arising from two fermentation techniques were evaluated. Significant differences were observed between the fruiting bodies and the fermented products of L. mongolica with respect to protein, fat, and fiber contents. The results of gas chromatog.-mass spectrometry showed that 21 volatile components likely account for the flavor of basidiocarps. The two fermentation methods exhibited significant differences in terms of the enrichment of the different volatile compounds Comparison of the active components before and after solid-state fermentation on L. mongolica showed that the content of flavonoids, polysaccharides, triterpenoids, sterols, and phenols after solid-state fermentation was enhanced compared with the unleavened substrate. Given these results, solid-state fermentation technol. for L. mongolica appears to be a promising alternative to cultivation.

Compound(591-12-8)Category: pyrimidines 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.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.Name: 5-Methylfuran-2(3H)-one.Robichaux, Laura; Kendell, Shane published the article 《Mechanistic insights into furfuryl alcohol based biofuel production over phosphotungstate catalysts》 about this compound( cas:591-12-8 ) in Reaction Kinetics, Mechanisms and Catalysis. Keywords: furfuryl alc phosphotungstate catalyst alkylation charge transfer. Let’s learn more about this compound (cas:591-12-8).

A one-step direct alkylation method for synthesizing Bu levulinate from Bu alc. and furfuryl alc. has been explored. This process is carried out under reflux, at ∼ 120 °C for 2 h and utilizes a catalyst. Catalysts are based on phosphotungstic acid; the catalysts are modified via cation exchange, producing several cesium, copper and silver based phosphotungstates. Of these, the greatest activity and selectivity towards Bu levulinate was achieved over the Cu0.5H2[PW12O40] catalyst, with 100% conversion and a Bu levulinate selectivity of 69%. Various side reactions are also observed, with products that may also be suitable for biofuel applications. A detailed product anal. has been performed, and likely reaction schemes for these products have been determined Overall, these results demonstrate an efficient method for Bu levulinate production from biomass-derived sources.

Here is just a brief introduction to this compound(591-12-8)Name: 5-Methylfuran-2(3H)-one, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Computed Properties of C5H6O2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. 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.

Here is just a brief introduction to this compound(591-12-8)Computed Properties of C5H6O2, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Mechanism research on catalytic pyrolysis of sulfated polysaccharide using ZSM-5 catalysts by Py-GC/MS and density functional theory studies. Author is Jiang, Ding; Xia, Zhen; Wang, Shuang; Li, Hongping; Gong, Xun; Yuan, Chuan; El-Fatah Abomohra, Abd; Cao, Bin; Hu, Xun; He, Zhixia; Wang, Qian.

The mechanisms of primary product formation on catalytic pyrolysis of seaweed sulfated polysaccharide with ZSM-5 were examined in detail by using Py-GC/MS anal. and subsequent d. functional theory. Results showed that furfurals were the main product (50.3%) in bio-oil during the catalytic pyrolysis of sulfated polysaccharides. Furfural (9.1%), 5-(Hydroxymethyl)-2(5 H)-furanone (3.1%) and acetone (3.2%) were defined as typical products of Glucuronic acid unit. 5-Me furfural (41.2%), 5-methyl-2(3 H)-Furanone (0.5%) and 5-Me furan (5.4%) can be converted from rhamnose unit. The subsequent d. functional theory calculation indicated that the catalytic pyrolysis of sulfated polysaccharides by ZSM-5 catalyst could boost the pyrolysis and upgrade the bio-oil quality since the promotion of hydrodeoxygenation on catalytic reactions and ZSM-5 could promote the formation of 5-Me furfural. The hydrogen bonding and van der Waals force interactions improved the pyrolysis pathways and decreased the energy barrier, which promoted the pyrolysis. This study confirmed that ZSM-5 had a catalytic influence on pyrolysis of sulfated polysaccharides through theor. and exptl. anal., which is helpful to understand the formation mechanism of seaweed catalytic pyrolysis products.

Here is just a brief introduction to this compound(591-12-8)Computed Properties of C5H6O2, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.Name: 5-Methylfuran-2(3H)-one.

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.

Here is just a brief introduction to this compound(591-12-8)Name: 5-Methylfuran-2(3H)-one, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 591-12-8, is researched, Molecular C5H6O2, about One-pot conversion of furfural to gamma-valerolactone in the presence of multifunctional zirconium alizarin red S hybrid, the main research direction is furfural valerolactone zirconium alizarin red S.Reference of 5-Methylfuran-2(3H)-one.

A multifunctional Zr-containing catalyst (FM-Zr-ARS) was successfully synthesized by a modulated hydrothermal synthesis route. Systematic characterization results supported the presence of robust porous inorganic-organic frameworks stabilized by the strong coordination interaction of Zr4+ with oxygen-rich functional groups in Alizarin red S (ARS). Moreover, the -O-Zr-O- network in the FM-Zr-ARS structure formed a rich content of acid-base sites. In addition, the inherent sulfonic groups in ARS made the FM-Zr-ARS hybrids possess Bronsted acid sites. Therefore, under the synergistic catalysis of the multiple functional sites, FM-Zr-ARS showed remarkably high catalytic activity for γ-valerolactone (GVL) production from levulinate esters and furfural. Finally, 72.4% and 97.7% yields of GVL were obtained in the conversion of furfural and Et levulinate, resp., after 8 h of reaction at 433 K. On the basis of the role of different functional sites, a plausible catalytic mechanism was presented for the conversion of biomass-derived furfural to GVL.

Here is just a brief introduction to this compound(591-12-8)Reference of 5-Methylfuran-2(3H)-one, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Electric Literature 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 Biosynthesis of Pseudomonas-Derived Butenolides. Author is Klapper, Martin; Schlabach, Kevin; Paschold, Andre; Zhang, Shuaibing; Chowdhury, Somak; Menzel, Klaus-Dieter; Rosenbaum, Miriam A.; Stallforth, Pierre.

Butenolides are well-known signaling mols. in Gram-pos. bacteria. Here, we describe a novel class of butenolides isolated from a Gram-neg. Pseudomonas strain, the styrolides. Structure elucidation was aided by the total synthesis of styrolide A. Transposon mutagenesis enabled us to identify the styrolide biosynthetic gene cluster, and by using a homol. search, we discovered the related and previously unknown acaterin biosynthetic gene cluster in another Pseudomonas species. Mutagenesis, heterologous expression, and identification of key shunt and intermediate products were crucial to propose a biosynthetic pathway for both Pseudomonas-derived butenolides. The Whole Genome Shotgun project for P. fluorescens HKI0874 has been deposited at DDBJ/ENA/GenBank under the accession VCNJ00000000.

Here is just a brief introduction to this compound(591-12-8)Electric Literature of C5H6O2, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

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, Catalysis Today called Mechanism study on asymmetric Michael addition reaction between alkynone and α-angelica lactone catalyzed by chiral N, N’-dioxide-Sc(III) complex, Author is Zuo, Yini; Meng, Xiangxiang; Hu, Changwei; Li, Jing; Su, Zhishan, the main research direction is butenolide alkynone scandium catalyst Michael addition mechanism bond order.Safety of 5-Methylfuran-2(3H)-one.

The reaction mechanism and enantioselectivity of asym. Michael addition reaction between alkynone (R1) with α-angelica lactone (R2) catalyzed by chiral N, N’-dioxide-Sc(III) complex were investigated at the M06/6-31G(d,p) (acetonitrile, SMD) level. The α-angelica lactone substrate could isomerize to the active enolized form in the presence of Sc(OTf)3 reagent, assisted by the counter trifluoromethanesulfonate anion OTf-. The alkynone substrate and enolized angelica lactone (or its anion) coordinated to Sc(III) center of N,N’-dioxide-Sc(III) complex catalyst simultaneously, forming a high active hexacoordinate-Sc(III) complex. The catalytic reaction occurred via a two-step mechanism, in which C2-Cγ bond formation was predicted to be the chirality-controlling step as well as the rate-determining step, affording predominant S-enantiomer. The counterion OTf- facilitated C-H construction as a proton-shuttle, producing mainly E-configuration product observed in experiment The steric repulsion from the ortho-substituent of amide moiety as well as the chiral backbone of N, N’-dioxide-Sc(III) catalyst played the key role for chiral induction in the asym. reaction. The less destabilizing Pauli repulsion and more stabilizing attractive interaction, especially the orbital interaction, along the si-face attack pathway enhanced the enantiodifference of the two competing pathways for high enantioselectivity. The energy barriers for E/Z isomerization of S or R-enantiomer assisted by HOTf was as high as 34.6-35.0 kcal mol-1, indicating that the product with Z-conformation was difficult to be obtained. These results were in good agreement with exptl. observations.

Here is just a brief introduction to this compound(591-12-8)Safety of 5-Methylfuran-2(3H)-one, more information about the compound(5-Methylfuran-2(3H)-one) is in the article, you can click the link below.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia