Category: 517-23-7

On January 12, 2022, Zhang, Jiajun; Paladugu, Srinivas R.; Gillard, Rachel M.; Sarkar, Anindya; Boger, Dale L. published an article.Related Products of 517-23-7 The title of the article was Tris(4-bromophenyl)aminium Hexachloroantimonate-Mediated Intermolecular C(sp2)-C(sp3) Free Radical Coupling of Vindoline with β-Ketoesters and Related Compounds. And the article contained the following:

A powerful tris(4-bromophenyl)aminium hexachloroantimonate (BAHA) mediated regioselective intermol. coupling reaction of vindoline with a wide range of substrates that include β-ketoesters, β-diketones, β-ketoaldehydes, β-ketonitriles, β-ketolactones, β-ketolactams, β-cyanoesters, and malononitriles is detailed. The BAHA-promoted intermol. sp3/sp2 coupling, representing a special class of selective C-H functionalization reactions with direct carbon-carbon bond formation, proceeds with generation of a quaternary center bound to the aryl C15 center of vindoline capable of accommodating of the vinblastine C16′ Me ester and functionalized for subsequent divergent heterocycle introduction. A comprehensive examination of the reaction scope, optimization of subtle reaction parameters, and key insights into the reaction mechanism are described. Contrary to what might be prevailing expectations, studies suggest the plausible mechanism entails initial single-electron oxidation of the substrate enolate, not vindoline, and subsequent regiospecific addition of the resulting electrophilic radical to vindoline. As such and beyond the new arylation reaction with vindoline, the studies define a host of new, previously unrecognized, applications of BAHA and related triarylaminium radical cations that arises from their ability to generate stabilized electrophilic radicals from β-ketoesters and related substrates under nonreducing and metal-free conditions. Those exemplified herein include mediating stabilized enolate free radical arylation, dimerization, allylation, alkene addition, and α-oxidation reactions. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Related Products of 517-23-7

The Article related to vindoline ketoester tris bromophenylaminium hexachloroantimonate regioselective radical coupling, Alkaloids: Alkaloids Containing Two Nitrogen Atoms and other aspects.Related Products of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On February 5, 2020, Fan, Wuhou; Jin, Yong; Shi, Liangjie; Du, Weining; Zhou, Rong; Lai, Shuanquan; Shen, Yichao; Li, Yupeng published an article.Related Products of 517-23-7 The title of the article was Achieving fast self-healing and reprocessing of supertough water-dispersed “living” supramolecular polymers containing dynamic ditelluride bonds under visible light. And the article contained the following:

It is very challenging to achieve polymers that are mech. robust and fast self-healable at ambient conditions, which are highly desirable for smart materials of the next-generation. Herein, combining dynamic ditelluride bonds and 2-ureido-4[1H]-pyrimidinone (UPy) moieties in the main chains, a novel type of visible-light-induced self-healing water-dispersed supramol. polymers (DTe-WSPs) with outstanding healing properties were developed. The prepared DTe-WSPs emulsions showed excellent emulsion stability, and highly transparent DTe-WSPs films obtained from these emulsions exhibited much improved mech. properties and fast recoverability after the incorporation of UPy groups, owing to the phys. cross-links formed by quadruple hydrogen-bonded UPy moieties. Supertoughness (105.2 MJ m-3) and fast self-healability under visible light (healing efficiency of 85.6% within 10 min) could be achieved simultaneously with the adjustment of the ditelluride content and the UPy content, and the toughness of our polymers is higher than those of the reported ambient temperature self-healable polymers. The visible-light-induced ditelluride metathesis is a predominant factor in the healing process of DTe-WSPs, and the ditelluride metathesis triggered by photothermy and hydrogen bonding could also afford the ultimate healing result. Meanwhile, DTe-WSPs can be reprocessed using visible light, providing a facile way to process polymers at mild conditions. To our surprise, the “living” DTe-WSPs exhibited the ability to initiate the polymerization of vinyl monomers under visible light, which is first reported for water-dispersed self-healing polymers. We considered the elaborated design philosophy, based on the readily available, clean, safe, and easily manipulated visible light, which can not only provide inspiration for preparing fast ambient temperature self-healing and reprocessing polymer materials with robust mech. properties but also develop a new macroinitiator to initiate the ambient temperature polymerization of vinyl monomers. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Related Products of 517-23-7

The Article related to telluride ureidopyrimidinone supramol polymer light self healing, photoinitiated polymerization, reprocessing, self-healing, supramolecular polymer, visible light, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Related Products of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On January 15, 2020, Larsen, Matthew A.; Hennessy, Elisabeth T.; Deem, Madeleine C.; Lam, Yu-hong; Sauri, Josep; Sather, Aaron C. published an article.Electric Literature of 517-23-7 The title of the article was A Modular and Diastereoselective 5 + 1 Cyclization Approach to N-(Hetero)Aryl Piperidines. And the article contained the following:

A new general de novo synthesis of pharmaceutically important N-(hetero)aryl piperidines is reported. This protocol uses a robustly diastereoselective reductive amination/aza-Michael reaction sequence to achieve rapid construction of complex polysubstituted ring systems starting from widely available heterocyclic amine nucleophiles and carbonyl electrophiles. Notably, the diastereoselectivity of this process is enhanced by the presence of water, and DFT calculations support a stereochem. model involving a facially selective protonation of a water-coordinated enol intermediate. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Electric Literature of 517-23-7

The Article related to heteroarylpiperidine diastereoselective preparation, aminoheteroarene ketoacrylate diastereoselective reductive amination aza michael reaction, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Electric Literature of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On May 18, 2021, Wang, Fenfen; Yang, Zhijun; Li, Jian; Zhang, Chi; Sun, Pingchuan published an article.Recommanded Product: 517-23-7 The title of the article was Bioinspired Polyurethane Using Multifunctional Block Modules with Synergistic Dynamic Bonds. And the article contained the following:

Nature embraces an intriguing strategy to create high-performance biomaterials, such as spider silk which presents an unparalleled combination of stiffness, tensile strength, and toughness via hierarchical structures. However, to fabricate synthetic polymers with such excellent properties remains a challenging task. Inspired by the integration of multiblock backbone and densely H-bonding assemblies in spider silk as well as the delicate iron-catecholate complexes in mussel byssus, we proposed a novel mol. design with multifunctional block modules to obtain polymer materials that exhibit excellent mech. property, self-healing ability, and reprocessability. It was achieved by introducing reversible iron-catechol (DOPA-Fe3+) crosslinks and quadruple H-bonds bearing 2-ureido-4-[1H]-pyrimidinone (UPy) dimers as multifunctional blocks into a segmented polyurethane backbone with urethane blocks and semicrystalline polycaprolactone (PCL) blocks. These two types of dynamic crosslinking knots served as the sacrificial bonds to dissipate energy efficiently under external stress burden, endowing the dual phys. crosslinked networks with increased toughness and breaking elongation. Moreover, the DOPA-Fe3+ complexes could increase the crystallization of PCL, leading to remarkably enhanced Young’s modulus and tensile strength. Solid-state NMR revealed the formation of quadruple H-bonds in UPy dimers and the presence of DOPA-Fe3+ complexes, which restricted the mobility of the mobile phase and enhanced the crystallinity of the PCL domain. This work provides a feasible way to develop bioinspired materials with self-healable and reprocessable features, in addition to balanced enhancement of both stiffness and toughness. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7

The Article related to bioinspired polyurethane multifunctional module synergistic dynamic bond, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Recommanded Product: 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Shin, Dongha; Kim, Hwa Rang; Hong, Byung Hee published an article in 2021, the title of the article was Gold nanoparticle-mediated non-covalent functionalization of graphene for field-effect transistors.SDS of cas: 517-23-7 And the article contains the following content:

Since its discovery, graphene has attracted much attention due to its unique elec. transport properties that can be applied to high-performance field-effect transistors (FETs). However, mounting chem. functionalities onto graphene inevitably involves the breaking of sp2 bonds, resulting in the degradation of the mech. and elec. properties compared to pristine graphene. Here, we report a new strategy to chem. functionalize graphene for use in FETs without affecting the elec. performance. The key idea is to control the Fermi level of the graphene using the consecutive treatment of gold nanoparticles (AuNPs) and thiol-SAM (self-assembled monolayer) mols., inducing pos. and neg. doping effects, resp., by flipping the elec. dipoles between AuNPs and SAMs. Based on this method, we demonstrate a Dirac voltage switcher on a graphene FET using heavy metal ions on functionalized graphene, where the carboxyl functional groups of the mediating SAMs efficiently form complexes with the metal ions and, as a result, the Dirac voltage can be pos. shifted by different charge doping on graphene. We believe that the nanoparticle-mediated SAM functionalization of graphene can pave the way to developing high-performance chem., environmental, and biol. sensors that fully utilize the pristine properties of graphene. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).SDS of cas: 517-23-7

The Article related to gold nanoparticle thiol graphene field effect transistor doping voltage, Electric Phenomena: Semiconductor Junctions and Devices and other aspects.SDS of cas: 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On February 1, 2020, Watanabe, Michiko; Sasaki, Takamitsu; Takeshita, Jun-ichi; Kushida, Madoka; Shimizu, Yuki; Oki, Hitomi; Kitsunai, Yoko; Nakayama, Haruka; Saruhashi, Hitomi; Ogura, Rui; Shizu, Ryota; Hosaka, Takuomi; Yoshinari, Kouichi published an article.Application of 517-23-7 The title of the article was Application of cytochrome P450 reactivity on the characterization of chemical compounds and its association with repeated-dose toxicity. And the article contained the following:

Repeated-dose toxicity (RDT) studies are one of the critical studies to assess chem. safety. There have been some studies attempting to predict RDT endpoints based on chem. substructures, but it remains very difficult to establish such a method, and a more detailed characterization of chem. compounds seems necessary. Cytochrome P450s (P450s) comprise multiple forms with different substrate specificities and play important roles in both the detoxification and metabolic activation of xenobiotics. In this study, we investigated possible use of P 450 reactivity of chem. compounds to classify the compounds A total of 148 compounds with available rat RDT test data were used as test compounds and subjected to inhibition assays against 18 human and rat P450s. Among the tested compounds, 82 compounds inhibited at least one P 450 form. Hierarchical clustering analyses using the P 450 inhibitory profiles divided the 82 compounds into nine groups, some of which showed characteristic chem. and biol. properties. Principal component analyses of the P 450 inhibition data in combination with the calculated chem. descriptors demonstrated that P 450 inhibition data were plotted differently than most chem. descriptors in the loading plots. Finally, association analyses between P 450 inhibition and RDT endpoints showed that some endpoints related to the liver, kidney and hematol. were significantly associated with the inhibition of some P450s. Our present results suggest that the P 450 reactivity profiles can be used as novel descriptors for characterizing chem. compounds for the investigation of the toxicity mechanism and/or the establishment of a toxicity prediction model. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Application of 517-23-7

The Article related to cytochrome chem compound repeated dose toxicity, chemical descriptors, cytochrome p450, enzyme inhibition, repeated-dose toxicity, toxicity prediction, Pharmacology: Drug Interactions and General Pharmacology and other aspects.Application of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xie, Haopu; Sheng, Dekun; Zhou, Yan; Xu, Shaobin; Wu, Haohao; Tian, Xinxin; Sun, Yinglu; Liu, Xiangdong; Yang, Yuming published an article in 2020, the title of the article was Thermally healable polyurethane with tailored mechanical performance using dynamic crosslinking motifs.Related Products of 517-23-7 And the article contains the following content:

Materials with self-healing abilities have gained tremendous attention in recent years but combing excellent mech. performance and splendid self-healing capacity into a single polymer material is still a great challenge. In this study, a self-healing polyurethane (SHP) material was prepared by constructing a dynamic crosslinked network via quadruple hydrogen bonds formed from 5-(2-hydroxyethyl)-6-methyl-2-aminouracil (UPy). The mech. properties of the materials could be conveniently tuned by adjusting the dynamic crosslinked d. The optimal sample, SHP-75, has excellent mech. performance, showing high tensile strength (27.02 MPa), excellent stretchability (1300%), and prominent toughness (111.37 MJ m-3). Despite such great mech. properties, SHP-75 exhibited superior self-healing abilities and could fully obtain its initial mech. strength after repairing at 80°C for 24 h. A self-healing conductive electrode was further constructed to demonstrate its application prospects in the field of sensing. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Related Products of 517-23-7

The Article related to thermally healable polyurethane tailored dynamic crosslinking motif, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.Related Products of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On April 18, 2018, Zhao, Shilin; Liu, Meng; Zhao, Liang; Zhu, Lingli published an article.COA of Formula: C6H8O3 The title of the article was Influence of Interactions among Three Biomass Components on the Pyrolysis Behavior. And the article contained the following:

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. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).COA of Formula: C6H8O3

The Article related to cellulose hemicellulose lignin biomass pyrolysis, Cellulose, Lignin, Paper, and Other Wood Products: General and other aspects.COA of Formula: C6H8O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On November 5, 2018, Wang, Jia; Xu, Chao; Zhong, Zhaoping; Deng, Aidong; Hao, Naijia; Li, Mi; Meng, Xianzhi; Ragauskas, Arthur J. published an article.Computed Properties of 517-23-7 The title of the article was Catalytic Conversion of Bamboo Sawdust over ZrO2-CeO2/γ-Al2O3 to Produce Ketonic Hydrocarbon Precursors and Furans. And the article contained the following:

A series of metal oxides including ZrO2/γ-Al2O3, CeO2/γ-Al2O3, and ZrO2-CeO2/γ-Al2O3 were synthesized and employed to conduct catalytic fast pyrolysis of bamboo sawdust via an anal. pyrolyzer/gas chromatograph/mass spectrometer (Py-GC/MS) to produce hydrocarbon precursors such as ketones and furans. Exptl. results illustrated that the use of metal oxides enhanced the formation of ketones and monoarom. hydrocarbons compared to catalyst-free trial. Among the metal oxides, ZrO2-CeO2/γ-Al2O3 exhibited the most significant ketonization and aldol condensation activities yielding the highest concentration of linear and cyclic ketones. In addition, nonacidic oxygenates such as furfural, acetol, butanedial, 2,3-dihydrobenzofuran, and Me acetate, were efficiently converted into hydrocarbon precursors over metal oxides. A dual catalytic bed system integrating ZrO2-CeO2/γ-Al2O3 and HZSM-5 significantly facilitated the production of aromatic hydrocarbons compared to pure HZSM-5 catalytic run. The use of ZrO2-CeO2/γ-Al2O3 mixed with HZSM-5 mode maximized the formation of xylenes, while ZrO2-CeO2/γ-Al2O3 mixed with bamboo sawdust catalytic trial increased the concentration of benzene, toluene, and alkylbenzenes. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Computed Properties of 517-23-7

The Article related to bamboo sawdust conversion zirconia ceria alumina ketonic hydrocarbon furan, Cellulose, Lignin, Paper, and Other Wood Products: General and other aspects.Computed Properties of 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On July 18, 2018, Li, Mei; Zhang, Rongchun; Li, Xiaohui; Wu, Qiang; Chen, Tiehong; Sun, Pingchuan published an article.Recommanded Product: 517-23-7 The title of the article was High-performance recyclable cross-linked polyurethane with orthogonal dynamic bonds: The molecular design, microstructures, and macroscopic properties. And the article contained the following:

Polyurethane materials (PUs) have been widely used in industry and daily life due to the versatile chem. However, despite the rapid advance in synthetic chem., it still remains a significant challenge for the facile fabrication of PUs with a single crosslinked network embedded with excellent mech. properties and recyclability. Herein, in this study, we proposed a simple strategy to fabricate a high-performance recyclable crosslinked PU and revealed the relationship between microscopic structure and macroscopic properties. The UPy (2-ureido-4-[1H]-pyrimidione) motifs were incorporated into the backbone chains of PUs, where the quadruple hydrogen bonding interactions between UPy dimers can significantly enhance the mech. strength and toughness. Furthermore, a single small mol. Diels-Alder adduct was utilized as the chem. crosslinker, rendering the final crosslinked PUs healable and recyclable. The thermal reversibility of the Diels-Alder reaction was well verified by DSC and solid-state NMR spectroscopy. Notably, it was found that the incorporation of UPy motifs could enhance the strain-induced crystallization (SIC), leading to a large stress at break. The structural and dynamic changes induced by SIC were quant. addressed by proton multiple-quantum NMR spectroscopy and SAXS experiments, where SIC further imposed restrictions on the mobility of surrounding polymer chains in the soft domain and led to the change of microphase separated nanostructures. Overall, a simple strategy is proposed here for the facile fabrication of high performance recyclable PUs, and the detailed investigation here on the structure-property relationship may further provide insights into developing high performance polymeric materials. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7

The Article related to recyclable polyurethane orthogonal dynamic bond design microstructure, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.Recommanded Product: 517-23-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics