Category: esters-buliding-blocks

Liu, Shaohui published the artcileDesign of photoinitiating systems based on the chalcone-anthracene scaffold for LED cationic photopolymerization and application in 3D printing, Quality Control of 10287-53-3, the publication is European Polymer Journal (2021), 110300, database is CAplus.

In this study, light-emitting diodes (LEDs) used as secure, low-cost and possessing long emission wavelengths irradiation sources were applied in photopolymerization Seven novel anthracene derivatives were proposed and evaluated in photosensitive systems. Three of them were never synthesized before and the other derivatives were evaluated in other fields. Due to the in-silico design of mol. structure by mol. modeling, the proposed chalcone-anthracenes showed a broad absorption band in the visible region with favorable molar extinction coefficients Photoinitiation abilities of the different photoinitiating systems were examined by the Real-Time Fourier Transformed IR Spectroscopy. The free radical polymerization of acrylates under LED@405 nm irradiation in laminate was evaluated and high final function conversions (FCs) were obtained in the presence of three-component photoinitiating systems based on chalcone-anthracenes/iodonium salt/amine. Meanwhile, the chalcone-anthracene derivatives exhibited high photoinitiation abilities in cationic photopolymerization of epoxides in combination with an iodonium salt under LED@405 nm irradiation The final function conversions of epoxy using some anthracene/iodonium salt systems were even higher than the well-established dibutoxyanthracene (DBA)/iodonium salt benchmark system. In addition, due to the good light absorption properties, the cationic photopolymerization also was carried out in the presence of the chalcone-anthracene/iodonium salt systems under LED@470 nm or laser diode@447 nm irradiation (not possible to do with the reference DBA systems). Markedly, these derivatives were also able to sensitize sulfonium salts. The photochem. reactivity of anthracene derivatives was investigated through the steady state photolysis and fluorescence quenching experiments Furthermore, the proposed interaction mechanisms of chalcone-anthracene derivatives and additives (iodonium salt and amine) were discussed using the free energy changes of electron transfer reactions. Interestingly, the cationic photopolymerization of A5/iodonium salt system was applied in 3D printing and the 3D patterns showed a good spatial resolution

European Polymer Journal published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Quality Control of 10287-53-3.

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

Di, Xiaohui published the artcileIonic Liquid-Strengthened Immobilized Rhizomucor miehei Lipase for Catalytic Esterification of Itaconic Acid in Aqueous Media, HPLC of Formula: 617-52-7, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(4), 1805-1812, database is CAplus.

Di-Me itaconate (DI), a promising biomass-derived intermediate, cannot be synthesized from itaconic acid (IA) in organisms due to the lack of metabolic pathways. It is necessary to develop a green and high-efficiency method to synthesis DI from IA. In this study, DI was, for the first time, produced from IA in an aqueous medium by an ionic liquid-strengthened enzymic method. We found that when pretreated by the ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF₆]), the pH tolerance range of the lipase shrunk and the hydrolysis activity of it was greatly inhibited, while its esterification activity was not. Moreover, when the [bmim][PF₆]-treated immobilized Rhizomucor miehei lipase (RML, 50 mg/mL) was employed in a reaction containing IA/methanol at a molar ratio of 1:30 and methanol/water in a volume ratio of 1:10 at 30°C after 24 h, a 64.3% yield and 73.2% selectivity of DI was obtained. The results of HPLC and GC-MS revealed that in addition to the main product DI, other side products including acetic acid, propionic acid, and itaconic acid cyclolactone were also generated, which indicates that the RML-catalyzed esterification of IA and methanol has various side reactions, such as lactonization and self-decomposition of IA. Greenly and high-efficiently, we convert biomass-sourced itaconic acid to di-Me itaconate using an ionic liquid-strengthened enzymic method in aqueous media.

ACS Sustainable Chemistry & Engineering 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 C7H10O4, HPLC of Formula: 617-52-7.

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

Jian, Tongtong published the artcileMetabolomic comparison between natural Huaier and artificial cultured Huaier, SDS of cas: 103-26-4, the publication is Biomedical Chromatography (2022), 36(6), e5355, database is CAplus and MEDLINE.

Vanderbylia robiniophila (Murrill) B. K. (Huaier) is a kind of higher fungal fruiting body that is parasitic on the trunk of Sophora japonica and Robinia pseudoacacia L.. As a traditional Chinese medicine with a history of more than 1,600 years, Huaier has attracted wide attention for its excellent anticancer activity. A systematic study on the metabolome differences between natural Huaier and artificial cultured Huaier was conducted using liquid chromatog.-mass spectrometry in this study. Principal component anal. and orthogonal projection on latent structure-discriminant anal. results showed that cultured Huaier evidently separated and individually separated from natural Huaier, indicating metabolome differences between natural and cultured Huaier. Hierarchical clustering anal. was further performed to cluster the differential metabolites and samples based on their metabolic similarity. The higher contents of amino acids, alkaloids and terpenoids in natural Huaier make it an excellent choice as a traditional Chinese medicine for anticancer or nutritional supplementation. The results of the Bel-7,402 and A549 cell cytotoxicity tests showed that the anticancer activity of natural Huaier was better than that of cultured Huaier. This may be due to the difference in chem. composition, which makes the anticancer activities of natural and cultured Huaier different.

Biomedical Chromatography 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, SDS of cas: 103-26-4.

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

Li, Hui published the artcileEffect of a novel bio-based β-nucleating agent on the properties of isotactic polypropylene, SDS of cas: 31570-04-4, the publication is Journal of Polymer Research (2021), 28(12), 473, database is CAplus.

This study reported a series of esterified lignin metal salts (EL-M, M = Na, Mg, Ca, Ba, Zn) derived from lignin as nucleating agents, which were used in isotactic polypropylene (iPP). The crystallization and melting behavior and mech. properties of iPP/EL-M composites were studied. The results of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) revealed that the crystallization temperature of iPP/EL-M composites increased by 5 to 8°C compared with that of pure iPP. Simultaneously, EL-Zn, EL-Ba and EL-Ca all had strong β-crystal induction ability to iPP. Especially, when the addition amount of EL-Zn in iPP was 0.20 weight%, the relative β-content of iPP/EL-Zn reached up to 0.9277, and it was basically not affected by the cooling rate, indicating that EL-Zn was extremely active, selective and stable for iPP. For the vantage, the results of mech. properties and SEM revealed that EL-Zn, EL-Ba or EL-Ca could improve the toughness of iPP to a certain extent.

Journal of Polymer Research published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, SDS of cas: 31570-04-4.

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

Tian, Xiao-Shuang published the artcileEffect of char-forming agents rich in tertiary carbon on flame retardant properties of polypropylene, Safety of Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Journal of Thermal Analysis and Calorimetry, database is CAplus.

In this research, a novel type of triazine-based char-forming agent (PTPA) was synthesized and combined with ammonium polyphosphate (APP) to form an intumescent flame retardant (IFR) system to prevent polypropylene (PP) burning. A commercialized char-forming agent was purchased and the same process was used to study its flame retardant performance on polypropylene, and the results were compared with those of this experiment It was found that the PP/IFR samples in this experiment (APP/PTPA = 4/1-1/1) reached the increased limiting oxygen index (LOI) value of 29.5%, and passed the vertical combustion (UL-94) V-0 rating. The maximum LOI for the purchase of char-forming agent is 31.0%. Thermogravimetric anal. results show that the PTPA/APP system can improve the thermal stability and thermal oxidation stability of carbon slag. The carbon residue was further studied by visual observation and SEM. The dense coke residues formed hinder the transfer of gas and heat during the combustion process, and ultimately endow the PP/IFR system with higher flame retardancy.

Journal of Thermal Analysis and Calorimetry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C10H9IO4, Safety of Tris(2,4-di-tert-butylphenyl) phosphite.

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

Wang, Zi-Qiang published the artcileEffect of sodium lignosulfonate/nano calcium carbonate composite filler on properties of isotactic polypropylene, SDS of cas: 31570-04-4, the publication is Polymer Bulletin (Heidelberg, Germany), database is CAplus.

A novel composite filler sodium lignosulfonate/nano calcium carbonate (SL/CaCO₃) was prepared by dry ball milling. Thermogravimetric anal. revealed that the composite filler SL/CaCO₃ had improved thermal properties. The crystallization and melting behavior of isotactic polypropylene (iPP) modified by the composite filler was studied by differential scanning calorimetry. The best complex ratio (1:3) and optimal addition amount (2 weight%) of iPP nucleated by SL/CaCO₃ were confirmed. The results reflected that a small amount of SL/CaCO₃ into iPP could improve the nucleation ability, and excellent mech. properties were obtained. The relative contents of β-crystals (K_β) in iPP were above 0.83 after addition of the composite filler. At the same time, nano CaCO₃ played a significant role in crystallizing the iPP nucleated and greatly influenced the content of β-crystals. The elongation at break was increased by 32.27% and the impact strength was increased by 62.38% compared to those of pure iPP.

Polymer Bulletin (Heidelberg, Germany) published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C7H13NO2, SDS of cas: 31570-04-4.

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

Xia, Min-Qiang published the artcileThe relation between chemical structure of branched amide nucleating agents and nucleation effect in isotactic polypropylene, Quality Control of 31570-04-4, the publication is Journal of Thermal Analysis and Calorimetry (2021), 145(6), 3053-3066, database is CAplus.

The relation between chem. structure of branched amide compounds as nucleating agents and the nucleation effect of them in isotactic polypropylene (iPP) was investigated through studying the crystallization and melting behavior of iPP nucleated with these nucleating agents by differential scanning calorimetry (DSC). The crystallization peak temperature (T_c) of nucleated iPP had different degrees of increase after the amide groups were introduced into the benzene ring. The nucleation efficiency of 1,3,5-benzenetrisamide was superior to that of terephthalamide due to the existence of benzamide. At the same time, the nucleation effect of different side chain-substituted amide compounds on iPP was investigated. The results showed that the crystallization peak temperature of iPP nucleated with ring-substituted amides was higher than that of iPP nucleated with chain-substituted amides, that of the 6-membered ring-substituted amides was better than that of the five-membered ring-substituted amides and that of the cyclohexyl group substitution was superior to that of the benzene ring. Besides, the amide compounds with different central group were also studied as iPP nucleating agents. The results show that the sequence of nucleating efficiency from high to low is six carbons > benzene > ten carbons. Under the optimum content of BTA-CP, BTA-TP and BTA-IP, the crystallization peak temperature of nucleated iPP was increased from 117.6°C of pure iPP to 127.2°C, 125.7°C and 123.4°C, resp.

Journal of Thermal Analysis and Calorimetry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C7H8BrClFN, Quality Control of 31570-04-4.

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

Xiao, Dengming published the artcileSynthesis of a Novel Chiral Binaphthyl Phospholane and Its Application in the Highly Enantioselective Hydrogenation of Enamides, Category: esters-buliding-blocks, the publication is Organic Letters (1999), 1(10), 1679-1681, database is CAplus and MEDLINE.

A new chiral phosphine, (R,R)-1,2-bis{(R)-4,5-dihydro-3H-dinaphtho[2,1-c:1′,2′-e]phosphepino}benzene [(R,R)-binaphane] was prepared from readily accessible enantiomerically pure (R)-binaphthalenol. This ligand possesses both binaphthyl chirality and phospholane functionality. Excellent enantioselectivities (95-99.6% ee) have been observed in hydrogenation of an isomeric mixture of (E)- and (Z)-RCH:CR¹NHAc [R = H, Me, CH₂Ph, CHMe₂; R¹ = (un)substituted Ph, 2-naphthyl] by using a Rh-binaphane catalyst. These enantioselectivities are the highest reported to date for this transformation.

Organic Letters 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 C12H15NO, Category: esters-buliding-blocks.

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

Wu, Guolong published the artcileExtraction and separation of yttrium from other rare earths in chloride medium by phosphorylcarboxylic acids, HPLC of Formula: 103-26-4, the publication is Journal of Rare Earths (2022), 40(6), 958-964, database is CAplus.

Two phosphorylcarboxylic acids, 3-((bis(2-ethylhexyloxy))phosphoryl)propanoic acid (PPA) and 3-((bis(2-ethylhexyloxy))phosphoryl)-3-phenylpropanoic acid (PPPA), were synthesized for separating yttrium from other rare earths in the chloride feed of ion-adsorption type rare earth concentrate The effect of the factors such as pH_1/2, temperature, saponification degree and phase modifiers was investigated. The separation efficiencies of PPA and PPPA are obviously better than the typical extractants such as sec-octylphenoxy acetic acid (CA-12) and naphthenic acid (NA). The extraction process of rare earths by PPA and PPPA is a cation exchanging reaction, which is similar to those of CA-12 and NA. The loaded rare earths in both PPA and PPPA systems can be effectively back-extracted by 0.5 mol/L HCl or higher concentration A cascade extraction process for separating yttrium from other rare earths was developed using PPPA as the extractant. The yttrium product with the purity of 97.20 wt% was obtained by 35 stages of extraction and 12 stages of scrubbing.

Journal of Rare Earths 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 C18H23N3O4S, HPLC of Formula: 103-26-4.

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

Liu, Jie published the artcileDesign, synthesis, in vitro and in vivo evaluation against MRSA and molecular docking studies of novel pleuromutilin derivatives bearing 1, 3, 4-oxadiazole linker, COA of Formula: C11H15NO2, the publication is Bioorganic Chemistry (2021), 104956, database is CAplus and MEDLINE.

A class of pleuromutilin derivatives containing 1,3,4-oxadiazole were designed and synthesized as potential antibacterial agents against Methicillin-resistant staphylococcus aureus (MRSA). The ultrasound-assisted reaction was proposed as a green chem. method to synthesize 1,3,4-oxadiazole derivatives Among these pleuromutilin derivatives, compound 133 (I) was found to be the strongest antibacterial derivative against MRSA (MIC = 0.125μg/mL). Furthermore, the result of the time-kill curves displayed that compound 133 could inhibit the growth of MRSA in vitro quickly (-4.36 log10 CFU/mL reduction). Then, compound 133 (-1.82 log₁₀ CFU/mL) displayed superior in vivo antibacterial efficacy than tiamulin (-0.82 log₁₀ CFU/mL) in reducing MRSA load in mice thigh model. Besides, compound 133 exhibited low cytotoxicity to RAW 264.7 cells. Mol. docking studies revealed that compound 133 was successfully localized in the binding pocket of 50S ribosomal subunit (ΔG_b = -10.50 kcal/mol). The results indicated that these pleuromutilin derivatives containing 1,3,4-oxadiazole might be further developed into novel antibiotics against MRSA.

Bioorganic Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, COA of Formula: C11H15NO2.

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