Tag: 100-200

Hu, Huayou; Li, Guodong; Gu, Ning; Gu, Min published an article in 2016, the title of the article was Synthesis of 3-unsubstituted indolizines from electron deficient alkenes under transition metal free conditions.HPLC of Formula: 93476-46-1 And the article contains the following content:

3-Unsubstituted indolizine not only exhibits a variety of important biol. activities, but also is a kind of important intermediate in organic synthesis. A transition metal free method for synthesizing 3-unsubstituted indolizines from pyridines, 2-chloroacetic acid and electron deficient alkenes has been invented in this paper. The designed products were obtained via oxidative dehydrogenation and decarboxylation reactions, and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) was used as an oxidant. This method featured simple procedure, easy available starting materials and transition metal free conditions. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).HPLC of Formula: 93476-46-1

The Article related to indolizine preparation electron deficient alkene dehydroaromatization, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.HPLC of Formula: 93476-46-1

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

On March 20, 2013, Zhao, Baoli; Cheng, Kai; Fan, Shaolou published a patent.COA of Formula: C11H11NO2 The title of the patent was Preparation of indolizine derivatives as antitumor agents. And the patent contained the following:

Title compounds I [wherein R1 = alkyl, thienyl, or (un)substituted phenyl; R2 = CN, C(O)OEt, or C(O)OBu], and their pharmaceutically acceptable salts thereof, were prepared as antitumor agents. Thus, the invention compound I (R1 = 4-OMe-Ph; R2 = CN) was prepared via reaction of 1-indolizinecarbonitrile with 4-methoxybenzaldehyde in 96% yield. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).COA of Formula: C11H11NO2

The Article related to indolizine derivative preparation antitumor, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.COA of Formula: C11H11NO2

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

On November 12, 2008, You, Shuli; Xia, Jibao published a patent.Computed Properties of 93476-46-1 The title of the patent was A process for preparing 3,3′-biindolizine compounds. And the patent contained the following:

The invention relates to a process for the preparation of 3,3′-biindolizine derivatives I, wherein R1 and R2 are independently H, (un)substituted alkyl, NH2, etc. For instance, the invention compound II was prepared by dimerization of 1-indolizinecarboxylic acid Me ester in the presence of Pd(OAc)2, Cu(OAc)2, and K2CO3. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).Computed Properties of 93476-46-1

The Article related to biindolizine preparation dimerization, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Computed Properties of 93476-46-1

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

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 January 12, 2022, Zhang, Jiajun; Paladugu, Srinivas R.; Gillard, Rachel M.; Sarkar, Anindya; Boger, Dale L. published an article.Quality Control of Methyl 2-cyclopentanonecarboxylate 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 Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Quality Control of Methyl 2-cyclopentanonecarboxylate

The Article related to vindoline ketoester tris bromophenylaminium hexachloroantimonate regioselective radical coupling, Alkaloids: Alkaloids Containing Two Nitrogen Atoms and other aspects.Quality Control of Methyl 2-cyclopentanonecarboxylate

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

On September 1, 2021, Mulero, A.; Cachadina, I.; Vegas, A. published an article.Related Products of 123-25-1 The title of the article was Recommended Correlations for the Surface Tension of 80 Esters. And the article contained the following:

Surface tension values for 80 esters have been compiled from databases, books, and papers in the literature. The data have been carefully screened and selected, and the final dataset for each fluid has been fitted as a function of the temperature by using the Guggenheim-Katayama model, which requires two or four adjustable coefficients for each fluid. As a result, recommended correlations are proposed for each of the 80 esters, providing mean absolute deviations below 0.55 mN/m, mean absolute percentage deviations below 2.2%, and percentage deviations below 10% except for 3 data out of 1846 selected. These correlations are added to the collection of those previously proposed for different kinds of fluids, including common fluids, alcs., refrigerants, organic acids, and n-alkanes. (c) 2021 American Institute of Physics. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Related Products of 123-25-1

The Article related to surface tension ester fluid, Surface Chemistry and Colloids: Liquid-Gas Systems and other aspects.Related Products of 123-25-1

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 May 17, 2021, Kurka, Dustin Werner; Niehues, Maximilian; Kudruk, Sergej; Gerke, Volker; Ravoo, Bart Jan published an article.Related Products of 6038-19-3 The title of the article was Polythiolactone-Decorated Silica Particles: A Versatile Approach for Surface Functionalization, Catalysis and Encapsulation. And the article contained the following:

The surface chem. of colloidal silica has tremendous effects on its properties and applications. Commonly the design of silica particles is based on their de novo synthesis followed by surface functionalization leading to tailormade properties for a specific purpose. Here, the design of robust “precursor” polymer-decorated silica nano- and microparticles is demonstrated, which allows for easy post-modification by polymer embedded thiolactone chem. To obtain this organic-inorganic hybrid material, silica particles (SiO2P) were functionalized via surface-initiated atom transfer radical polymerization (SI-ATRP) with poly(2-hydroxyethyl acrylate) (PHEA)-poly(thiolactone acrylamide (PThlAm) co-polymer brushes. Exploiting the versatility of thiolactone post-modification, a system was developed that could be used in three exemplary applications: 1) the straightforward mol. post-functionalization to tune the surface polarity, and therefore the dispersibility in various solvents; 2) the immobilization of metal nanoparticles into the polymer brushes via the in situ formation of free thiols that preserved catalytic activity in a model reaction; 3) the formation of redox-responsive, permeable polymer capsules by crosslinking the thiolactone moieties with cystamine dihydrochloride (CDH) followed by dissolution of the silica core. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Related Products of 6038-19-3

The Article related to polythiolactone silica particle surface functionalization catalysis encapsulation, nanoparticles, polymer brushes, silica, surface functionalization, thiolactones, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Related Products of 6038-19-3

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 20, 2022, Gaertner, Cornelius V.; Schneider, Christoph published an article.Reference of Methyl 2-cyclopentanonecarboxylate The title of the article was Enantioselective Annulation of α,β-Unsaturated N-Acyliminium Ions with β-Keto Ester Enolates via Cooperative Palladium and Bronsted Acid Catalysis. And the article contained the following:

Authors herein report a cooperative palladium- and Bronsted acid-catalyzed strategy toward the first enantioselective annulation of in situ generated α,β-unsaturated N-acyliminium ions with chiral metal enolates. Novel polycyclic oxoisoindoles featuring three contiguous stereogenic centers have been obtained with typically good yields, outstanding enantiocontrol, and moderate to good diastereoselectivity. The utility of the process was further demonstrated by their conversion to synthetically valuable scaffolds. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Reference of Methyl 2-cyclopentanonecarboxylate

The Article related to polycyclic oxoisoindole preparation enantioselective diastereoselective, hydroxy styrylisoindolinone keto ester enolate annulation, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Reference of Methyl 2-cyclopentanonecarboxylate

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