Month: October 2022

Li, Xuepeng; Liu, Yanwei; Wang, YuanYuan; Wang, Jinxiang; Xu, Yongxia; Yi, Shumin; Zhu, Wenhui; Mi, Hongbo; Li, Tingting; Li, Jianrong published an article on January 31 ,2021. The article was titled 《Combined ultrasound and heat pretreatment improve the enzymatic hydrolysis of clam (Aloididae aloidi) and the flavor of hydrolysates》, and you may find the article in Innovative Food Science & Emerging Technologies.Safety of 3-Hydroxydihydrofuran-2(3H)-one The information in the text is summarized as follows:

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. In the experiment, the researchers used 3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9Safety of 3-Hydroxydihydrofuran-2(3H)-one)

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) is a 5-membered cyclic ester. It was obtained via tin-conversion of biomass-derived 1,3-dihydroxyacetone (DHA) and formaldehyde. And it may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis.Safety of 3-Hydroxydihydrofuran-2(3H)-one

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

Quality Control of 2,5-DimethoxytetrahydrofuranIn 2021 ,《Synthesis and Characterization of New S-substituted Sulfanylpyridines, 3-Aminothieno[2,3-b] Pyridines and 3-(1H-pyrrol-1-yl) Thieno[2,3-b] Pyridines and Related Heterocycles》 was published in Journal of Chemical and Pharmaceutical Research. The article was written by Bakhite, Etify. The article contains the following contents:

Reaction of Et (3-cyano-5-ethoxycarbonyl-6-methyl-4-styryl-2-pyridylsulfanyl)acetate with hydrazine hydrate gave a mixture of the corresponding (3-cyano-5-ethoxycarbonyl-6-methyl-4-styryl-2-pyridylsulfanyl)acetohydrazide and di-Et 3-amino-6-methyl-4-styrylthieno[2,3-b]pyridine-2,5-dicarboxylate. The latter compound was reacted with 2,5-dimethoxytetrahydrofuran to give 3-(1H-pyrrol-1-yl)thieno[2,3-b]pyridine. Partial hydrazinolysis resulted in the formation of 5-ethoxycarbonyl-6-methyl-3-(1H-pyrrol-1-yl)-4-styrylthieno[2,3-b]pyridine-2-carbohydrazide. The (3-cyano-5-ethoxycarbonyl-6-methyl-4-styryl-2-pyridylsulfanyl)acetohydrazide and 5-ethoxycarbonyl-6-methyl-3-(1H-pyrrol-1-yl)-4-styrylthieno[2,3-b]pyridine-2-carbohydrazide were used as precursors for the title compounds, e.g., I by subjecting them to some sequential reactions with different reagents. All new compounds were characterized on the basis of their elemental analyses and spectroscopic data. In the part of experimental materials, we found many familiar compounds, such as 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Quality Control of 2,5-Dimethoxytetrahydrofuran)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Quality Control of 2,5-Dimethoxytetrahydrofuran

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

SDS of cas: 19444-84-9On November 27, 2019 ,《Lignin Conversion Using Catalytic Ionic Liquids: Understanding the Role of Cations, Anions, and Hammett Acidity Functions》 appeared in Industrial & Engineering Chemistry Research. The author of the article were Singh, Sandip K.; Dhepe, Paresh L.. The article conveys some information:

Because it is undisputable that lignin depolymerization is a must to make the biorefinery concept economically feasible, several efforts are put toward it; however, a lot of catalyst designing is required to achieve efficient depolymerization activities. In this work, we show a systematic approach in the synthesis and characterization of ionic liquids (ILs) with varying combinations of cations (imidazole, benzimidazole, phosphonium, and ammonium) and anions (HSO4, PTS (p-toluenesulfonate), Cl, H2PO4, SnCl3, FeCl4, and CuCl3) for the depolymerization of lignin into low-mol. weight aromatic fractions (<220 g/mol) under mild reaction conditions (120 °C, 1 h, ambient pressure). In a methodical approach, effects of various reaction parameters such as temperature (70-170 °C), time (15-360 min), pressure (N2, 0.5-3 MPa), solvents and substrate, and so forth were studied to achieve best activity. Among all the catalysts, IL with the imidazolium cation and HSO4 as the anion showed best activity (78% yield). Subsequent to depolymerization, three aromatic monomers (5 wt % pure vanillin) were isolated using flash column chromatog. These aromatic monomers were characterized using gas chromatog. (GC), GC-mass spectrometry, and NMR techniques for their purity. Hammett acidity functions (H0) of ILs were measured using UV-vis photo-spectroscopy, and values are correlated with lignin depolymerization results. Lignin and tetrahydrofuran-soluble products were thoroughly characterized using assorted physicochem. techniques such as NMR (1H and 13C), gel permittivity chromatog., thermogravimetric anal., and so forth. The catalyst was recycled up to six runs and showed similar results in consecutive reactions. In the experimental materials used by the author, we found 3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9SDS of cas: 19444-84-9)

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis. It may be employed as starting reagent in the synthesis of enantiomerically pure orthogonally protected δ-azaproline, via Mitsunobu reaction.SDS of cas: 19444-84-9

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

Recommanded Product: 19444-84-9On October 31, 2020 ,《Advantages of using ohmic heating in Dulce de Leche manufacturing》 appeared in Innovative Food Science & Emerging Technologies. The author of the article were Silva, Ramon; Rocha, Ramon S.; Guimaraes, Jonas T.; Balthazar, Celso F.; Pimentel, Tatiana C.; Neto, Roberto P. C.; Tavares, Maria Ines B.; Esmerino, Erick A.; Duarte, Maria Carmela K. H.; Freitas, Monica Q.; Silva, Paulo Henrique F.; Cappato, Leandro P.; Raices, Renata S. L.; Silva, Marcia C.; Cruz, Adriano G.. The article conveys some information:

Ohmic heating (OH, 0, 2, 4, 6, 8, or 10 V cm-1, 72 °C/15 s, 60 Hz) at Dulce de leche processing was investigated. The equipment consisted in an ohmic heating chamber, and rectangular 316 stainless steel electrodes positioned 10 cm apart. OH-treated milk resulted in improvements in the quality parameters of Dulce de leche, with a decrease in energy expenditure (69.85-141.86 vs 1260 kJ) and hydroxymethylfurfural (HMF) levels (7.64-8.54 vs 9.53 μmol L-1), an increase in product homogeneity, and formation of volatile compounds important for the sweetness of Dulce de leche (butanoic acid and 2-furan methanol). In addition, the physicochem. composition, fatty acid profile, and health indexes (atherogenic, thrombogenic, desired fatty acids, and hypercholesterolemic saturated fatty acids) of the products remained without changes. In particular, the use of higher elec. field (> 6 V cm-1) led to a 14-78% decrease in process time, and improved volatiles profile. OH has proven to be a suitable technol. for milk treatment, resulting in improvements in the quality parameters of Dulce de leche with pos. impact at the process time and energy expenditure. The Dulce de Leche processing is characterized by long cooking times to acquire its typical characteristic color and flavor. Normally, it is used pasteurized milk as raw material. Ohmic heating decreased the total time of processing in Dulce de leche manufacturing, providing an economy at the in the energy costs without significant change at the quality parameters of the final product.3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9Recommanded Product: 19444-84-9) was used in this study.

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) is a 5-membered cyclic ester. It was obtained via tin-conversion of biomass-derived 1,3-dihydroxyacetone (DHA) and formaldehyde. And it may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis.Recommanded Product: 19444-84-9

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

Alvarez, Alejandro; Gutierrez, Alejandra; Ramirez, Cristina; Cuenca, Frank; Bolivar, German published an article on January 31 ,2022. The article was titled 《Aroma compounds produced by liquid fermentation with Saccharomyces cerevisiae and Zygosaccharomyces rouxii from castor oil through cell permeabilization》, and you may find the article in Biocatalysis and Agricultural Biotechnology.Formula: C4H6O3 The information in the text is summarized as follows:

