Category: 7331-52-4

7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, belongs to tetrahydrofurans compound, is a common compound. HPLC of Formula: C4H6O3In an article, once mentioned the new application about 7331-52-4.

A microwave assisted extraction method coupled with solvent assisted flavor evaporation (MAE-SAFE) was used to extract the volatiles from three-selected Chinese dry-cured hams (Jinhua ham, Xuanwei ham and Rugao ham). Extracts were analyzed by comprehensive two-dimensional gas chromatography with high-resolution time-of-flight mass spectrometry (GC × GC/HR-TOFMS), gas chromatography?mass spectrometry (GC?MS), respectively. A total 165 volatile compounds were identified by GC × GC/HR-TOFMS while only 50 compounds were identified by GC?MS. Principal component analysis showed that the specific dominant volatile compounds were [S-(R*,R*)]-2,3-butanediol (26.39%) and 3-methyl-butanoic acid (7.53%) for Jinhua ham, were [R-(R*,R*)]-2,3-butanediol (16.85%) and acetic acid (8.25%) for Rugao ham and were dihydro-4-hydroxy-2(3H)-furanone (11.67%) and hexanoic acid (8.24%) for Xuanwei ham. The results not only provided a fast and mild extraction method to analyze the volatiles in non-volatile food matrices, but also represented the detailed information of volatile profiles of Chinese dry-cured hams.

Do you like my blog? If you like, you can also browse other articles about this kind. Thanks for taking the time to read the blog about 7331-52-4

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

7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, belongs to tetrahydrofurans compound, is a common compound. name: (S)-4-Hydroxydihydrofuran-2(3H)-oneIn an article, once mentioned the new application about 7331-52-4.

Chemical composition of two European woods: spruce (Picea abies L.), beech (Fagus sylvatica L.) and three African biomass residues: iroko (Chlophora excelsa L.), albizia (Albizia adianthifolia L.), and corncob (Zea mays ssp.) have been studied at temperatures between 300 and 700 C using an analytical pyrolysis unit. The relative amounts of volatile products in individual biomass were largely influenced by pyrolysis temperature and metal content. Most condensable volatile products attained maximum yield between 450 C and 500 C. Nearly all lignin derived compounds decomposed to low molecular aromatic compounds at high temperature (650-700 C) due to severe fragmentation of the aryl substituent. Improved yields in aromatic products observed at high temperatures are related to lignin units of individual biomass. The removal of exchangeable ions in the biomasses resulted in predominance of depolymerisation and dehydration reactions as favoured decomposition pathways for holocellulose. This is exemplified by the reduction in yields of holocellulose-derived low molecular products and enhancement in the formation of anhydrosugars and high molecular furan and pyran products. However, no preferential improvement in the yield of affected volatile products was observed in African biomasses compared to European biomasses as expected following the removal of the ions by the use of diluted acid and distilled water.

Do you like my blog? If you like, you can also browse other articles about this kind. Thanks for taking the time to read the blog about 7331-52-4

Reference：
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, 7331-52-4, name is (S)-4-Hydroxydihydrofuran-2(3H)-one, introducing its new discovery. COA of Formula: C4H6O3

The present invention relates to a process for preparing pure 3-hydroxy-gamma-butyrolactone by hydrolyzing 4-chloro-3-hydroxy-butyronitrile in the presence of acids and conducting cyclization reaction under slightly basic condition.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 7331-52-4, and how the biochemistry of the body works.COA of Formula: C4H6O3

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

Synthetic Route of 7331-52-4, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, molecular formula is C4H6O3. In a Patent，once mentioned of 7331-52-4

The present invention provides novel compounds useful in modulating the protein tyrosine kinase activity, and in modulating inter- and/or intra-cellular signaling. The invention also provides pharmaceutically acceptable compositions comprising such compounds and methods of using the compositions in the treatment of hyperproliferative disorders in mammals, especially humans.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 7331-52-4, and how the biochemistry of the body works.Synthetic Route of 7331-52-4

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

Electric Literature of 7331-52-4, 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.7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, molecular formula is C4H6O3. In a article，once mentioned of 7331-52-4

A process of the present invention produces a hydroxylactone by subjecting an unsaturated carboxylic acid having a double bond not conjugated to a carboxyl group or an ester thereof to (i) a reaction with hydrogen peroxide in the presence of a metallic compound containing a metallic element selected from W, Mo, V and Mn or (ii) a reaction with a peroxide containing the metallic element to thereby yield a corresponding hydroxylactone having a hydroxyl group combined with one of carbon atoms constituting the double bond and being cyclized at the other carbon atom position. The metallic compound may be one selected from oxides, oxoacids and salts thereof. The unsaturated carboxylic acid includes, for example, beta,gamma-unsaturated carboxylic acids, gamma,delta-unsaturated carboxylic acids, and delta,epsilon-unsaturated carboxylic acids. The process can produce hydroxylactones in high yields at low cost.

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 7331-52-4

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

Synthetic Route of 7331-52-4, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 7331-52-4, (S)-4-Hydroxydihydrofuran-2(3H)-one, introducing its new discovery.

Rhizome of cassava plants (Manihot esculenta Crantz) was catalytically pyrolysed at 500 C using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) method in order to investigate the relative effect of various catalysts on pyrolysis products. Selected catalysts expected to affect bio-oil properties were used in this study. These include zeolites and related materials (ZSM-5, Al-MCM-41 and Al-MSU-F type), metal oxides (zinc oxide, zirconium (IV) oxide, cerium (IV) oxide and copper chromite) catalysts, proprietary commercial catalysts (Criterion-534 and alumina-stabilised ceria-MI-575) and natural catalysts (slate, char and ashes derived from char and biomass). The pyrolysis product distributions were monitored using models in principal components analysis (PCA) technique. The results showed that the zeolites, proprietary commercial catalysts, copper chromite and biomass-derived ash were selective to the reduction of most oxygenated lignin derivatives. The use of ZSM-5, Criterion-534 and Al-MSU-F catalysts enhanced the formation of aromatic hydrocarbons and phenols. No single catalyst was found to selectively reduce all carbonyl products. Instead, most of the carbonyl compounds containing hydroxyl group were reduced by zeolite and related materials, proprietary catalysts and copper chromite. The PCA model for carboxylic acids showed that zeolite ZSM-5 and Al-MSU-F tend to produce significant amounts of acetic and formic acids.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Synthetic Route of 7331-52-4. In my other articles, you can also check out more blogs about 7331-52-4

Reference：
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. HPLC of Formula: C4H6O3. Introducing a new discovery about 7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one

The mechanism of fast pyrolysis of cellulose has been studied by using an analytical pyrolyzer coupled with a gas chromatography-mass spectrometry set-up (Py-GC/MS). The results showed that the main products comprised pyrans such as levoglucosan and levoglucosenone, furans such as furfural and 5-hydroxymethyl furfural, and linear small molecular chemicals such as acetaldehyde and 1-hydroxy-2-propanone. The compositions of products from fast pyrolysis of cellubiose and glucose were similar to that from cellulose, but with higher furan contents and lower pyran contents. Based on the experimental results, density functional theory (DFT) studies were carried out to deduce the pyrolysis mechanism of cellulose. The results showed the formation of 5-hydroxymethyl furfural from d-glucopyranose unit to be easier than the formation of levoglucosan, in agreement with the experimental results. The deduced mechanism of reaction pathways in cellulose pyrolysis provides insight into the pyrolysis behavior of cellulose and allows modification of previously proposed related mechanisms.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.HPLC of Formula: C4H6O3, you can also check out more blogs about7331-52-4

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

Reference of 7331-52-4, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 7331-52-4, molcular formula is C4H6O3, introducing its new discovery.

This study demonstrates a simple method for one-step isolation of the main secondary metabolites of a hydroalcoholic extract of Crocus sativus stigmas (saffron) using step-gradient centrifugal partition chromatography. The analysis was performed in dual and elution?extrusion mode, using five biphasic systems of the solvents heptane/ethyl acetate/butanol/ethanol/water in ratios of 4:10:0:4:10, 1:13:0:4:10, 1:12:1:4:10, 1:10:3:4:10, and 1:7:6:4:10. Five major crocins, picrocrocin, and crocetin were directly isolated in one step. Scaling up to preparative level, allowed the recovery of significantly high quantities of pure compounds, especially trans-crocin-4, saffron’s principal crocin. Comparing dual-mode and elution-extrusion, in dual-mode, the trans-crocin-4 containing fractions were co-eluted with a high amount of free beta-d-glucose. In contrast, absence of free beta-d-glucose was observed in the corresponding trans-crocin-4 fractions obtained by the second method denoting its superiority against dual-mode. Initiating analysis with the 4th solvent-system afforded selective isolation of trans-crocin-4, with reduction in experimental time and solvent consumption. Structure elucidation was performed by nuclear magnetic resonance spectroscopy, liquid chromatography with mass spectrometry, and high-resolution tandem mass spectrometry. The proposed methodology comprises an integrated approach for the purification and characterization of biologically active saffron components in a fast, selective, and environmentally friendly manner.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 7331-52-4 is helpful to your research. Reference of 7331-52-4

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

Synthetic Route of 7331-52-4, 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. 7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, molecular formula is C4H6O3. In a Article，once mentioned of 7331-52-4

A group of 14 different bio-sourced, renewable feedstocks (homoserine, 1; glutamic acid, 2; aspartic acid, 3; 2,5-furandicarboxylic acid, 4; fumaric acid, 5; oxalacetic acid, 6; tartaric acid, 7; malic acid, 8; succinic acid, 9; levulinic acid, 10; gamma-hydroxybutyrolactone, 11; xylitol, 12; mannitol, 13; sorbitol, 14) have been examined for their solubility/miscibility in a variety of ‘green’ solvents, including water, supercritical carbon dioxide (scCO 2), and ionic liquids. Two other bio-based compounds 5-hydroxymethylfurfural, 15, and d-xylose, 16, were studied in selected solvents. Trends in solubility have been assessed so that these data may be extrapolated to help predict solubilities of other related compounds. For example, 10, 11 and 15 all demonstrated appreciable solubility in scCO 2, as they possess weak intermolecular interactions. The dicarboxylic acids studied (4-9) all proved soluble in modified scCO2 (by use of MeOH as a cosolvent). While the polyols (12-14) and 1 were insoluble in scCO2 but water of various pHs and ionic liquids proved adept at their dissolution. Some of the amino acids studied (2 and 3) were only soluble in water with an adjustment of pH.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Synthetic Route of 7331-52-4. In my other articles, you can also check out more blogs about 7331-52-4

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

Synthetic Route of 7331-52-4, 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.7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, molecular formula is C4H6O3. In a article，once mentioned of 7331-52-4

A three-step supercritical CO2 extraction was used for selective fractionation of fast pyrolysis bio-oil. Oxygen-containing compounds in bio-oil and its fractions were characterized using infrared spectroscopy (IR), 1H nuclear magnetic resonance spectroscopy (NMR), gas chromatography-mass spectrometry (GC-MS) and negative-ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). With appropriate optimization of extraction parameters, lipids, hemicellulose, lignin and condensed aromatics were found enriched in three different fractions. The molecular composition and compound classes were identified by combined analytical techniques, and the selectivity of the fractionation was proved. The compound-type-specific fractionation also facilitated the following characterization and provided insights into the chemical composition of bio-oil. Results indicated that CO2 supercritical fluid extraction was potential for bio-oil preprocessing.

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 7331-52-4

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