Tag: M.W=900-1000

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Shen, Yangyang; Cornella, Josep; Julia-Hernandez, Francisco; Martin, Ruben researched the compound: [Ir(dtbbpy)(ppy)2]PF6( cas:676525-77-2 ).Related Products of 676525-77-2.They published the article 《Visible-Light-Promoted Atom Transfer Radical Cyclization of Unactivated Alkyl Iodides》 about this compound( cas:676525-77-2 ) in ACS Catalysis. Keywords: unactivated alkyl iodide visible light iridium; cyclopentylidene iodoalkane preparation mol crystal structure; iridium atom transfer radical cyclization photocatalyst; visible light atom transfer radical cyclization promoter. We’ll tell you more about this compound (cas:676525-77-2).

A visible-light-mediated atom transfer radical cyclization of unactivated alkyl iodides is described. This protocol operates under mild conditions and exhibits high chemoselectivity profile while avoiding parasitic hydrogen atom transfer pathways. Preliminary mechanistic studies challenge the perception that a canonical photoredox catalytic cycle is being operative. A variety of cyclopentylidene iodoalkane derivatives, e.g., I (X-ray single crystal structure shown), and related compounds were prepared by this methodol.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Recommanded Product: 676525-77-2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: [Ir(dtbbpy)(ppy)2]PF6, is researched, Molecular C40H40F6IrN4P, CAS is 676525-77-2, about Stable Green Electroluminescence from an Iridium Tris-Heteroleptic Ionic Complex. Author is Tordera, Daniel; Delgado, Manuel; Orti, Enrique; Bolink, Henk J.; Frey, Julien; Nazeeruddin, Khaja Md.; Baranoff, Etienne.

An ionic tris-heteroleptic iridium complex gives green light-emitting electrochem. cells (LECs) with unprecedented performances for this part of the visible spectrum. The devices are very bright (>1000 cd m-2), efficient (∼3%), and stable (>55 h). The novel complex is prepared using a new and efficient synthetic procedure. We show that there is a mixed orbital formation originating from the two different orthometalating ligands resulting in photophys. properties that lie between those of its two bis-heteroleptic analogs. Therefore, tris-heteroleptic complexes provide new avenues for fine-tuning the emission properties and to bridge gaps between a series of bis-heteroleptic complexes.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Name: [Ir(dtbbpy)(ppy)2]PF6. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: [Ir(dtbbpy)(ppy)2]PF6, is researched, Molecular C40H40F6IrN4P, CAS is 676525-77-2, about Spin-Selective Generation of Triplet Nitrenes: Olefin Aziridination through Visible-Light Photosensitization of Azidoformates. Author is Scholz, Spencer O.; Farney, Elliot P.; Kim, Sangyun; Bates, Desiree M.; Yoon, Tehshik P..

Azidoformates are interesting potential nitrene precursors, but their direct photochem. activation can result in competitive formation of aziridination and allylic amination products. Herein, the authors show that visible-light-activated transition-metal complexes can be triplet sensitizers that selectively produce aziridines through the spin-selective photogeneration of triplet nitrenes from azidoformates. This approach enables the aziridination of a wide range of alkenes and the formal oxyamination of enol ethers using the alkene as the limiting reagent. Preparative-scale aziridination can be easily achieved under continuous-flow conditions. Under optimized conditions the synthesis of the target compounds was achieved using [4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine-κN1,κN1′]bis[2-(2-pyridinyl-κN)phenyl-κC]iridium(1+) hexafluorophosphate(1-) as a catalyst. Starting materials included (azido)formic acid 2-chloroethyl ester (i.e., azidoformate) and alkenes, such as cyclohexene, cyclopentene, cycloheptene, (ethenyl)benzene (i.e., styrene). The title compounds thus formed included 7-Azabicyclo[4.1.0]heptane-7-carboxylic acid 2,2,2-trichloroethyl ester derivatives (i.e., aziridine derivatives). Reaction products from 1,1′-[(1α,2α,3β)-3-ethenyl-1,2-cyclopropanediyl]bis[benzene], (4E)-4-octene, (4Z)-4-octene with (azido)formic acid 2-chloroethyl ester were also reported.

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Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Recommanded Product: [Ir(dtbbpy)(ppy)2]PF6. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: [Ir(dtbbpy)(ppy)2]PF6, is researched, Molecular C40H40F6IrN4P, CAS is 676525-77-2, about Synthesis of oxindoles via visible light photoredox catalysis. Author is Ju, Xuhui; Liang, Yan; Jia, Pingjing; Li, Weifei; Yu, Wei.

2-Electron-withdrawing-group-substituted 2-bromoanilides can be converted to the corresponding 3,3-disubstituted oxindoles with high efficiency under visible light irradiation by using fac-Ir(ppy)3 as the photoredox catalyst. This protocol is suitable for the synthesis of oxindoles with chloro and bromo atoms attached to the Ph ring.

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Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Application of 676525-77-2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: [Ir(dtbbpy)(ppy)2]PF6, is researched, Molecular C40H40F6IrN4P, CAS is 676525-77-2, about Regiospecific Intermolecular Aminohydroxylation of Olefins by Photoredox Catalysis. Author is Miyazawa, Kazuki; Koike, Takashi; Akita, Munetaka.

A simple and regiospecific aminohydroxylation of olefins by photoredox catalysis has been developed. N-protected 1-aminopyridinium salts are the key compounds and serve as amidyl radical precursors by the action of Ir photocatalysts, fac-[Ir(ppy)3] and [Ir(ppy)2(dtbbpy)](PF6) (ppy=2-pyridylphenyl, dtbbpy=4,4′-di-tert-butyl-2,2′-bipyridine). The present photocatalytic system allows for synthesis of vicinal aminoalc. derivatives from olefins with various functional groups under mild reaction conditions with easy handling.

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Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Qin, Qixue; Yu, Shouyun published the article 《Visible-Light-Promoted Remote C(sp3)-H Amidation and Chlorination》. Keywords: chlorosulfonamide carbon hydrogen bond amidation chlorination visible light promoted; nitrogen heterocycle preparation; alkyl chloride preparation.They researched the compound: [Ir(dtbbpy)(ppy)2]PF6( cas:676525-77-2 ).Computed Properties of C40H40F6IrN4P. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:676525-77-2) here.

A visible-light-promoted C(sp3)-H amidation and chlorination of N-chlorosulfonamides (NCSs) is reported. This remote C(sp3)-H functionalization can be achieved in weak basic solution at room temperature with as little as 0.1 mol % of a photocatalyst. A variety of nitrogen-containing heterocycles (up to 94% yield) and chlorides (up to 93% yield) are prepared from NCSs. Late-stage C(sp3)-H functionalization of complex and biol. important (-)-cis-myrtanylamine and (+)-dehydroabietylamine derivatives can also be achieved with excellent yields and regioselectivity.

Compound(676525-77-2)Computed Properties of C40H40F6IrN4P received a lot of attention, and I have introduced some compounds in other articles, similar to this compound([Ir(dtbbpy)(ppy)2]PF6), if you are interested, you can check out my other related articles.

Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Tucker, Joseph W.; Stephenson, Corey R. J. published the article 《Tandem Visible Light-Mediated Radical Cyclization-Divinylcyclopropane Rearrangement to Tricyclic Pyrrolidinones》. Keywords: visible light radical cyclization bromocyclopropylderivative divinylcyclopropane rearrangement; tricyclic pyrrolidinone preparation.They researched the compound: [Ir(dtbbpy)(ppy)2]PF6( cas:676525-77-2 ).Reference of [Ir(dtbbpy)(ppy)2]PF6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:676525-77-2) here.

Visible light promoted single electron reduction of bromocyclopropyl cyclization scaffolds enabled by photoredox catalysis initiates a novel tandem radical cyclization/sigmatropic rearrangement to generate tricyclic pyrrolidinones having considerable mol. complexity, e.g. I, from simple, readily available starting materials. Furthermore, subtle variations to substrate structure afford a wide array of reaction diversity.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: [Ir(dtbbpy)(ppy)2]PF6, is researched, Molecular C40H40F6IrN4P, CAS is 676525-77-2, about Accelerated luminophor discovery through combinatorial synthesis.Synthetic Route of C40H40F6IrN4P.

A method for accelerating the discovery of ionic luminophors using combinatorial techniques is reported. The photophys. properties of the resulting transition-metal-based chromophores were compared against analogous, traditionally prepared species. The strong overlap between these two sets confirms the identity of the parallel synthesis products and supports the truthfulness of the combinatorial results. Further support for the combinatorial method comes from the adherence of these complexes to the energy gap law. The relation between the structure of a complex and its photophys. properties was also considered, and static DFT calculations were used to assess whether it is feasible to predict the luminescent behavior of novel materials.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Yasu, Yusuke; Koike, Takashi; Akita, Munetaka published the article 《Visible Light-Induced Selective Generation of Radicals from Organoborates by Photoredox Catalysis》. Keywords: visible light photoredox catalyst radical photogeneration organoborate derivative; photocatalyst photogeneration radical organic borate.They researched the compound: [Ir(dtbbpy)(ppy)2]PF6( cas:676525-77-2 ).Formula: C40H40F6IrN4P. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:676525-77-2) here.

A new strategy for the generation of carbon-centered radicals via oxidation of alkyl-, allyl-, benzyl- and arylborates by visible-light-driven single electron transfer (SET) photoredox catalysis has been established. The generated radicals smoothly react with TEMPO and electron-deficient alkenes to afford C-O and C-C coupling products, resp. In this radical initiating system, cyclic organo(triol)borates turn out to be useful radical precursors.

In some applications, this compound(676525-77-2)Formula: C40H40F6IrN4P is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: [Ir(dtbbpy)(ppy)2]PF6(SMILESS: [F-][P+5]([F-])([F-])([F-])([F-])[F-].CC(C)(C1=CC=[N]([Ir+3]23([C-]4=CC=CC=C4C5=CC=CC=[N]25)([C-]6=CC=CC=C6C7=CC=CC=[N]37)[N]8=CC=C(C(C)(C)C)C=C98)C9=C1)C,cas:676525-77-2) is researched.Computed Properties of C7H6BrI. The article 《Large Improvement in the Catalytic Activity Due to Small Changes in the Diimine Ligands: New Mechanistic Insight into the Dirhodium(II,II) Complex-Based Photocatalytic H2 Production》 in relation to this compound, is published in Inorganic Chemistry. Let’s take a look at the latest research on this compound (cas:676525-77-2).

Two dirhodium(II) complexes, [RhII2(μ-O2CCH3)2(bpy)2](O2CCH3)2 (Rh2bpy2; bpy = 2,2′-bipyridine) and [RhII2(μ-O2CCH3)2(phen)2](O2CCH3)2 (Rh2phen2; phen = 1,10-phenanthroline) were synthesized, and their photocatalytic H2 production activities were studied in multicomponent systems, containing [IrIII(ppy)2(dtbbpy)]+ (ppy = 2-phenylpyridine, dtbbpy = 4,4′-di-tert-butyl-2,2′-bipyridine) as the photosensitizer (PS) and triethylamine as the sacrificial reductant (SR). There is a more than 6-fold increase in the photocatalytic activity from Rh2bpy2 to Rh2phen2 just using phen in place of bpy. A turnover number as high as 2622 was obtained after 50 h of irradiation of a system containing 16.7 μM Rh2phen2, 50 μM PS, and 0.6 M SR. The electrochem., luminescence quenching, and transient absorption experiments demonstrate that RhIRhI is the true catalyst for the proton reduction The real-time absorption spectra confirm that a new Rh-based species formed upon irradiation of the Rh2phen2-based multicomponent system, which exhibits an absorption centered at ∼575 nm. This 575-nm intermediate may account for the much higher H2 evolution efficiency of Rh2phen2. The authors work highlights the importance of N-based chelate ligands and opens a new avenue for pursuing more efficient RhII2-based complexes in photocatalytic H2 production application.

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Reference:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”