Category: Tetrahydrofurans

Li, Yuanyi published the artcileIdentification, quantitation and sensorial contribution of lactones in brandies between China and France, Name: 3-Hydroxydihydrofuran-2(3H)-one, the publication is Food Chemistry (2021), 129761, database is CAplus and MEDLINE.

Lactones are important flavor compounds in lots of foodstuffs. They also play an important role in brandy, but have not been studied at large. In this study, solid-phase extraction (SPE) and stir bar sorptive extraction (SBSE) combined with comprehensive two-dimensional gas chromatog. and time-of-flight mass spectrometry (GC x GC-TOFMS) were applied to identify and quantify lactones in brandies between China and France. Totally 17 lactones were identified, four of which were detected only in SBSE. Among them, γ-valerolactone, γ-heptalactone, δ-octalactone, γ-undecanolactone and δ-dodecalactone were detected in brandy for the first time. The results of partial least squares-discriminant anal. (PLS-DA) revealed that lactones distinguished regional characteristics among different brandies. The omission test showed that four lactones (OAV > 1) had direct impact on the aroma of brandy, and other seven lactones at sub-threshold (0.1 < OAV < 1) provided peach and apricot aroma characteristics through synergistic effects.

Food Chemistry published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Name: 3-Hydroxydihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Remon, Javier published the artcileToward Renewable-Based, Food-Applicable Prebiotics from Biomass: A One-Step, Additive-Free, Microwave-Assisted Hydrothermal Process for the Production of High Purity Xylo-oligosaccharides from Beech Wood Hemicellulose, Synthetic Route of 19444-84-9, the publication is ACS Sustainable Chemistry & Engineering (2019), 7(19), 16160-16172, database is CAplus.

Xylooligosaccharides (XOS) produced from biomass offer a plethora of excellent physicochem. and physiol. properties to be used as natural prebiotic nutraceuticals. Herein, this work first addresses and optimizes a novel one-pot, additive-free, microwave-assisted process to produce high purity XOS from beech wood hemicellulose, studying the influence of the temperature, reaction time, and solid loading. These variables exerted a significant influence, allowing the transformation of hemicellulose into a gas (0-19%), an XOS-rich liquid product (9-80%) and a spent solid material (17-90%). The liquid phase consisted of a mixture of XOS with a d.p. (DP) DP > 6 (75-100 C-weight %) and DP 3-6 (0-10 C-weight %), together with mono/disaccharides (0-1 C-weight %), carboxylic acids (0-5 C-weight %), ketones (0-12 C-weight %) and furans (0-12 C-weight %). A good compromise between the liquid yield (81%) and XOS purity (96 C-weight %) was achieved at 172 °C using a solid loading of 5 weight % for 47 min. This time could be reduced (33 min) and the solid loading increased (25 weight %) without substantially altering the XOS (98 C-weight %) purity, although the liquid yield was reduced. The liquid yield could be increased up to 97% at the expenses of XOS purity (90 C-weight %) at 177 °C using a 5 weight % solid loading for 60 min. For these optima, the microwave production costs shifted between 1.42 and 6.50 euro/kg XOS, which is substantially lower than the XOS market price, thus highlighting the high potential of this emerging technol. Novel microwave-assisted hydrothermal process assessed and optimized for the production of food-applicable prebiotic nutraceuticals from beech wood hemicellulose.

ACS Sustainable Chemistry & Engineering published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Synthetic Route of 19444-84-9.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Wu, Haijun published the artcilePromoting the conversion of poplar to bio-oil based on the synergistic effect of alkaline hydrogen peroxide, Computed Properties of 19444-84-9, the publication is Renewable Energy (2022), 107-117, database is CAplus.

The synergistic catalysis effect of NaOH and H₂O₂ on the hydrothermal liquefaction (HTL) of poplar was investigated and compared to the NaOH or H₂O₂ catalyzed HTL at different temperatures and 30 min residence time. GC-MS, GPC, FT-IR, HPLC and TGA were used to comprehensively characterize the phys. and chem. properties of liquefied products (bio-oil, lignin and solid residue). The results showed that the highest total bio-oil yield (70.65%) was obtained at 280°C with NaOH (35 g/L)/H₂O₂ (30 g/L) as catalysts. The average mol. weight and polydispersity index (PDI) were found to be lower compared to that from other conditions. As the NaOH concentration was increased, the bio-oil yield was improved. The concentration of H₂O₂ for the optimal synergistic effect was observed to be 30 g/L. GC-MS anal. showed that the bio-oil obtained by NaOH (35 g/L)/H₂O₂ (30 g/L) was characterized with the lowest N content. The synergistic effect promoted the higher production selectivity of o-xylene and p-xylene in the bio-oil.

