Tag: M.W=100-150

Kawamata, Yuki published the artcileUniqueness of biphasic organosolv treatment of soft- and hardwood using water/1-butanol co-solvent, Category: tetrahydrofurans, the publication is Industrial Crops and Products (2021), 113078, database is CAplus.

Biphasic organosolv treatment for soft- and hardwood using water/1-butanol was unique based on the correlation between liquid-phase states and solubility of the co-solvents when compared with a monophasic water/ethanol system. First, Pro II process simulator showed that water/1-butanol exhibited a biphasic system in the range of 1.6-19.0 mol/mol at a treatment temperature of 473 K. In addition, solubility of the co-solvents was evaluated using the Hildebrand solubility parameter (δ), which indicated that the biphasic system could simultaneously provide 28.5 and 42.0 MPa^1/2 for the 1-butanol and water phase, resp. Each δ value appeared appropriate for lignin and hemicellulose dissolution because they were similar to those reported for lignin and a typical sugar. While hemicellulose could be removed by increasing water content in an organosolv of Japanese cedar sawdust, high lignin removal was achieved only under biphasic conditions. Carbon yield of each fraction (solid, 1-butanol-, and water-soluble fraction) and Py-GC/MS anal. revealed that lignin and hemicellulose could be recovered in the 1-butanol and water fractions, resp. The organosolv using Japanese cedar and willow was compared to the results when using monophasic water/ethanol. The results indicated that the co-solvent could not efficiently remove hemicellulose and lignin simultaneously because the monophasic system did not produce the level of solubility needed under the same conditions. In contrast, the biphasic water/1-butanol system achieved greater removal of hemicellulose and lignin compared to water/ethanol. The biphasic system was also applicable to separation of an industrial agricultural waste; sugarcane bagasse. Finally, the 2D-NMR spectra of 1-butanol-soluble lignin showed a trace amount of β-O-4 linkages in the lignin, indicating β-O-4 was cleaved via hydrolysis in the water phase during biphasic treatment.

Industrial Crops and Products 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

Xiao, Qian published the artcileDirecting-Group-Assisted Markovnikov-Selective Hydrothiolation of Styrenes with Thiols by Photoredox/Cobalt Catalysis, Safety of 2-Methyl-3-tetrahydrofuranthiol, the publication is Organic Letters (2021), 23(9), 3604-3609, database is CAplus and MEDLINE.

In contrast with the well-developed radical thiol-ene reaction to access anti-Markovnikov-type products, the research on the catalytic Markovnikov-selective hydrothiolation of alkenes is very restricted. Because of the catalyst poisoning of metal catalysts by organosulfur compounds, limited examples of transition-metal-catalyzed thiol-ene reactions have been reported. However, in this work, a directing-group-assisted hydrothiolation of styrenes with thiols by photoredox/cobalt catalysis is found to proceed smoothly to afford Markovnikov-type sulfides with excellent regioselectivity.

Organic Letters published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C8H10S, Safety of 2-Methyl-3-tetrahydrofuranthiol.

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

Chen, Hai-tao published the artcileBlending of Yueshengzhai spiced beef-like liquid flavor, Recommanded Product: 2-Methyl-3-tetrahydrofuranthiol, the publication is Beijing Gongshang Daxue Xuebao, Ziran Kexueban (2011), 29(4), 24-27, database is CAplus.

The previous anal. of volatile flavor compounds of spiced beef was reviewed. The commonly used spices for beef flavor were listed, and the liquid essence formula of Yueshengzhai spiced beef consisted of 36 flavor compounds was given based on the laboratory results.

Beijing Gongshang Daxue Xuebao, Ziran Kexueban published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C5H10OS, Recommanded Product: 2-Methyl-3-tetrahydrofuranthiol.

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

Li, Qingyin published the artcileCo-hydrothermal carbonization of swine and chicken manure: Influence of cross-interaction on hydrochar and liquid characteristics, Quality Control of 19444-84-9, the publication is Science of the Total Environment (2021), 147381, database is CAplus and MEDLINE.

Swine and chicken manures are abundant solid wastes that can be converted into carbonaceous materials through hydrothermal carbonization (HTC). Owing to their unique biochem. compositions, co-HTC of these two types of manures may have significant implications for the generated products. We investigated the co-HTC of swine manure and chicken manure to understand the influence of the interaction between contrasting manures on the properties of the derived products. The results indicated that co-HTC treatment enhanced the formation of solid product and improved the C and N contents, heating value, and energy yield of the resulting hydrochar. Regarding the ignition temperature and comprehensive combustion index, the combustion properties of the hydrochar were enhanced owing to the mutual effect of the HTC intermediates. Addnl., the interaction of the intermediates significantly impacted the transfer of nitrogenous species and generation of organic acids and organic polymers with fused-ring structures. Therefore, co-HTC processing of animal manures could potentially provide a sustainable pathway for the conversion of animal waste into solid products with improved characteristics compared to those produced by treating the two feedstocks sep.

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, Quality Control of 19444-84-9.

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

Ding, Kunshan published the artcileEasily encodable/decodable digital polymers linked by dithiosuccinimide motif, Synthetic Route of 57124-87-5, the publication is European Polymer Journal (2019), 421-425, database is CAplus.

Digital polymers with precise arrangements of units acting as the 0- or 1-bit, have shown bright promise for the data storage media. The easiness of encoding and decoding these polymers is essential when putting them into practical applications. Herein, the concept of utilizing sequence building block and sequencing indicator to generate easily encodable and decodable digital polymers is proposed. With the thiol-maleimide Michael coupling for digital chain growth, the dithiosuccinimide (DTS) motifs generated from the succinimide thioether linkages are used as the sequence building block. The DTS can be equipped with different groups, thus greatly enabling the modular encoding process. Importantly, the tandem mass spectrometry (MS/MS) results unveil the relatively abundant DTS-induced MS signal, which facilitates the decoding process with DTS acting as the sequencing indicator. The synergetic MS/MS induced cleavages of the two C-S bonds on DTS are responsible for the relatively abundant MS signal. Finally, the work exemplifies the quant. decoding of a digital polymer with DTS as the sequence building block and sequencing indicator. This study demonstrates the concept of sequence building block and sequencing indicator, which advances the digital polymers for practical applications.

European Polymer Journal published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C5H10OS, Synthetic Route of 57124-87-5.

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

Kang, Wenyue published the artcileSelective production of acetic acid via catalytic fast pyrolysis of hexoses over potassium salts, Formula: C4H6O3, the publication is Catalysts (2020), 10(5), 502, database is CAplus.

Glucose and fructose are widely available and renewable resources. They were used to prepare acetic acid (AA) under the catalysis of potassium acetate (KAc) by thermogravimetric anal. and pyrolysis coupled with gas chromatog. and mass spectrometry. The TGA result showed that the KAc addition lowered the glucose’s thermal decomposition temperatures (about 30°C for initial decomposition temperature and 40°C for maximum mass loss rate temperature), implying its promotion of glucose’s decomposition The Py-GC/MS tests illustrated that the KAc addition significantly altered the composition and distribution of hexose pyrolysis products. The maximum yield of AA was 52.1% for the in situ catalytic pyrolysis of glucose/KAc (1:0.25 wt/wt) mixtures at 350°C for 30 s. Under the same conditions, the AA yield obtained from fructose was 48% and it increased with the increasing amount of KAc. When the ratio reached to 1:1, the yield was 53.6%. In comparison, a study of in situ and online catalytic methods showed that KAc can not only catalyze the primary cracking of glucose, but also catalyze the cracking of a secondary pyrolysis stream. KAc plays roles in both phys. heat transfer and chem. catalysis.

Catalysts 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, Formula: C4H6O3.

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

Li, Zhanchao published the artcileCharacterization of Five Kinds of Wood Vinegar Obtained from Agricultural and Forestry Wastes and Identification of Major Antioxidants in Wood Vinegar, Product Details of C4H6O3, the publication is Chemical Research in Chinese Universities (2019), 35(1), 12-20, database is CAplus.

Wood vinegar(WV) has a powerful antioxidant activity, but it is unclear which components are responsi-ble for the antioxidant activity. In the present study, the double-column retention index qual. method was used for the identification of the major components in five kinds of WV. And the major antioxidants of wood vinegar were accurately identified with the aid of Pearson product-moment correlation coefficients and authentic standard samples. Our results demonstrate that phenolic compounds are mainly responsible for the powerful antioxidant activity. 2,6-Dimethoxyphenol is the most powerful antioxidant in WV. 2-Methoxyphenol and 3-methyl-1,2-cyclopentane-dione also have an important influence on the antioxidant activity of WV. Our results suggest that the contents of 2-methoxyphenol, 2,6-dimethoxyphenol and 3-methyl-1,2-cyclopentanedione should act as the criteria for evaluating the antioxidant activity of WV. Our work will provide useful information for WV’s application in the fields of food and medicine as antioxidants.

Chemical Research in Chinese Universities 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, Product Details of C4H6O3.

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

Li, Zhanchao published the artcilePreparation and characterization of two wood vinegars obtained from hull of spina date seed and shell of peanut, Recommanded Product: 3-Hydroxydihydrofuran-2(3H)-one, the publication is Chemical Research in Chinese Universities (2017), 33(3), 348-353, database is CAplus.

Two new kind of wood vinegars(WVs) from the hull of spina date seed(HSDS) and the shell of peanut(PS) were prepared 32 Major components in the two kind of WVs were identified and determined by gas chromato-graph-mass spectrometery. The total phenolic content was determined and the antioxidant activity of the WV was measured. The total phenolic contents of PSWV and HSDSWV were 75.9 and 98.1 mg/L, resp., when they were expressed as catechol equivalent In 1,1-diphenyl-2-picrylhydrazyl assay, free radical scavenging activity of HSDSWV was also superior than that of PSWV. In addition, the antioxidant activities of the two kind of WVs exhi-bited a good pos. correlation with total phenolic content, and the linear correlation coefficients ranged from 0.9594 to 0.9970. The two kind of WVs could be used in the fields of food and medicine due to their powerful anti-oxidant activities.

Chemical Research in Chinese Universities 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, Recommanded Product: 3-Hydroxydihydrofuran-2(3H)-one.

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

Guan, Yinshuang published the artcileDepolymerization of alkaline lignin over mesoporous KF/γ-Al₂O₃, COA of Formula: C4H6O3, the publication is New Journal of Chemistry (2020), 44(34), 14411-14420, database is CAplus.

As a kind of biomass resource, lignin is the only natural renewable resource that can provide abundant aromatic compounds, which is undoubtedly considered as the best candidate to produce value-added chems. by lignin depolymerization Thus, it is of great significance to develop approaches that are able to accommodate the complex structure of lignin. Herein, an efficient depolymerization method is implemented in methanol using a mesoporous solid superbase KF/γ-Al₂O₃ catalyst. Research shows that the depolymerization of lignin is not obvious below the critical temperature of methanol, and the conversion of lignin increases significantly above the critical temperature, which can reach 60.6% at 270°C. Phenols and methoxy-substituted monocyclic aromatic compounds are predominant in the liquid products acquired by gas chromatog./mass spectrometry. Furthermore, oligomers were analyzed by time-of-flight mass spectrometry equipped with electrospray ionization. It is found that the mol. mass of the oligomers varied between 200 and 600 Da, the degree of unsaturation is mainly 4 and 8 with 1-2 aromatic rings, and the carbon number is found to be within the range of 15-30. It is speculated that the oligomers are mainly monophenyl or biphenyl compounds containing branched chains.

New Journal of 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, COA of Formula: C4H6O3.

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

Han, Jie published the artcileEffects of different storage conditions on volatile substance changes and quality of Thompson seedless grape, HPLC of Formula: 19444-84-9, the publication is Shipin Yu Fajiao Gongye (2015), 41(9), 181-187, database is CAplus.

Volatile substance of Thompson seedless grape with 3 kinds of different preservatives and combinations during 0-1°C storage was compared and analyzed by GS-MS, and its soluble solids, total acid, attachment of stem and hardness were compared. The results showed that Thompson seedless grape was packed into 3.5 kg (5 package of CT2 preservative and 1 package of CT5 preservative) had the best preserving effect. Volatile substance of Thompson seedless grape was mainly composed of aldehydes, alc. and esters, and their contents in the control group were greater than those in other treated groups. Aldehydes in T2 treated group was higher than those in other treated groups. After 60 days of storage, soluble solids, total acid, attachment of stem, and hardness were 17.64%, 0.80%, 2.59 N, 17.16% and 2.79 N. SO₂ had relatively little effect on volatile substance. T2 treatment had the best preserving effect on Thompson seedless.

Shipin Yu Fajiao Gongye 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, HPLC of Formula: 19444-84-9.

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