Tag: M.W=150-200

Chen, Hong published the artcileRhenium(I) N-Heterocyclic Carbene Complexes in Photoinitiating Systems for Polymerization upon Visible Light: Development of Photosensitive Resins for 3D and 4D Applications, Computed Properties of 10287-53-3, the publication is ACS Applied Polymer Materials (2021), 3(1), 464-473, database is CAplus.

Two fac-rhenium tris-carbonyl complexes bearing a π-accepting pyridoannelated N-heterocyclic carbene (NHC) ligand with general formula Re(CO)₃(pyipy)X, where pyipy is 2-pyridil-imidazo[1,5-a]pyridine-3-ylidene and X = Cl (Re1) and Br (Re2), are investigated as photoredox catalytic systems in light-promoted polymerization reactions. Both rhenium(I) complexes are able to efficiently generate radicals to initiate free radical polymerization Remarkably, excellent radical polymerization profiles and final conversions are obtained under soft irradiations (LED lamp, λ_exc = 405 nm) by using the proposed complexes with iodonium salt and amine as photoinitiating systems (PISs) for polyethyleneglycol (PEG)-acrylate monomers. The involved mechanism is investigated by means of different spectroscopic techniques and further supported by electrochem. data. In addition, using the prepared three-component PISs, outstanding 3D patterns with spatial resolution could be obtained through direct laser write experiments Remarkably, the resulting material displays reversible deformation that can be controlled with heating-hydration cycles due to stimuli-responsiveness of PEG chains of the polymeric network, thus opening the way for innovative smart and stimuli-responsive 4D-printed materials and soft actuators.

ACS Applied Polymer Materials 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, Computed Properties of 10287-53-3.

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

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

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

Zhang, Huiyuan published the artcileA Sprayable and Visible Light Rapid-Cured Strippable Film for Surface Radioactive Decontamination, SDS of cas: 10287-53-3, the publication is Polymers (Basel, Switzerland) (2022), 14(5), 1008, database is CAplus and MEDLINE.

Strippable film is effective for removing radioactive contamination. However, it still has some limitations, such as the long curing time (about 30 min∼24 h) and the requirement of organic solvents. To address these issues, we report a simple protocol to prepare strippable decontamination films using liquid polybutadiene (LPB) and tert-Bu acrylate (TBA) as the raw materials without solvent and using camphorquinone/ethyl 4-dimethylaminobenzoate (CQ/EDB) as a photoinitiator, where the film was formed under household LED panel light or daylight irradiation for about 540 s. After a thorough study of viscosity, real-time Fourier transform IR (RT-FTIR spectra), gel and volatile organic compound (VOC) contents, mech. properties and decontamination efficiency, the optimum composition and curing conditions were determined for the decontamination strippable film. VOC content is as low as 12.7 ± 0.7and the resultant strippable film exhibits good mech. performances with a tensile strength of up to 5.4 ± 0.4 MPa and elongation of up to 66.6 ± 13. Most important, the decontamination efficiencies of this strippable film for 133CsCl on glass, ceramic and metal surfaces reach up to 98.1, 94.3and 97.6, resp.

Polymers (Basel, Switzerland) 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 C18H28N2O7, SDS of cas: 10287-53-3.

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

Wang, Hong-Gang published the artcileItaconate aggravates experimental colitis, HPLC of Formula: 617-52-7, the publication is Clinics and Research in Hepatology and Gastroenterology (2021), 45(2), 101629, database is CAplus and MEDLINE.

Itaconate (ITA) is an immunometabolite derived by activated macrophages and exhibits potential anti-inflammatory activity. Previous studies have suggested that ITA derivatives such as di-Me ITA and 4-octyl ITA can significantly inhibit LPS induced macrophage activation and reduce the secretion of pro-inflammatory factors.

Clinics and Research in Hepatology and Gastroenterology 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 C18H20N2O12, HPLC of Formula: 617-52-7.

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

Fang, Xianhe published the artcileScalable Total Synthesis of (-)-Triptonide: Serendipitous Discovery of a Visible-Light-Promoted Olefin Coupling Initiated by Metal-Catalyzed Hydrogen Atom Transfer (MHAT), Application In Synthesis of 5205-11-8, the publication is Journal of the American Chemical Society (2022), 144(5), 2292-2300, database is CAplus and MEDLINE.

An efficient and scalable total synthesis of (-)-triptonide is accomplished based on a metal-catalyzed hydrogen atom transfer (MHAT)-initiated radical cyclization. During the optimization of the key step, we discovered that blue LEDs significantly promoted the efficiency of reaction initiated by Co(TPP)-catalyzed MHAT. Further exploration and optimization of this catalytic system led to development of a dehydrogenative MHAT-initiated Giese reaction.

Journal of the American Chemical Society 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, Application In Synthesis of 5205-11-8.

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

Blanco-Zubiaguirre, L. published the artcileMigration of photoinitiators, phthalates and plasticizers from paper and cardboard materials into different simulants and foodstuffs, Name: Ethyl 4-dimethylaminobenzoate, the publication is Food Chemistry (2021), 128597, database is CAplus and MEDLINE.

The migration of photoinitiators, phthalates and plasticizers from two paper and cardboard materials into food simulants (50% and 95% EtOH and Tenax) and foodstuffs (rice, cereals and milk powder) was studied. In the case of liquid simulants migration was observed to reach the equilibrium after 60 min and depended on the material type and the physicochem. parameters of the migrants, whereas the temperature (room temperature and 60°C) did not show significant effects. The study of migration of the compounds from a baking paper to Tenax at high temperatures (150 and 250°C) evidenced an increment of migration when increasing temperature, except for the most volatile analytes. Finally, the migration to foodstuffs was studied using fully validated anal. protocols. Overall, the comparison of the migration rates demonstrated that Tenax was adequate for the simulation of the migration to rice and cereals, but underestimated the migration to infant milk powder, for which 95% EtOH resulted a more suitable simulant.

Food 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, Name: Ethyl 4-dimethylaminobenzoate.

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