Tag: M.W=150-200

Chen, Feng published the artcilePhotoredox-Catalyzed Addition of Dibromofluoromethane to Alkenes: Direct Synthesis of 1-Bromo-1-fluoroalkanes, COA of Formula: C12H14O2, the publication is Organic Letters (2021), 23(6), 2364-2369, database is CAplus and MEDLINE.

Reported herein is a direct and efficient route to 1-bromo-1-fluoroalkanes through the reaction of unactivated alkenes with dibromofluoromethane under photoredox catalysis. The key to the success of these addition reactions is the employment of a suitable photoredox catalyst. In particular, hydro- and bromo-bromofluoromethylated products were chemoselectively formed using THF and DMF/H₂O as solvents, resp. Furthermore, the synthetic application of the prepared 1-bromo-1-fluoroalkanes has been demonstrated by their transformation into a variety of fluorine-containing compounds

Organic Letters published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, COA of Formula: C12H14O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Lige published the artcileWeighted gene co-expression network analysis revealed the synthesis of aromatic compounds in Dendrobium catenatum, Product Details of C10H10O2, the publication is Industrial Crops and Products (2022), 114668, database is CAplus.

Aromatic compounds in Dendrobium catenatum could affect brewing quality. Me jasmonate (MeJA) treatment enhances the content of aromatic compounds in D. catenatum, improving the wine quality in brewing industry and medicinal value. In this study, two D. catenatum genotypes, A6 and B1, were used to investigate the effect of MeJA treatment on aromatic compounds A total of 52 aromatic metabolites were identified using metabolome technique. Based on RNA-seq, weighted gene co-expression network anal. (WGCNA) of 16, 841 highly expressed transcripts uncovered black, cyan and turquoise modules that are significantly associated with the variation of aromatic compounds These results reveal the changes of aromatic metabolites during MeJA treatment and provide insight into the biosynthesis mechanism of aromatic compounds in D. catenatum, which could be conducive to the synthesis of active bioactive compounds and their use as industrial byproducts.

Industrial Crops and Products published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Product Details of C10H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Qingyu published the artcileAmphiphilic indoles as efficient phase-transfer green catalysts for bromination in water, COA of Formula: C10H10O2, the publication is ChemSusChem (2022), 15(12), e202200574, database is CAplus and MEDLINE.

Brominated compounds are important, but they are usually prepared in organic solvents. Here, efficient amphiphilic indole-based phase-transfer organocatalysts were developed for environmentally benign bromination reactions in water. As test reactions, hydroxybromination of olefins and aromatic bromination could be conducted in a greener and more sustainable manner compared with methods using organic solvents, producing the corresponding bromides in good yields. Some pure products could be obtained without column chromatog.

ChemSusChem published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C12H16N2O2, COA of Formula: C10H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lu, Deli published the artcileBiomass-derived dibasic acids to diesters with inorganic ligand-supported catalyst: synthesis, optimization, characterization, Formula: C8H14O4, the publication is Research on Chemical Intermediates (2022), 48(1), 321-337, database is CAplus.

Several attempts have been made to obtain aliphatic dicarboxylic diesters from esterification reaction to develop the biomass-derived platform mols. and green manufacturing processes. In this paper, Na₃(H₂O)₆[AlMo₆O₁₈(OH)₆], an Anderson-type polyoxometalate, firstly, was reported as a catalyst for diester synthesis from dicarboxylic acid to diester which showed an well productivity and selectivity characterized by ¹H and ¹³C. Response surface methodol. (RSM) integrated with the desirability function approach was used to determine the best operative conditions, and the optimal reaction parameters for maximum di-Pr succinate yield (77 ± 2.5%) were identified as 1.19 mol.% catalyst loading, 4.9:1 propanol/succinic acid ratio, 113°C, and 9.6 h. Three batches of tests were carried for catalyst recycling with 78-75% yield even after 6 cycles of esterification. In addition, the substrate carbon chain was increased for investigation of substrate scope achieving satisfactory results and all products were characterized by ¹H and ¹³C NMR spectroscopy.

Research on Chemical Intermediates published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Xiao, Yu published the artcileMetabolite profiling, antioxidant and α-glucosidase inhibitory activities of buckwheat processed by solid-state fermentation with Eurotium cristatum YL-1, Name: Methyl 3-phenyl-2-propenoate, the publication is Food Research International (2021), 110262, database is CAplus and MEDLINE.

Buckwheat was processed by solid-state fermentation (SSF) with the probiotic fungal strain Eurotium cristatum YL-1. The effects of SSF on the phytochem. content, as well as the antioxidant and α-glucosidase inhibitory activities, on buckwheat were revealed. Metabolite differences between non-fermented buckwheat (BW) and E. cristatum fermented buckwheat (FBW) were investigated by LC-MS/MS-based untargeted metabolomics. Results showed that 103 and 68 metabolites remarkably differed between BW and FBW in pos. and neg. ionization modes, resp. Most phenolic compounds and alkaloids were significantly up-regulated during SSF. Hydrolytic enzymes (i.e., β-glucosidase, α-amylase, protease, and cellulase) were produced by the filamentous fungus E. cristatum during SSF. In vitro spectrophotometric assays demonstrated that the total phenolics content, ferric reducing antioxidant power, reducing power, scavenging activities of DPPH radical and ABTS·+, and α-glucosidase inhibitory activity of buckwheat were considerably enhanced after processing by SSF with E. cristatum. Addnl., solvents with different polarities significantly influenced the antioxidant and α-glucosidase inhibitory activities of buckwheat extracts Our study indicated that processing by SSF with E. cristatum can greatly improve the phytochem. components of buckwheat and consequently contribute to its antioxidant and α-glucosidase inhibitory activities. SSF with E. cristatum is an innovative method for enhancing the health-promoting components and bioactivities of buckwheat.

Food Research International published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C12H17BO4S, Name: Methyl 3-phenyl-2-propenoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Xiaonan published the artcileCloning and expression of Lactobacillus brevis β-glucosidase and its effect on the aroma of strawberry wine, Computed Properties of 103-26-4, the publication is Journal of Food Processing and Preservation (2022), 46(3), e16368, database is CAplus.

The aim of this study was to evaluate the effect of β-glucosidase (Lb0241) derived from Lactobacillus brevis on the aroma of strawberry wine. The recombinant Lb0241 was cloned and expressed in Escherichia coli BL21 (DE3). The effect of temperature, pH, and additives on the activity of Lb0241 and its substrate specificity and kinetic parameters were analyzed. Furthermore, the effects of Lb0241 on the aroma properties of strawberry wine were evaluated by SPME-GC-MS and sensory evaluation. Lb0241 showed remarkable specificity for β-glucoside and displayed the highest activity at pH 5.0 and 30°C, with a relative activity of 55% in 12% ethanol. Ni2+ and K+ could increase the activity of Lb0241, but Fe2+, urea, 2-hydroxy-1-ethanethiol, and sodium dodecyl sulfate showed the opposite effect. Lb0241 could increase the aroma-active volatiles of esters, terpenoids, and phenols, and decrease alcs. and volatile acids. Overall, Lb0241 showed promising prospects in terms of aroma release in strawberry wine. Practical applications : A notable part of non-volatile glycosidic precursors present in fruit wine constitutes a reserve of potential aroma-active mols. Thus, the hydrolysis of aromatic precursors could significantly enhance the aroma of fruit wine. Our results showed that the new β-glucosidase Lb0241, which was derived from Lactobacillus brevis T61, exhibited strong acid and ethanol resistance. Moreover, Lb0241 could effectively hydrolyze aromatic precursors and enhance the level of aroma compounds in strawberry wine. Therefore, Lb0241 has potential application prospects and economic value to improve the flavor of fruit wine.

Journal of Food Processing and Preservation published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Computed Properties of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ye, Shuxian published the artcileNonisocyanate CO₂-Based Poly(ester-co-urethane)s with Tunable Performances: A Potential Alternative to Improve the Biodegradability of PBAT, Safety of Dimethyl adipate, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(4), 1923-1932, database is CAplus.

The objective of this study is to develop a nonisocyanate route to prepare a biodegradable CO₂-based poly(ester-co-urethane) (PEU), which has some improved performances when compared with com. poly(butylene adipate-co-terephthalate) (PBAT). These performances include mech. properties, biodegradability, and melt processability. Specifically, five bis-alkylcarbamates were synthesized from diamines, methanol, and CO₂. Subsequently, 1,4-butanediol (BDO) and di-Me terephthalate (DMT) reacted with five kinds of CO₂-based bis-alkylcarbamates to study the influence of methylene group number on the performances of PEUs. Moreover, the effect of various ratios of aromatic to aliphatic blocks in PEUs on their properties was systematically investigated. Addnl., the hydrolytic stability of synthesized PEUs was evaluated upon the degradation percentage in phosphate-buffered saline. The semicrystalline PEUs with tunable properties exhibit an initial thermal decomposition temperature of over 273.7°C and a T_g above 12.4°C. Due to the presence of hydrogen bonding, the tensile strength is as high as 49 MPa. The designed and synthesized PEUs are promising as a potential biodegradable thermoplastic with superior performances when compared with com. PBAT. A novel high-performance polymer like biodegradable PBAT was synthesized via a green and efficient copolymerization from CO₂-based bis-alkycarbamate.

ACS Sustainable Chemistry & Engineering published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C15H14O3, Safety of Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Chen, Shijian published the artcileHigh-Efficiency Lithium Metal Anode Enabled by a Concentrated/Fluorinated Ester Electrolyte, Synthetic Route of 156783-96-9, the publication is ACS Applied Materials & Interfaces (2020), 12(24), 27794-27802, database is CAplus and MEDLINE.

Lithium (Li) metal anode (LMA) has received growing attention due to its highest theor. capacity (3860 mA h g^-1) and lowest redox potential (-3.04 V vs. standard hydrogen electrode). However, practical application of LMA is obstructed by the detrimental side reactions between Li metal and organic electrolytes, especially when cycled in traditional carbonate ester electrolytes. Herein, we propose a novel fluorinated carbonate ester-based electrolyte by combining di-Et fluorocarbonate (ETFEC) solvent and 5 M LiFSI concentration (M = mol L^-1). Using this electrolyte, an ultrahigh Li plating/stripping Coulombic efficiency (CE) of 99.1% can be obtained in Li||Cu cells and a stable cycle performance of Li||LiFePO₄ is achieved under the conditions of limited Li metal (5 mA h cm^-2), moderate loading LiFePO₄ (7-8 mg cm^-2), and lean electrolyte (40 uL). The fundamental functioning mechanism of this novel electrolyte has been carefully investigated by scanning electronic microscopy (SEM), operando optical microscopy (OM), electrochem. impedance spectroscopy (EIS), XPS, and solid state NMR (SS-NMR). The results demonstrate that this optimized electrolyte facilitates formation of a high Li⁺ conductive SEI layer enriched with LiF and inorganic sulfur-containing species, which can effectively suppress the side reactions between electrolyte and Li metal and prevent formation of dead Li.

ACS Applied Materials & Interfaces published new progress about 156783-96-9. 156783-96-9 belongs to esters-buliding-blocks, auxiliary class Trifluoromethylated Building Blocks, name is Ethyl (2,2,2-trifluoroethyl) carbonate, and the molecular formula is C5H7F3O3, Synthetic Route of 156783-96-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Qiu, Jia published the artcileDibasic esters observed as potential emerging indoor air pollutants in new apartments in Beijing, China, COA of Formula: C8H14O4, the publication is Environmental Science & Technology Letters (2021), 8(6), 445-450, database is CAplus.

Volatile organic compounds (VOCs) emitted from building and furnishing materials represent a major concern of indoor air quality, in particular in new buildings. We carried out multiweek nontargeted VOC measurements in 10 new apartments in Beijing, China, using online chem. ionization mass spectrometry. Di-Me esters of succinic, glutaric, and adipic acids, which are rarely known for their presence in indoor air, were identified in three apartments. The identification was confirmed using authentic standards and by gas chromatog./mass spectrometry anal. Despite varying concentrations, the three compounds exhibited largely consistent ratios across the three apartments and throughout the observation periods. The observed ratios resemble chem. composition of dibasic esters (DBE), which are a solvent mixture of the three compounds and have been used in the coating industry. A field “sniffing” experiment further confirms DBE emissions from the coatings of some wooden furniture in at least one apartment. The average airborne DBE concentrations in the three apartments were 41, 5, and 4μg/m³, resp., exceeding the screening level of 1μg/m³ recommended by the Michigan Department of Environmental Quality, United States. In the context of fast-growing DBE usage, the current results suggest that DBE might be emerging indoor air pollutants and merit further investigation.

Environmental Science & Technology Letters published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, COA of Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hua, Yujiao published the artcileDifference of Chemical Compositions in Fu Zheng Fang with Different Dosage Forms Based on HPLC-Q-Exactive Orbitrap/MS Combined with Multivariate Statistical Analysis, Formula: C10H10O2, the publication is Current Pharmaceutical Analysis (2021), 17(6), 710-722, database is CAplus.

Fu Zheng Fang (FZF) is an important Chinese medicine prescription for tumor treatment in hospitals, which has two different types, traditional Chinese medicine (TCM) decoction pieces and TCM formula granules. Objective: This study aimed to determine the effective composition of the drug FZF. In this research, FZF decoction pieces and FZF formula granules were collected and their composition, determined by HPLC-Q-Exactive Orbitrap/MS, and multivariate statistical anal., was applied to distinguish differential metabolite patterns between two groups. A clear cut difference in the composition of the two groups was observed 124 differential chem. compositions could be identified in the pos. mode, while 59 differential chem. compositions could be identified in the neg. mode. The differential chem. compositions were mainly concentrated in flavonoids, organic acids, fatty acids, amino acid compounds, and presenting different change rules, mainly involved in two metabolic pathways; the flavonoid biosynthesis, and flavone and flavonol biosynthesis. Conclusion: This study provides basic information that may be of use in the formulation of the drug in different dosages and in the examination of their efficacy.

Current Pharmaceutical Analysis published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Formula: C10H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics