Esters-buliding-blocks

Liu, Jian published the artcilePrinting 3D Of Complex-Shaped Polymer-Derived Ceramics With Enhanced Structural Retention, Recommanded Product: Trimethylolpropane triacrylate, the publication is Materials and Manufacturing Processes (2022), 37(11), 1267-1279, database is CAplus.

The combination of polymer-derived ceramics and DLP 3D printing has significant advantages for manufacturing special polynary ceramics with complex structures. However, a large number of the organic components in the precursor rapidly burn out and release after evaporation during pyrolysis. This leads to structural retention issues such as sample deformation, shrinkage and cracking. The surface morphol. and accuracy of the sample are greatly affected by the escape of organic matter and the release of thermal stress during the pyrolysis process. Therefore, this study employs the method of adding low-melting-point silicone oil based on the original material components. The slow burn-out process of silicone oil at a lower temperature can produce fine pores, which would aid the release of thermal stress. Addnl., it can provide channels for escape of the organic gas at high-temperature, which helps to reduce large deformation and cracking and improves the surface morphol. and dimensional accuracy of the final pyrolyzed samples. The method studied in this work helps to enhance the structural retention of complex-shaped polymer-derived ceramics manufactured by 3D printing and high-temperature pyrolysis, which could be beneficial to the further mass fabrication of such ceramic products.

Materials and Manufacturing Processes published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Recommanded Product: Trimethylolpropane triacrylate.

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

Wang, Wanyi published the artcileAnalysis, occurrence, toxicity and environmental health risks of synthetic phenolic antioxidants: A review, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Environmental Research (2021), 111531, database is CAplus and MEDLINE.

A review. The continuous improvement of living standards is related to higher requirements for the freshness and taste of food. For example, synthetic phenolic antioxidants (SPAs) are added to fats and fried foods as food additives to minimize the oxidative rancidity of oils and fats. Hence, the global use of SPAs is increasing year by year. Di-Bu hydroxytoluene is one of the widely used SPAs, often in combination with Bu hydroxyanisole or gallate SPAs. The extensive use of these compounds makes them and their transformation products to be widespread in various environmental matrixes, including indoor dust, wastewater, river water, sewage sludge, and sediment, as well as human samples, such as nails and urine, at concentrations varying from nanogram per g (ng/g) to microgram per g (μg/g). Animal experiments have shown that high-dose SPA exposure is toxic, which may lead to DNA damage and mismatches and the development of cancerous tumors. Since the biosphere shares the same set of genetic codes, humans and animals have many identical or similar feedback mechanisms and information pathways. Therefore, the damage of SPAs to animals may also threaten human health. This review discusses the properties, occurrence, anal., and environmental health risks of typical SPAs, including Bu hydroxyanisole, di-Bu hydroxytoluene, tert-butylhydroquinone, Pr gallate, octyl gallate, and lauryl gallate, used as food additives. In addition, AO2246, which is used in food packaging bags, is also considered. Future research directions on SPAs and their transformation products (TPs) are identified and discussed.

Environmental Research published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C24H12, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate.

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

Wei, Rongbiao published the artcileIron-Catalyzed Alkylazidation of 1,1-Disubstituted Alkenes with Diacylperoxides and TMSN₃, Category: esters-buliding-blocks, the publication is Organic Letters (2020), 22(8), 3195-3199, database is CAplus and MEDLINE.

An iron-catalyzed radical alkylazidation of electron-deficient alkenes was reported. Alkyl diacyl peroxides worked as the alkyl source, and trimethylsilyl azide acted as the azido reservoir. This method featured mild reaction conditions, wide substrate scope, and good functional group tolerance, providing a range of α-azido compounds I [R = H, Me, Ph, etc.; R¹ = Me, Et, Bn; R² = Me, C₅H₁₁, C₁₁H₂₃, etc.] in high yields. These azides could be easily transferred into many kinds of amino acid derivatives

Organic Letters published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C3H8N2S, Category: esters-buliding-blocks.

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

Feng, Zhigang published the artcilePalladium-catalyzed cross-coupling reaction of arenesulfonate with phosphite, COA of Formula: C22H12F6O6S2, the publication is Youji Huaxue (2018), 38(4), 896-901, database is CAplus.

Organo-phosphorus compounds have important applications in metal-organic chem., coordination chem. and biochem. Therefore, the C-P cross-coupling reaction was an important method to prepare organo-phosphorus, which is also a hotspot of current research. Hence, we have studied a kind of cross-coupling reaction between arenesulfonate and phosphites using palladium as the catalyst to synthesize a series of organo-phosphorus compounds efficiently, and the approach was applied to prepare a chiral N/P ligand.

Youji Huaxue published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, COA of Formula: C22H12F6O6S2.

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

Zhong, Yongzhi published the artcilePBP1 plays key roles in sex pheromone reception of the fall armyworm, Quality Control of 16974-11-1, the publication is International Journal of Biological Macromolecules (2022), 162-169, database is CAplus and MEDLINE.

Spodoptera frugiperda among the China population employs a four-component sex pheromone blend to accelerate male-female allocation and mating behavior. The underlying mol. mechanism has been incompletely elucidated. In the current study, we showed that differences existed between genders toward the four sex pheromone components, including Z9-14:AC, Z7-12:AC, Z9-12:AC, and Z11-16:AC, in terms of electrophysiol. responses and behavioral valences. Male adults were significantly more sensitive to all tested compounds than female adults. Furthermore, ecol. outputs may be related to four pheromone-binding proteins, namely, SfruPBP1, SfruPBP2, SfruPBP3, and SfruPBP4. They formed four distinct clades within the lepidopteran phylogeny, and male adults expressed significantly higher levels of SfruPBP1 and SfruPBP2 than female adults. We observed the highest binding affinities of SfruPBP1 toward all four sex pheromone components. SfruPBP4 had moderate binding affinities for Z7-12:AC, Z11-16:AC, and Z9-12:AC, while SfruPBP2 showed binding toward Z9-14:AC. This observation suggests that SfruPBP1 plays a key role in sex pheromone discrimination and drives sexually biased behavioral decisions toward certain pheromone components. These findings will help to develop behavioral-mediating tools as part of integrated pest management approaches for this cross-border pest.

International Journal of Biological Macromolecules published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C6H8N2, Quality Control of 16974-11-1.

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

Zhang, Muliang published the artcileA general deoxygenation approach for synthesis of ketones from aromatic carboxylic acids and alkenes, Application In Synthesis of 1877-71-0, the publication is Nature Communications (2018), 9(1), 1-10, database is CAplus and MEDLINE.

The construction of an aryl ketone structural unit by means of catalytic carbon-carbon coupling reactions represents the state-of-the-art in organic chem. Herein we achieved the direct deoxygenative ketone synthesis in aqueous solution from readily available aromatic carboxylic acids and alkenes, affording structurally diverse ketones I (FG = 4-Me, 4-Ph, 4-BnO, etc.) in moderate to good yields. Visible-light photoredox catalysis enables the direct deoxygenation of acids as acyl sources with triphenylphosphine and represents a distinct perspective on activation. The synthetic robustness is supported by the late-stage modification of several pharmaceutical compounds and complex mols. This ketone synthetic strategy is further applied to the synthesis of the drug zolpidem in three steps with 50% total yield and a concise construction of cyclophane-braced 18-20 membered macrocycloketones. It represents not only the advancement for the streamlined synthesis of aromatic ketones from feedstock chems., but also a photoredox radical activation mode beyond the redox potential of carboxylic acids.

Nature Communications published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H13BO3, Application In Synthesis of 1877-71-0.

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

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

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

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