The use of microorganisms to produce aroma mols. is growing in the flavor and fragrance industries due to the increased market for natural products. In this study, the effect of the type of microorganism, and cellular permeabilization on the production of aroma mols. from castor oil by liquid fermentation with yeasts, was assessed for possible application in the production of natural flavors. Different treatments were assessed with a three-way factorial design (type of microorganism, cell permeabilization and amount of castor oil), the aroma profile was analyzed using gas chromatog. with mass spectrometry (GC-MS), and the treatments were classified by principal component anal. (PCA). The results showed a significant effect of the yeast S. cerevisiae and Z. rouxii, the permeabilization treatment, and the amount of castor oil in the production of aroma compounds (p < 0.05). The mols. 4-hydroxy-2-pentenoic acid γ-lactone, Me pyruvate, 2,3,4-trimethyl-3-pentanol, and δ-decalactone were affected by all the factors. The production of metabolites increased with the permeabilization treatments for certain mols. like ethanol and organic acids, whereas the generation of others decreased. The use of these microorganisms and cell permeabilization are promising approaches for producing mols. with applications in natural flavors. In addition to this study using 3-Hydroxydihydrofuran-2(3H)-one, there are many other studies that have used 3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9Formula: C4H6O3) was used in this study.

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) is a 5-membered cyclic ester. It was obtained via tin-conversion of biomass-derived 1,3-dihydroxyacetone (DHA) and formaldehyde. And it may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis.Formula: C4H6O3

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

Hu, Fang-Peng; Zhang, Xue-Guo; Wang, Meng; Wang, He-Song; Huang, Guo-Sheng published an article in 2021. The article was titled 《Synthesis of oxazolidinones through ring-opening and annulation of vinylene carbonate with 2-pyrrolyl/indolylanilines under Rh(III) catalysis》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Computed Properties of C6H12O3 The information in the text is summarized as follows:

Herein, a rhodium-catalyzed C-H functionalization and subsequent intramol. ring-opening/cyclization of vinylene carbonate with o-aminophenyl pyrroles and indoles, e.g. I (R1 = H, 3-Me, 4-F, 5-MeO, etc.; R2 = H, 4-Me, 5-F, etc.), which leads to fused oxazolidinones, e.g. II, in moderate to good yields is reported. In this transformation, vinylene carbonate only eliminates one oxygen atom rather than -CO3 or CO2. Furthermore, some control experiments were conducted to elucidate the reaction mechanism. In the part of experimental materials, we found many familiar compounds, such as 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Computed Properties of C6H12O3)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Computed Properties of C6H12O3

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

Wang, Yinghao; Wang, Yongxing; Lu, Yaowei; Cao, Qiue; Fang, Wenhao published an article in 2021. The article was titled 《Efficient hydrogenation of 5-hydroxymethylfurfural using a synergistically bimetallic Ru-Ir/C catalyst》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Category: tetrahydrofurans The information in the text is summarized as follows:

Activated charcoal-dispersed Ru-Ir alloy nanoparticles (ca. 2.2 nm) are a selective and reusable hydrogenation catalyst for the conversion of 5-hydroxymethylfurfural to valuable liquid biofuel. A 99% yield to 2,5-dimethylfuran is achieved at only 120°C. An acceleration in the reduction of substrate and intermediates is observed due to the synergistic effect between the Ru and Ir species. In the experimental materials used by the author, we found 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Category: tetrahydrofurans)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Category: tetrahydrofurans

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

Fathalinejad, Samin; Taarning, Esben; Christensen, Peter; Christensen, Jan H. published an article in Journal of Analytical and Applied Pyrolysis. The title of the article was 《Chemical composition analysis of carbohydrate fragmentation products》.Quality Control of 3-Hydroxydihydrofuran-2(3H)-one The author mentioned the following in the article:

Fragmentation of simple sugars, using fluidized thermal bed cracking, results in a mixture that contains a variety of polar oxygenated compounds, some yet unknown to the industries. This lack of understanding of the product composition, hinders the downstream processes in conversion of sugars to useful chems. The aim of this study was fourfold: to develop a GC-MS identification workflow for carbohydrate fragmentation compounds, to build a library of compounds detected by five GC-MS methods including liquid injection, liquid-liquid extraction, static headspace, solid-phase microextraction and derivatization, to investigate and compare the compound coverage of the five methods, and finally investigate possible reaction pathways for some of the analytes in the mixture The anal. was done on a mixture of seven representative sugar fragmentation samples. The identification workflow was based on mass spectral match factors (>80%), retention indexes and anal. standards A total of 389 compounds were detected, out of which, 46 compounds were fully identified (through confirmatory anal. of anal. standards), 87 were tentatively identified (spectral match factors above 80%), 71 were un-identified with spectral match factors of below 80% and 185 were discarded (contaminants in blanks, etc.). The production pathway for some of the identified compounds in the sugar conversion mixtures were also discussed. In conclusion, solid-phase microextraction detected the highest number of analytes (93), mostly volatile organic compounds and the derivatization GC-MS technique detected the lowest number of analytes (19) but was the only method to detect the largest mols. (C6-C12) in size. This library of CF products can be used as a suspect-screening database for other biomass fragmentation mixtures3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9Quality Control of 3-Hydroxydihydrofuran-2(3H)-one) was used in this study.

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) is a 5-membered cyclic ester. It was obtained via tin-conversion of biomass-derived 1,3-dihydroxyacetone (DHA) and formaldehyde. And it may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis.Quality Control of 3-Hydroxydihydrofuran-2(3H)-one

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

Product Details of 19444-84-9On September 18, 2019 ,《Enantioconvergent Alkylations of Amines by Alkyl Electrophiles: Copper-Catalyzed Nucleophilic Substitutions of Racemic α-Halolactams by Indoles》 was published in Journal of the American Chemical Society. The article was written by Bartoszewicz, Agnieszka; Matier, Carson D.; Fu, Gregory C.. The article contains the following contents:

Transition-metal catalysis has the potential to address shortcomings in the classic SN2 reaction of an amine with an alkyl electrophile, both with respect to reactivity and to enantioselectivity. The authors describe the development of a user-friendly method (reaction at room temperature, with com. available catalyst components) for the enantioconvergent nucleophilic substitution of racemic secondary alkyl halides (α-iodolactams) by indoles. Mechanistic studies are consistent with the formation of a copper(I)-indolyl complex that reacts at different rates with the two enantiomers of the electrophile, which interconvert under the reaction conditions (dynamic kinetic resolution). This study complements earlier work on photoinduced enantioconvergent N-alkylation, supporting the premise that this important challenge can be addressed by a range of strategies. The experimental part of the paper was very detailed, including the reaction process of 3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9Product Details of 19444-84-9)

3-Hydroxydihydrofuran-2(3H)-one(cas: 19444-84-9) may be employed as starting reagent in the synthesis of series of seco-pseudonucleoside synthons via aminolysis. It may be employed as starting reagent in the synthesis of enantiomerically pure orthogonally protected δ-azaproline, via Mitsunobu reaction.Product Details of 19444-84-9

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

In 2019,Bulletin of the Chemical Society of Ethiopia included an article by Gullapelli, Kumaraswamy; Brahmeshwari, G.; Ravichander, M.. HPLC of Formula: 696-59-3. The article was titled 《A facile synthesis of 1-aryl pyrroles by Clauson-Kaas reaction using oxone as a catalyst under microwave irradiation》. The information in the text is summarized as follows:

A new and efficient methodol. to synthesize N-substituted pyrrole derivatives I (R = Ph, 4-chloro-2-nitrophenyl, benzenesulfonyl, etc.) by Clauson-Kaas reaction employing oxone as catalyst was developed. The transformation was performed in acetonitrile under microwave irradiation This procedure has several advantages such as high yield, clean product formation, and short reaction time.2,5-Dimethoxytetrahydrofuran(cas: 696-59-3HPLC of Formula: 696-59-3) was used in this study.

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. When aromatic ethers are exposed to halogen in the presence or absence of a catalyst, they undergo halogenation, such as bromination.HPLC of Formula: 696-59-3

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