Esters-buliding-blocks

Mei, W. T. published the artcilePreparation and UV curing properties of oxazolidinone-based acrylate derivatives, SDS of cas: 15625-89-5, the publication is Reactive & Functional Polymers (2022), 105250, database is CAplus.

The oxazolidinone-based acrylate derivatives were prepared by the oxa-Michael addition reaction of neopentyl glycol diacrylate (NPGDA), trimethylolpropane triacrylate (TMPTA) and ethylene glycol dimethacrylate (EGDMA) with 3-(2-hydroxyethyl)-2-oxazolidinone (Z1), which was prepared by the reaction of di-Me carbonate (DMC) with diethanolamine (DEA). The mol. structures of the products were characterized by FT-IR, ¹H NMR and electrospray ionization high resolution mass spectrometry (ESI-HRMS). Under initiated by 1 weight% 2-isopropyl-9H-thioxanthen-9-one (ITX) and 1 weight% 2-hydroxy-2-methyl-1-phenylpropan-1-one (Da-1173), the oxazolidinone- based acrylates were cured in 30 s with double bond conversion of 92% and 98%, resp. The photopolymerization activity is in the order of oxazolidinone-based acrylate > conventional acrylate with 3 weight% EDB > conventional acrylate. The first-order kinetics for oxazolidinone part indicates that the oxazolidinone group is a hydrogen donor, which can terminate the polymeric radicals, forming an active radical to re-initiate the polymerization HRMS anal. of oligomers extracted from the UV-cured film of Bu acrylate confirms further the role of oxazolidinone part, and the plausible UV polymerization mechanism was proposed. The composition of addition product of TMPTA with Z1 (named as TMPTA-Z1) with epoxy acrylate can be 3D printed forming various models with the hardness of 5H.

Reactive & Functional Polymers 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, SDS of cas: 15625-89-5.

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

Torii, Sigeru published the artcileChemical and Electrochemical Asymmetric Dihydroxylation of Olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ Systems with Sharpless’ Ligand, Computed Properties of 5205-11-8, the publication is Journal of Organic Chemistry (1996), 61(9), 3055-60, database is CAplus and MEDLINE.

Iodine-assisted chem. and electrochem. asym. dihydroxylation of various olefins in I₂-K₂CO₃-K₂OsO₂(OH)₄ and I₂-K₃PO₄/K₂HPO₄-K₂OsO₂(OH)₄ systems with Sharpless’ ligand provided the optically active glycols in excellent conversion yields and high enantiomeric excesses. Iodine (I₂) was used stoichiometrically for the chem. dihydroxylation, and good results were obtained with nonconjugated olefins in contrast to the case of potassium ferricyanide as a co-oxidant. The potentiality of I₂ as a co-oxidant under stoichiometric conditions has been proven to be effective as an oxidizing mediator in electrolysis systems. Iodine-assisted asym. electro-dihydroxylation of olefins in either a t-BuOH/H₂O(1/1)-K₂CO₃/(DHQD)₂PHAL-(Pt) or t-BuOH/H₂O(1/1)-K₃PO₄/K₂HPO₄/(DHQD)₂PHAL-(Pt) system in the presence of potassium osmate in an undivided cell was investigated in detail. Irresp. of the substitution pattern, all the olefins afforded the diols in high yields and excellent enantiomeric excesses. A plausible mechanism is discussed on the basis of cyclic voltammograms as well as exptl. observations.

Journal of Organic Chemistry 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 C2H8Cl2N4S2, Computed Properties of 5205-11-8.

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

Wu, Xiaowei published the artcilePhoto aging and fragmentation of polypropylene food packaging materials in artificial seawater, Quality Control of 31570-04-4, the publication is Water Research (2021), 116456, database is CAplus and MEDLINE.

Plastic litters in marine environment usually contain varied types and contents of additives that can significantly affect the photochem. aging and fragmentation process of microplastics (MPs). This study investigated the photo aging process of two common polypropylene (PP) food packaging materials (i.e., meal box and tea cup) in artificial seawater within 12 d of UV irradiation Results revealed that the aging of both plastic materials were critically inhibited compared with pure PP, indicating that PP food packaging materials in natural seawater may share longer aging time than pure ones. GC-MS anal. revealed that antioxidant Irgafos 168 (tris (2,4-di-tert-butylphenyl) phosphite) was the dominant additive in these plastic materials. Photo reaction between Irgafos 168 and hydroperoxide species on the surface of MPs to prevent the formation of hydroxyl radical was the possible mechanism for the inhibiting effects. After antioxidant was exhausted, its photo degradation products could become the dominant contributor to influence the aging process of MPs. This is the first work exploring the role of antioxidant on the aging process of PP MPs in simulated ocean environment. The findings could be of great help for unraveling the effect of antioxidants on the aging-related environmental risk of hydrocarbon plastics in ocean environment.

Water 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 C20H28B2O4S2, Quality Control of 31570-04-4.

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

Jiang, Meifen published the artcileFully Continuous Flow Synthesis of 3-Chloro-4-oxopentyl Acetate: An Important Intermediate for Vitamin B1, Quality Control of 517-23-7, the publication is Organic Process Research & Development (2021), 25(9), 2020-2028, database is CAplus.

A fully continuous flow synthesis of 3-chloro-4-oxopentyl acetate, an important intermediate for vitamin B1, was developed. This continuous flow manufacturing included two chem. transformations and an inline extraction step without intermediate purification and solvent exchange. In this work, the traditional synthetic route for batch operation was efficiently simplified via a series of separated screening tests in flows under various conditions. The authors found that the chlorination reaction can be carried out in only 30 s at room temperature by flow. The decarboxylation/acylation step was also simplified by using a cross-mixer, so that acetic anhydride was no longer required in the acylation reaction. A computational fluid dynamics simulation was carried out to study the improved micromixing of liquid-liquid two-phase streams. Finally, 3-chloro-4-oxopentyl acetate was obtained in a 90% isolated yield with a product purity of 96% and a total residence time of approx. 32 min. This fully continuous process was operated smoothly for 12 h, and approx. 19.1 g of the desired product was generated with a production rate of 1.79 g h^-1.

Organic Process Research & Development published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Quality Control of 517-23-7.

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

Zhao, Shilin published the artcileInfluence of Interactions among Three Biomass Components on the Pyrolysis Behavior, Computed Properties of 517-23-7, the publication is Industrial & Engineering Chemistry Research (2018), 57(15), 5241-5249, database is CAplus.

Pyrolysis experiments between 25 and 800° for three main components (cellulose, hemicellulose, and lignin) mixed in different proportions were conducted on a thermogravimetric analyzer (TGA) and pyrolysis-gas chromatog./mass spectrometer (Py-GC/MS). The interactions between the three main components during the pyrolysis of biomass were explored from two aspects, namely thermogravimetric properties and pyrolysis products. The results indicate that interactions existed among the three biomass components in the co-pyrolysis process. The presence of lignin significantly reduces the pyrolysis rate of cellulose and inhibits the formation of sugars (mainly levoglucosan) in the pyrolysis of cellulose and hemicellulose. However, the existence of cellulose or hemicellulose greatly promotes the pyrolysis of lignin to produce phenolic compounds This finding is meaningful for the application of biomass pyrolysis.

Industrial & Engineering Chemistry Research published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H6N2O, Computed Properties of 517-23-7.

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

Yin, Lu published the artcileSupramolecular chirality induced by chiral solvation in achiral cyclic Azo-containing polymers: topological effects on chiral aggregation, HPLC of Formula: 135529-02-1, the publication is Polymer Chemistry (2018), 9(6), 769-776, database is CAplus.

Herein, a series of azobenzene (Azo)-containing side-chain cyclic polymers were successfully synthesized by combining atom transfer radical polymerization (ATRP) and Cu(I)-catalyzed azide/alkyne cycloaddition (CuAAc) “click” reaction. The aggregates of linear and cyclic Azo polymers in a dichloroethane/limonene mixed solvent were characterized by CD (CD) and UV-visible spectroscopy, demonstrating that the topol. structural constraint and mol. mass of cyclic polymers have clear effects on the supramol. chirality driven by a chiral solvent. The difference between linear and cyclic Azo aggregates in supramol. chirality became less distinct with increasing mol. mass of Azo polymers. The chiroptical switch of cyclic Azo polymers was firstly constructed by trans-cis photoisomerization and cis-trans heating-assisted reorganization processes. These interesting findings suggest that the cyclic topol. has a clear influence on the behavior of supramol. chirality induced by chiral limonene.

Polymer Chemistry published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C8H7ClO3, HPLC of Formula: 135529-02-1.

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

Yin, Lu published the artcileInduction and modulation of supramolecular chirality in side-chain azobenzene polymers through the covalent chiral domino effect, Product Details of C23H28N2O4, the publication is Science China: Chemistry (2021), 64(12), 2105-2110, database is CAplus.

Induction, transfer, and modulation of intriguing supramol. chirality were achieved in a chiral domino-type polymer system using a chiral α-end azobenzene (Azo) moiety as one chiral terminus and achiral Azo repeating units as building blocks. The Azo polymers prepared by atom transfer radical polymerization were imparted with well-controlled chain lengths and a chiral moiety at a well-defined position. One chiral terminus can effectively dictate the helical orientation of the achiral Azo stacks in the aggregation state. The spacer length between the chiral residue and the achiral repeating units dominates the preferred handedness of the side-chain Azo stacks. For instance, the R-configuration moiety with a short alkyl chain (with 0, 2, and 3 carbons) induces right-handed supramol. chirality, whereas those with long alkyl chains (with 4, 5, and 6 carbons) induce the opposite helical orientation of the Azo units. Moreover, the chiral regulation of polymer aggregates is successfully achieved using the unique photoisomerization transition of the Azo chromophore and the heat-assisted reassembly approach. Chiral induction and chiral-to-achiral communication are further verified via theor. simulations.

Science China: Chemistry published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C18H17NO8, Product Details of C23H28N2O4.

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

Jiang, Ruming published the artcileFacile fabrication of organic dyed polymer nanoparticles with aggregation-induced emission using an ultrasound-assisted multicomponent reaction and their biological imaging, Synthetic Route of 3052-61-7, the publication is Journal of Colloid and Interface Science (2018), 137-144, database is CAplus and MEDLINE.

Ultrasound as a powerful technique has increasingly been used in both industry and academia in recent years. Herein, an efficient approach to the ultrafast preparation of cross-linked fluorescent copolymers (PEGMA-AEMA-TPE) with aggregation-induced emission (AIE) via an ultrasound-assisted multicomponent reaction (MCR) is described. A number of characterization techniques were carried out to certify the successful preparation of these AIE-active copolymers. Due to the introduction of a hydrophilic PEG fragment and a hydrophobic AIE-active dye, the obtained fluorescent copolymers showed amphiphilic properties and could assemble into organic dyed polymer nanoparticles (ODPNs) with great water dispersibility. The final PEGMA-AEMA-TPE ODPNs demonstrated intense fluorescence, strong photostability, a low critical micelle concentration (CMC) of 0.007 mg mL^-1 and high biocompatibility. More importantly, the PEGMA-AEMA-TPE ODPNs show obvious AIE characteristics, which could elegantly overcome the quenching effect caused by the aggregation of ODPNs based on conventional organic dyes. Considered the above results, we believe that these AIE-active ODPNs should be promising candidates for biol. imaging and other biomedical applications.

Journal of Colloid and Interface Science published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Synthetic Route of 3052-61-7.

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

Jiang, Ruming published the artcileFacile construction and biological imaging of cross-linked fluorescent organic nanoparticles with aggregation-induced emission feature through a catalyst-free azide-alkyne click reaction, HPLC of Formula: 3052-61-7, the publication is Dyes and Pigments (2018), 52-60, database is CAplus.

The research in fluorescent organic nanoparticles (FONs) with aggregation-induced emission (AIE) feature shows an upward trend due to their outstanding optical properties and potential biomedical applications. In this work, a novel strategy has been developed for the first time through a catalyst-free azide-alkyne click reaction, which could directly conjugate azide containing polymers (PEGMA-AGE-N₃) and alkyne terminating AIE dye (named as PhE-OE) under mild exptl. conditions. The final PEGMA-AGE-PhE copolymers containing AIE-active dye could self-assemble into FONs with intense fluorescence owing to their AIE feature. These PEGMA-AGE-PhE FONs were characterized by a series of characterization techniques in details. The cell viability as well as cell uptake behavior of PEGMA-AGE-PhE FONs was also examined to evaluate their potential for biomedical applications. We demonstrated that the catalyst-free azide-alkyne click reaction is effective for fabrication of AIE-active FONs and these AIE-active FONs showed high water dispersity and AIE feature. Moreover, the PEGMA-AGE-PhE FONs also exhibited low cytotoxicity and great potential for biol. imaging. Taken together, a facile catalyst-free azide-alkyne click reaction with high efficiency has been developed for the preparation of AIE-active FONs, which showed excellent physicochem. properties for biol. imaging applications.

Dyes and Pigments published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, HPLC of Formula: 3052-61-7.

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

Dong, Jiande published the artcileUltrafast fabrication of fluorescent organic nanoparticles with aggregation-induced emission feature through the microwave-assisted Biginelli reaction, COA of Formula: C12H17NS2, the publication is Dyes and Pigments (2019), 90-96, database is CAplus.

Because of its unique optical properties, the aggregation-induced emission (AIE) dye has attracted extensive attention for various applications. Especially, the utilization of AIE-active dyes for fabrication of fluorescent organic nanoparticles (FONs) has attracted the most research interest for biomedical applications. Therefore, the development of novel and effective strategies to design and prepare AIE-active FONs should be of great importance for the biomedical applications of AIE-active FONs. In this report, we reported an ultrafast strategy that based on the one-pot microwave-assisted Biginelli reaction for fabrication of AIE-active poly(AA-AEMA-TPE) copolymers, which use the 2-(methacryloyoxy)ethylacete, acrylic acid (AA) and 4′,4”’-(1,2-diphenylethene-1,2-diyl) bis([1,1′-biphenyl]-4-carbaldehyde) (TPE-CHO) as the substrates. The microwave-assisted Biginelli reaction is simple, efficient and atom-economical and can be accomplished within 3 min. Owing to their amphiphilicity, poly(AA-AEMA-TPE) copolymers will self-assemble into FONs with small size and high water dispersibility. The proton NMR (¹H NMR) spectroscopy, UV-Vis spectrum and fluorescence spectrometer were used to characterize the resultant copolymers. We demonstrated that poly(AA-AEMA-TPE) FONs possess many excellent properties, such as high water dispersibility, intense fluorescence, obvious AIE feature and favorable biocompatibility. The above results suggest that poly(AA-AEMA-TPE) FONs are of great potential for fluorescent imaging. Moreover, the microwave-assisted Biginelli reaction can occur under a rather benign environment with high efficiency and good substrate adaptability. Therefore, we believe that the method developed in this work could greatly advance the applications of AIE-active functional materials.

Dyes and Pigments published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, COA of Formula: C12H17NS2.

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