Tag: 200-300

On April 8, 2004, Leatherdale, Catherine A.; Schardt, Craig R.; Thompson, D. Scott; Thompson, Wendy L. published a patent.Application In Synthesis of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene The title of the patent was Multiphoton photoreactive compositions with inorganic particles and fabricating three-dimensional structures. And the patent contained the following:

A multiphoton reactive composition includes (a) â‰? reactive species; and (b) multi-photon photoinitiator system; and (c) a plurality of substantially inorganic particles, wherein the particles have an average particle size of â‰?0 μ in diameter The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Application In Synthesis of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene

The Article related to oxide epoxy nanocomposite photoreactive fabrication three dimensional structure, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.Application In Synthesis of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene

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On February 21, 2014, Cheng, Chen; Hartwig, John F. published an article.Application of 1417036-28-2 The title of the article was Rhodium-Catalyzed Intermolecular C-H Silylation of Arenes with High Steric Regiocontrol. And the article contained the following:

Regioselective C-H functionalization of arenes has widespread applications in synthetic chem. The regioselectivity of these reactions is often controlled by directing groups or steric hindrance ortho to a potential reaction site. Here, authors report a catalytic intermol. C-H silylation of unactivated arenes that manifests very high regioselectivity through steric effects of substituents meta to a potential site of reactivity. The silyl moiety can be further functionalized under mild conditions but is also inert toward many common organic transformations, rendering the silylarene products useful building blocks. The remote steric effect that we observe results from the steric properties of both the rhodium catalyst and the silane. The experimental process involved the reaction of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1417036-28-2).Application of 1417036-28-2

The Article related to rhodium catalyzed intermol carbon hydrogen silylation arene steric regiocontrol, Organometallic and Organometalloidal Compounds: Silicon Compounds and other aspects.Application of 1417036-28-2

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On August 12, 2014, Resta, Claudio; Di Pietro, Sebastiano; Majeric Elenkov, Maja; Hamersak, Zdenko; Pescitelli, Gennaro; Di Bari, Lorenzo published an article.COA of Formula: C15H24O2 The title of the article was Consequences of Chirality on the Aggregation Behavior of Poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV). And the article contained the following:

Poly[2-methoxy-5(2′-ethylhexoxy)-p-phenylenevinylene] (MEH-PPV) has been for the first time prepared and fully characterized in enantiopure (R) form. If the polymer mol. weight is sufficiently low, (R)-MEH-PPV assumes a helical supramol. structure in the solution aggregates, with consequences on the tendency to aggregation and on the fluorescence quenching, both of which are reduced with respect to the racemic analog. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).COA of Formula: C15H24O2

The Article related to chirality effect aggregation poly methoxy ethylhexyloxy phenylenevinylene, Physical Properties of Synthetic High Polymers: Polymer Structure and other aspects.COA of Formula: C15H24O2

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Karmel, Caleb; Rubel, Camille Z.; Kharitonova, Elena V.; Hartwig, John F. published an article in 2019, the title of the article was Iridium-catalyzed silylation of five-membered heteroarenes: high sterically derived selectivity from a pyridyl-imidazoline ligand.Name: 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane And the article contains the following content:

The steric effects of substituents on five-membered rings are less pronounced than those on six-membered rings because of the difference in bond angles. Thus, the regioselectivities of reactions that occur with selectivities dictated by steric effects, such as the borylation of C-H bonds, have been poor in many cases. We report that the silylation of five-membered ring heteroarenes occurs with high sterically derived regioselectivity when catalyzed by the combination of [Ir(cod)(OMe)]2 and a phenanthroline ligand or a new pyridylimidazoline ligand that further increases the regioselectivity. The silylation reactions with these catalysts produce high yields of heteroarylsilanes from functionalization at the most sterically accessible C-H bonds of these rings under conditions that the borylation of C-H bonds with previously reported catalysts formed mixtures of products or products that are unstable. The heteroarylsilane products undergo cross-coupling reactions and substitution reactions with ipso selectivity to generate heteroarenes that bear halogen, aryl and perfluoroalkyl substituents. The experimental process involved the reaction of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1073339-22-6).Name: 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

The Article related to heteroarene heptamethyltrisiloxane bispinacolatodiboron iridium catalyst pyridyl imidazoline ligand, regioselective chemoselective silylation borylation hiyama coupling, Heterocyclic Compounds (One Hetero Atom): Other 5-Membered Rings and other aspects.Name: 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

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Li, Qiao; Cai, Yun; Hu, Yuanyuan; Jin, Hongwei; Chen, Fener; Liu, Yunkui; Zhou, Bingwei published an article in 2021, the title of the article was Nickel-catalyzed cyclization of 1,7-enynes for the selective synthesis of dihydrocyclobuta[c]quinolin-3-ones and benzo[b]azocin-2-ones.Reference of 2-((4-Methoxyphenyl)ethynyl)aniline And the article contains the following content:

A nickel-catalyzed cyclization of N-(o-ethynylaryl)acrylamides for selective syntheses of dihydrocyclobuta[c]quinolin-3-ones I [R1 = Ph, 2-MeOC6H4, 4-ClC6H4, etc.; R2 = H, Me, Ph; R3 = Me, Et, Bn, methoxymethyl; R4 = H, 7-Me, 6-Cl, etc.] and benzo[b]azocin-2-ones II [R5 = Ph, 4-MeC6H4, 3-thienyl, etc.; R6 = H, Me, Ph; R7 = Me, Bn, methoxymethyl; R8 = H, 8-Me, 8-CN, etc.] was reported. The two varied products I and II could be easily obtained by tuning the reaction temperature This reaction featured easy temperature-control, high efficiency and gram-scale synthesis. The experimental process involved the reaction of 2-((4-Methoxyphenyl)ethynyl)aniline(cas: 157869-15-3).Reference of 2-((4-Methoxyphenyl)ethynyl)aniline

The Article related to dihydrocyclobutaquinolinone chemoselective preparation, enyne cyclization nickel catalyst, benzoazocinone chemoselective preparation, cyclization enyne nickel catalyst, Heterocyclic Compounds (One Hetero Atom): Higher-Membered Rings and other aspects.Reference of 2-((4-Methoxyphenyl)ethynyl)aniline

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On April 22, 2015, Saito, Yutaro; Segawa, Yasutomo; Itami, Kenichiro published an article.Category: ethers-buliding-blocks The title of the article was para-C-H Borylation of benzene derivatives by a bulky iridium catalyst. And the article contained the following:

A highly para-selective aromatic C-H borylation has been accomplished. By a new iridium catalyst bearing a bulky diphosphine ligand, Xyl-MeO-BIPHEP, the C-H borylation of monosubstituted benzenes can be affected with para-selectivity up to 91%. This catalytic system is quite different from the usual iridium catalysts that cannot distinguish meta- and para-C-H bonds of monosubstituted benzene derivatives, resulting in the preferred formation of meta-products. The para-selectivity increases with increasing bulkiness of the substituent on the arene, indicating that the regioselectivity of the present reaction is primarily controlled by steric repulsion between substrate and catalyst. Caramiphen, an anticholinergic drug used in the treatment of Parkinson’s disease, was converted into five derivatives via our para-selective borylation. The present [Ir(cod)OH]2/Xyl-MeO-BIPHEP catalyst represents a unique, sterically controlled, para-selective, aromatic C-H borylation system that should find use in streamlined, predictable chem. synthesis and in the rapid discovery and optimization of pharmaceuticals and materials. The experimental process involved the reaction of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1417036-28-2).Category: ethers-buliding-blocks

The Article related to boration monosubstituted benzene para selective iridium biphep catalyst, arylboronic ester preparation para selective boration aromatic substitution, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.Category: ethers-buliding-blocks

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Cheng, Cang; Zuo, Xiang; Tu, Dongdong; Wan, Bin; Zhang, Yanghui published an article in 2021, the title of the article was Palladium-catalyzed diastereoselective cross-coupling of two aryl halides via C-H activation: synthesis of chiral eight-membered nitrogen heterocycles.Category: ethers-buliding-blocks And the article contains the following content:

A method for the synthesis of enantiopure eight-membered nitrogen heterocycles, e.g., I was developed through diastereoselective cross-coupling of 2-iodobiphenyls with 2-bromobenzylamines. The products represented a novel type of chiral scaffold, which feature easy modification and high configurative stability and had the potential to be applied in asym. synthesis. Palladacycles that were formed via the C-H activation of 2-iodobiphenyls should act as the intermediates. The reaction provided a new strategy for the synthesis of medium-sized ring compounds The experimental process involved the reaction of (2-Bromo-5-methoxyphenyl)methanamine(cas: 887581-09-1).Category: ethers-buliding-blocks

The Article related to chiral eight membered nitrogen heterocycle diastereoselective preparation, aryl halide ch activation palladium catalyst cross coupling, Heterocyclic Compounds (One Hetero Atom): Higher-Membered Rings and other aspects.Category: ethers-buliding-blocks

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Tajuddin, Hazmi; Harrisson, Peter; Bitterlich, Bianca; Collings, Jonathan C.; Sim, Neil; Batsanov, Andrei S.; Cheung, Man Sing; Kawamorita, Soichiro; Maxwell, Aoife C.; Shukla, Lena; Morris, James; Lin, Zhenyang; Marder, Todd B.; Steel, Patrick G. published an article in 2012, the title of the article was Iridium-catalyzed C-H borylation of quinolines and unsymmetrical 1,2-disubstituted benzenes: insights into steric and electronic effects on selectivity.Reference of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane And the article contains the following content:

Borylation of quinolines provides an attractive method for the late-stage functionalization of this important heterocycle. The regiochem. of this reaction is dominated by sterptsic factors but, by undertaking reactions at room temperature, an underlying electronic selectivity becomes apparent, as exemplified by the comparative reactions of 7-halo-2-methylquinoline and 2,7-dimethylquinoline which afford variable amounts of the 5- and 4-borylated products. Similar electronic selectivities are observed for nonsym. 1,2-disubstituted benzenes. The site of borylation can be simply estimated by anal. of the 1H NMR spectrum of the starting material with preferential borylation occurring at the site of the most deshielded sterically accessible H or C atom. Such effects can be linked with C-H acidity. While DFT calculations of the pKa for the C-H bond show good correlation with the observed selectivity, small differences suggest that related alternative, but much more computationally demanding values, such as the M-C bond strength, may be better quant. predictors of selectivity. The experimental process involved the reaction of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1417036-28-2).Reference of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

The Article related to quinoline derivative borylation iridium catalyst regiochem steric electronic effect, mol structure borylated quinoline preparation, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.Reference of 2-(3-Methoxy-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

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On April 7, 2021, Hoque, Emdadul Md; Hassan, Mirja Mahamudul Md; Chattopadhyay, Buddhadeb published an article.Product Details of 1073339-22-6 The title of the article was Remarkably Efficient Iridium Catalysts for Directed C(sp2)-H and C(sp3)-H Borylation of Diverse Classes of Substrates. And the article contained the following:

Here we describe the discovery of a new class of C-H borylation catalysts and their use for regioselective C-H borylation of aromatic, heteroaromatic, and aliphatic systems. The new catalysts have Ir-C(thienyl) or Ir-C(furyl) anionic ligands instead of the diamine-type neutral chelating ligands used in the standard C-H borylation conditions. It is reported that the employment of these newly discovered catalysts show excellent reactivity and ortho-selectivity for diverse classes of aromatic substrates with high isolated yields. Moreover, the catalysts proved to be efficient for a wide number of aliphatic substrates for selective C(sp3)-H bond borylations. Heterocyclic mols. are selectively borylated using the inherently elevated reactivity of the C-H bonds. A number of late-stage C-H functionalization have been described using the same catalysts. Furthermore, we show that one of the catalysts could be used even in open air for the C(sp2)-H and C(sp3)-H borylations enabling the method more general. Preliminary mechanistic studies suggest that the active catalytic intermediate is the Ir(bis)boryl complex, and the attached ligand acts as bidentate ligand. Collectively, this study underlines the discovery of new class of C-H borylation catalysts that should find wide application in the context of C-H functionalization chem. The experimental process involved the reaction of 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane(cas: 1073339-22-6).Product Details of 1073339-22-6

The Article related to directed ch borylation aromatic heterocyclic compound iridium cyclooctadiene catalyst, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.Product Details of 1073339-22-6

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On March 18, 2004, Whiteford, Jeffery A.; Buretea, Mihai A.; Scher, Erik C. published a patent.Related Products of 146370-51-6 The title of the patent was Organic species that facilitate charge transfer to or from nanostructures. And the patent contained the following:

The present invention provides compositions (small mols., oligomers and polymers) that can be used to modify charge transport across a surface or a nanostructure (e.g., nanocrystal) surface, or within a nanostructure (e.g., nanocrystal)containing matrix, as well as methods for making and using the novel compositions The compositions contain a conjugated organic species and at least one binding group capable of interacting with a nanostructure (e.g., nanocrystal) surface; during use, the compositions are coupled via the binding group to the nanostructure (e.g., nanocrystal) surface, such that the compositions are substantially conductive to electrons and/or holes being transported by/through the nanostructure (e.g., nanocrystal) (e.g., during the process of extracting or injecting the electrons or holes). The compositions of the present invention can optionally be derivatized with addnl. chem. groups, e.g., to enhance the electronic conjugation of the core organic species, to couple adjacent nanostructures (e.g., nanocrystals), or to facilitate dispersion, mixing and/or blending of nanostructures (e.g., nanocrystals) in various matrixes. In one aspect, the present invention provides conductive compositions for modification of charge transport across a nanostructure (e.g., nanocrystal)containing matrix. The conductive composition typically include (1) a conjugated organic moiety as the body structure, or core of the conductive mol.; (2) a nanostructure (e.g., nanocrystal) binding head group coupled to the body structure at a 1st position on the conjugated organic moiety; and (3) a tail group coupled to the body structure at a 2nd position on the conjugated organic moiety. After formation of an exciton in the nanostructure (e.g., nanocrystal) containing matrix, the conductive composition facilitates the injection and/or extraction of charge (electron and/or hole) with respect to the attached nanostructure, thereby modifying charge transport across a nanostructure-containing matrix. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Related Products of 146370-51-6

The Article related to charge transfer mol electronic device nanocrystal, Electric Phenomena: Conductors, Semiconductors, Resistors, Contacts and other aspects.Related Products of 146370-51-6

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