Renewable Energy published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C7H11N, Computed Properties of 19444-84-9.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Li, Qingyin published the artcileCo-hydrothermal carbonization of swine manure and cellulose: Influence of mutual interaction of intermediates on properties of the products, Application of 3-Hydroxydihydrofuran-2(3H)-one, the publication is Science of the Total Environment (2021), 148134, database is CAplus and MEDLINE.

Co-hydrothermal carbonization (HTC) of livestock manure and biomass might improve the fuel properties of the hydrochar due to the high reactivity of the biomass-derived intermediates with the abundant oxygen-containing functionalities. However, the complicated compositions make it difficult to explicit the specific roles of the individual components of biomass played in the co-HTC process. In this study, cellulose was used for co-HTC with swine manure to investigate the influence on the properties of the hydrochar. The yield of hydrochar obtained from co-HTC reduced gradually with the cellulose proportion increased, and the solid yield was lower than the theor. value. This was because the cellulose-derived intermediates favored the stability of the fragments from hydrolysis of swine manure. The increased temperature resulted in the reduction of the hydrochar yield whereas the prolonged time enhanced the formation of solid product. The interaction of the co-HTC intermediates facilitated the formation of O-containing species, thus making the solid more oxygen- and hydrogen-rich with a higher volatility. In addition, the co-HTC affected the evolution of functionalities like -OH and C=O during the thermal treatment of the hydrochar and altered its morphol. by stuffing the pores from swine manure-derived solid with the microspheres from HTC of cellulose. The interaction of the varied intermediates also impacted the formation of amines, ketones, carboxylic acids, esters, aromatics and the polymeric products in distinct ways.

Science of the Total Environment published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Application of 3-Hydroxydihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Zhou, Zhilei published the artcileElucidation of the aroma compositions of Zhenjiang aromatic vinegar using comprehensive two dimensional gas chromatography coupled to time-of-flight mass spectrometry and gas chromatography-olfactometry, Synthetic Route of 19444-84-9, the publication is Journal of Chromatography A (2017), 218-226, database is CAplus and MEDLINE.

In this work, a method to characterize the aroma compounds of Zhenjiang aromatic vinegar (ZAV) was developed using comprehensive two dimensional gas chromatog. (GC × GC) coupled with time-of-flight mass spectrometry (TOFMS) and gas chromatog. olfactometry (GC-O). The column combination was optimized and good separation was achieved. Structured chromatograms of furans and pyrazines were obtained and discussed. A total of 360 compounds were tentatively identified based on mass spectrum match factors, structured chromatogram and linear retention indexes comparison. The most abundant class in number was ketones. A large number of esters, furans and derivatives, aldehydes and alcs. were also detected. The odor-active components were identified by comparison of the reported odor of the identified compounds with the odor of corresponding GC-O region. The odorants of methanethiol, 2-methyl-propanal, 2-methyl-butanal/3-methyl-butanal, octanal, 1-octen-3-one, di-Me trisulfide, trimethyl-pyrazine, acetic acid, 3-(methylthio)-propanal, furfural, benzeneacetaldehyde, 3-methyl-butanoic acid/2-methyl-butanoic acid and phenethyl acetate were suspected to be the most potent. About half of them were identified as significant aroma constituents in ZAV for the first time. Their contribution to specific sensory attribute of ZAJ was also studied. The results indicated that the presented method is suitable for characterization of ZAV aroma constituents. This study also enriches our knowledge on the components and aroma of ZAV.

Journal of Chromatography A published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C22H18O2, Synthetic Route of 19444-84-9.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Li, Xuepeng published the artcileCombined ultrasound and heat pretreatment improve the enzymatic hydrolysis of clam (Aloididae aloidi) and the flavor of hydrolysates, Category: tetrahydrofurans, the publication is Innovative Food Science & Emerging Technologies (2021), 102596, database is CAplus.

The effects of pretreatments with ultrasound (UP), heat (HP), and combinations of heat-ultrasound (HP-UP) and ultrasound-heat (UP-HP) on the flesh enzymolysis of clam (Aloididae aloidi) and the flavor characteristics of hydrolyzates were investigated. The optimum UP pretreatment conditions for the hydrolysis were obtained at ultrasound power of 500 W, ultrasound time of 20 min, and liquid/solid (L/S) ratio of 2:1 (v/w), yielded 41.33% of hydrolysis degree (DH). Among the different pretreatments, the UP pretreatment had the highest DH value, while the HP-UP pretreatment obtained the highest soluble peptide content. The UP pretreatment efficiently enhanced the contents of taste-active components, including free amino acids, 5′-nucleotides, and succinic acid. The HP pretreatment promoted the formation of pleasant volatile compounds and reduced the content of unpleasant volatile compounds, such as 1-octen-3-ol and 2-ethyl-1-hexanol. The combined HP-UP pretreatment was an effective method for improving the enzymic hydrolysis of clam and the flavor of hydrolyzate.

Innovative Food Science & Emerging Technologies published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Bharali, Pankaj published the artcilePhytochemical and biochemical study of four legume plants with detergent and anti-lice properties from the Eastern Himalayan region of India, Quality Control of 19444-84-9, the publication is Current Science (2017), 113(7), 1434-1439, database is CAplus.

This study is aimed at the qual. and quant. investigation of the phytochem. content, macroand micronutrients, proximate anal. and determination of antioxidant activities of four plants belonging to the family Leguminosae namely Acacia pennata, Albizia lucidior, Albizia chinensis and Gymnocladus assamicus widely used by the Adi tribe of Arunachal Pradesh for their surfactant and insect-repellent properties. The methanol extract of the seed pod of G. assamicus, the most popular soap-plant among the Adi people, showed maximum 1,1-diphenyl-2-picrylhydrazyl scavenging activity with EC50 of 13.50 μg/mL and presence of hitherto reported insecticidal metabolites like 2-hydroxy-gamma-butyrolactone and heptadecene-(8)-carbonic acid.

Current Science published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Quality Control of 19444-84-9.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Liang, Jian-lan published the artcileChanges of aroma components in ‘Yanlong’ chestnut during storage, Category: tetrahydrofurans, the publication is Guoshu Xuebao (2014), 31(3), 410-414, database is CAplus.

This article was to study the changes of aroma components in ‘Yanlong’ chestnut during storage. The aroma components in chestnut stored 30 days, 90 days and 150 days, resp., were collected using solvent extraction, and analyzed by gas chromatograph-mass spectrophotometer (GC-MS). Totally 27 compounds were identified. Esters, ketones, aldehydes and alcs. were the major constituents. The aroma components accumulated differently during the storage. There were 17 components identified after storage for 30 days, 22 after 90 days and 22 after 150 days. During storage, the contents of esters and alkenes increased, and the contents of ketones and acids raised within 90 days and then kept stable, while the contents of alcs. showed highest after stored for 30 days and decreased until 90 days, then changed a little. Butyrolactone, 2-hydroxy-gamma-butyrolactone, 2,5-dimethyl-4-hy-droxy-3 (2H)-furanone, 4H-pyran-4-one, 2,3-dihydro-3,5-dihydroxy-6-methyl-, furfural and 5-(hydroxymethyl)-2-Furancarboxaldehyde might be the characteristic aroma constituents of ‘Yanlong’ chestnut. Under the certain storage condition, the best time for tasting chestnut food was within 90 days after storage.

Guoshu Xuebao published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Karpeisky, Alexander published the artcile2′-O-Methylthiomethyl modifications in hammerhead ribozymes, Synthetic Route of 87865-78-9, the publication is Nucleosides & Nucleotides (1997), 16(7-9), 955-958, database is CAplus.

The synthesis of all four phosphoramidites of 2′-O-methylthiomethyl ribonucleosides and their incorporation into hammerhead ribozymes and influence on nuclease stability and catalytic activity is described.

Nucleosides & Nucleotides published new progress about 87865-78-9. 87865-78-9 belongs to tetrahydrofurans, auxiliary class Nucleosides and Nucleotides,Nucleoside Analogues, name is N-(9-((6aR,8R,9R,9aS)-9-Hydroxy-2,2,4,4-tetraisopropyltetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-8-yl)-6-oxo-6,9-dihydro-1H-purin-2-yl)isobutyramide, and the molecular formula is C26H45N5O7Si2, Synthetic Route of 87865-78-9.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Beijer, Barbro published the artcileSimplified and cost effective syntheses of fully protected phosphoramidite monomers suitable for the assembly of oligo(2′-O-allylribonucleotides), Category: tetrahydrofurans, the publication is Nucleosides & Nucleotides (1994), 13(9), 1905-27, database is CAplus.

Simplified, high yielding syntheses of suitably protected 2′-O-allylribonucleoside-3′-O-phosphoramidites starting from standard ribonucleosides have been elucidated. Specific 2′-O-allylation is readily achieved using amidine protection of the exocyclic amino groups of adenosine and cytidine and in the case of guanosine the allylation is carried out on an easily prepared intermediate bearing transient protection of the lactam function.

Nucleosides & Nucleotides published new progress about 87865-78-9. 87865-78-9 belongs to tetrahydrofurans, auxiliary class Nucleosides and Nucleotides,Nucleoside Analogues, name is N-(9-((6aR,8R,9R,9aS)-9-Hydroxy-2,2,4,4-tetraisopropyltetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-8-yl)-6-oxo-6,9-dihydro-1H-purin-2-yl)isobutyramide, and the molecular formula is C26H45N5O7Si2, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem