Category: 1679-47-6

Electric Literature of 1679-47-6, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a article£¬once mentioned of 1679-47-6

Esterification and ketalization of levulinic acid with desilicated zeolite beta and pseudo-homogeneous model for reaction kinetics

To maximize the production of esters (E), keto (K) and keto-ester (KE) by esterification and ketalization of levulinic acid (LA) has been reacted using diols such as 1,2-propane diol (PDOL),1,2-ethane diol (EDOL), and 1,2,3-propane triol or glycerol (TRIOL) with desilicated Hbeta. This work aims to assess the conversion and selectivity for the production of esters using conventional and microwave-irradiated (MWI) reactors. Catalysts characterizations were performed using NH3-temperature programme desorption, Brunauer, Emmett and Teller surface area (BET), Barrett, Joyner, and Halenda (BJH), scanning electron microscope, transmission electron microscope, and dynamic light scattering. Operating parameters such as reaction temperature (170?180C), reaction time (20?80?min), feed composition (LA:PDOL/EDOL/TRIOL, 1:8/10/12), and microwave energy (300?500 watt) have been systematically investigated. Note that 99?100% conversion was achieved with the product selectivity of E (40%), K (30%), and KE (30%) with1,2-EDOL; E (56%), K (2%), and KE (17%) with 1,2-PDOL; E (69%), K(0%), and KE (22%) with TRIOL using D-Hbeta as a solid catalyst in an MWI reactor. Reaction paths and kinetics were studied using pseudo-homogeneous (PH) model.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C5H8O2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 1679-47-6

KINETIC RESOLUTION OF LACTONES BY ENANTIOSELECTIVE PROTONATION OF THE CORRESPONDING CARBOXYLATE WITH A CHIRAL ACID

Racemic lactones were optically activated through the hydrolysis with sodium hydroxide followed by the partial neutralisation with (1S)-(+)-10-camphorsulfonic acid in ethanol to afford R- or S-isomer with 99 – 38percent ee.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1679-47-6, name is 3-Methyldihydrofuran-2(3H)-one, introducing its new discovery. Application In Synthesis of 3-Methyldihydrofuran-2(3H)-one

Growth media affect the volatilome and antimicrobial activity against Phytophthora infestans in four Lysobacter type strains

Bacterial volatile organic compounds (VOCs) play important ecological roles in soil microbial interactions. Lysobacter spp. are key determinants of soil suppressiveness against phytopathogens and the production of non-volatile antimicrobial metabolites has been extensively characterised. However, the chemical composition and antagonistic properties of the Lysobacter volatilome have been poorly investigated. In this work, VOC emission profiles of four Lysobacter type strains grown on a sugar-rich and a protein-rich medium were analysed using solid-phase microextraction gas chromatography?mass spectrometry and proton transfer reaction-time of flight-mass spectrometry. Lysobacter antibioticus, L. capsici, L. enzymogenes and L. gummosus type strains were recognised according to their volatilome assessed using both headspace mass spectrometry methods Moreover, the chemical profiles and functional properties of the Lysobacter volatilome differed according to the growth medium, and a protein-rich substrate maximised the toxic effect of the four Lysobacter type strains against Phytophthora infestans. Antagonistic (pyrazines, pyrrole and decanal) and non-antagonistic (delta-hexalactone and ethanol) VOCs against Ph. infestans or putative plant growth stimulator compounds (acetoin and indole) were mainly emitted by Lysobacter type strains grown on protein- and sugar-rich media respectively. Thus nutrient availability under soil conditions could affect the aggressiveness of Lysobacter spp. and possibly optimise interactions of these bacterial species with the other soil inhabitants.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 1679-47-6, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a article£¬once mentioned of 1679-47-6

Selective and flexible transformation of biomass-derived platform chemicals by a multifunctional catalytic system

(Figure Presented) A sustainable supply chain: The controlled transformation of the biomassderived platform compounds levulinic acid (LA) and itaconic acid (IA) into the corresponding lactones, diols, or cyclic ethers (see picture) by using a multifunctional molecular catalyst is described.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 1679-47-6, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a Article£¬once mentioned of 1679-47-6

Gas-phase Protonation of Unsaturated Ethers: Experimental and Theoretical Study of 2,3- and 2,5-Dihydrofuran and Related Compounds

The protonation of 2,3- and 2,5-dihydrofuran is examined in gas-phase equilibrium proton transfer reactions conducted in an ion cyclotron resonance spectrometer.The thermodynamically favoured site of protonation in the two compounds is seen to be different: whereas the first isomer forms a carbocation upon protonation, the second isomer protonates on the oxygen atom an oxonium ion.The results obtained with substituted derivatives and with linear analogues confirm these conclusions.Molecular orbital calculations on the various structures for protonated bases are performed at the 4-31G level with correction for configuration interaction effects and at the 4-31G* level.The latter basis set provides the best results owing to the introduction of d-type orbitals on the oxygen atom.The calculation results substantiate the experimental observations and provide details on the molecular structure of the protonated species.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 1679-47-6. In my other articles, you can also check out more blogs about 1679-47-6

Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 1679-47-6, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a Article£¬once mentioned of 1679-47-6

Comprehensive two-dimensional gas chromatography with mass spectrometry applied to the analysis of volatiles in artichoke (Cynara scolymus L.) leaves

Artichoke (. Cynara scolymus L.) is well known due to its medicinal properties and, as a result, a large number of studies have been conducted to determine the chemical constituents produced by the plant. However, investigations were mainly focused on the non-volatile compounds, while the volatile constituents remained largely neglected. This study was aimed at obtaining a deeper understanding of the volatile composition of artichoke. For this propose, comprehensive two-dimensional gas chromatography coupled to a rapid scanning quadrupole mass spectrometer (GC. ¡Á. GC/qMS) and retention indices were used to improve the chemical characterization of volatiles from leaves. A total of 130 compounds were found, 109 of which are reported for the first time in C. scolymus L., including oxygenated monoterpenes, sesquiterpenes, oxygenated sesquiterpenes, norisoprenoids, lactones, alcohols, ketones and aldehydes. The major compounds were 1-octen-3-one (3.85%), (. E)-2-hexenal (3.75%), benzene acetaldehyde (2.90%), 2,2-dimethyl-4-pentenal (2.81%), beta-ionone (1.94%), furfural (1.65%), (. E)-beta-damescenone (1.59%), alpha-methyl-gamma-butirolactone (1.53%), benzaldehyde (1.47%) and dihydroactinidiolide (1.44%). The comprehensive GC. ¡Á. GC/qMS approach enabled a greater number of analytes to be identified, approximately four times higher than that obtained for GC/qMS. Additionally, the results imply that artichoke leaves are a potential source of volatile bioactive compounds.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Application In Synthesis of 3-Methyldihydrofuran-2(3H)-one. Introducing a new discovery about 1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one

Palladium-catalysed Conversion of Alkenols into Five- and Six-membered Ring Lactones at Room Temperature and Atmospheric Pressure

Unsaturated alcohols react with carbon monoxide, oxygen, palladium chloride, copper(II) chloride, and hydrochloric acid in tetrahydrofuran to give lactones in 42-80percent yield.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Synthetic Route of 1679-47-6, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a Chapter£¬once mentioned of 1679-47-6

The role of microorganisms in soy sauce production

Soy sauce is a salty condiment commonly used in Eastern Asia that is made from soy beans with varying amounts of wheat or no wheat at all. It is known as shoyu in Japan, chiang-yu (or -yi) in China, kecup in Indonesia, kunjang in Korea, toyo in The Philippines, and see-ieu in Thailand (Beuchat, 1985; Djien, 1982; Fukushima, 1989). It provides flavor in an otherwise bland diet, and nutritionally it provides salt (NaCl) and predigested proteins in a diet that is traditionally protein poor. It has been made for centuries on a small scale in many towns and villages in Asia, but since 1950, particularly in Japan, the manufacturing process has been studied and modernized so that its manufacture is now concentrated in large factories using modern, controlled methods of production (Sasaki & Nunomura, 1993). In Japan, soy sauce fermentation is a major food manufacturing activity. More than 1.1 million kiloliters of soy sauce was produced in 1986 by 3000 producers, and the Kikkoman Company supplied 30% of the market (Fukushima, 1989). By 1990 there were 2871 manufacturers, 5 of which produced about 50% of the total production (Sasaki & Nunomura, 1993). While modern methods are used for most of the soy sauce produced in Japan, and factory production in other Asian countries is growing, soy sauce is still produced by methods involving no modern technological inputs (Roeling, Prasetyo, Timotius, Stouthamer, & van Verseveld, 1994).

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Safety of 3-Methyldihydrofuran-2(3H)-one, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1679-47-6, name is 3-Methyldihydrofuran-2(3H)-one. In an article£¬Which mentioned a new discovery about 1679-47-6

Reactions of lactones with tropospheric oxidants: A kinetics and products study

Tropospheric lifetimes of two lactones, gamma-valerolactone (GVL) and alpha-methyl gamma-butyrolactone (AMGBL) in terms of their reactions with two important tropospheric oxidants- OH and Cl – are estimated, after determining the respective rate coefficients of their reactions in the gas phase using relative rate method. Values of the rate coefficients of the reactions of GVL (kOH?= (1.95?¡À?0.58) x 10?12; kCl?=?2.26?¡À?0.53?¡Á?10?11 cm3molecule?1s?1) and AMGBL (kOH?=?1.81?¡À?0.43?¡Á?10?12; kCl?=?3.42?¡À?0.63?¡Á?10?11 cm3molecule?1s?1) at 298?K imply that reaction with OH is the dominant reaction in the ambient conditions, and that reaction with Cl atom becomes relevant under marine boundary layer (MBL) conditions, reducing the tropospheric lifetimes to almost half. The tropospheric life times of GVL and AMGBL based on their reaction with OH under ambient conditions are comparable, 71.2 and 76.7?h respectively. However, the products of the reactions are found to be different. In GVL, a promising second generation biofuel component, only ring opening reactions are important, acetic acid and CO2 being the only observed volatile products. In AMGBL, additional ring oxidized products are also formed, of which 3,4-dihydro-3-methyl-2,5-furandione is the most dominant one. The absence of such ring oxidized products in GVL is assigned to the difference in the preferred position of H atom abstraction, based on the computed rate coefficients of individual channels reported in the literature. This suggests that the impact in terms of aerosol generation in the troposphere may also be different for GVL and AMGBL, which differ only in the position of methyl substitution.

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Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Synthetic Route of 1679-47-6, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a article£¬once mentioned of 1679-47-6

Selective Mono-methylation of Arylacetonitriles and Methyl Arylacetates by Dimethyl Carbonate

Both arylacetonitriles and methyl arylacetates react with dimethyl carbonate (DMC) (20 molar excess) at 180 – 200 deg C in the presence of K2CO3 to produce monomethylated 2-arylpropionitriles and methyl 2-arylpropionates, respectively, with a selectivity >99.5percent.The reaction, with wide application, proceeds by DMC acting as a methoxycarbonylating agent towards the ArCH-X anion (X = CN, CO2Me) and as a methylating agent to ArC-(CO2Me)X.DMC also proved to be the best solvent for such reactions.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 1679-47-6

Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem