Category: ruthenium-catalysts

SDS of cas: 60804-74-2. 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: Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate), is researched, Molecular C30H24F12N6P2Ru, CAS is 60804-74-2, about Visible-light photoredox-promoted desilylative allylation of α-silylamines: An efficient route to synthesis of homoallylic amines. Author is Fan, Lulu; Cheng, Fukun; Zhang, Tingting; Liu, Guoxing; Yuan, Jinwei; Mao, Pu.

A facile and efficient synthesis of homoallylic amines by visible-light photoredox-promoted desilylative allylation of α-silylamines with allylic sulfones is described. A variety of α-silylamines derived from anilines, cyclic and acyclic alkyl amines reacted with a serious of mono or disubstituted allylic sulfones well to provide homoallylic amines in good to high yields under very mild reaction conditions.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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.Huang, En-He; Zhang, Zhi-Xin; Ye, Si-Han; Chen, Yang-Bo; Luo, Wen-Feng; Qian, Peng-Cheng; Ye, Long-Wu researched the compound: Copper(I) tetra(acetonitrile) tetrafluoroborate( cas:15418-29-8 ).Category: ruthenium-catalysts.They published the article 《Copper-Catalyzed Carbocyclization of Silyl Enol Ether Tethered Ynamides for Efficient and Practical Synthesis of 2-Azabicyclo[3.2.0] Compounds》 about this compound( cas:15418-29-8 ) in Chinese Journal of Chemistry. Keywords: azabicyclo compound preparation regioselective diastereoselective; silyl enol ether ynamide carbocyclization copper catalyst. We’ll tell you more about this compound (cas:15418-29-8).

An efficient copper-catalyzed carbocyclization of silyl enol ether tethered ynamides has been developed, allowing rapid and practical construction of diverse 2-azabicyclo[3.2.0] compounds I (PG = Ts, 4-bromobenzenesulfonyl, 4-methoxybenzenesulfonyl; R = C6H5, 4-FC6H4, hexyl, etc.). in generally good to excellent yields with broad substrate scope under mild reaction conditions. Importantly, this protocol not only constitutes a rare example of non-noble metal-catalyzed alkyne carbocyclization, but also represents a rare cyclization on the β-position of π-tethered ynamides. The possibility of asym. carbocyclization via kinetic resolution also emerges.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate), is researched, Molecular C30H24F12N6P2Ru, CAS is 60804-74-2, about Tuning Triplet Energy Transfer of Hydroxamates as the Nitrene Precursor for Intramolecular C(sp3)-H Amidation, the main research direction is hydroxamate nitrene precursor intramol amidation triplet energy transfer; oxazolidinone synthesis; gamma lactam synthesis.Safety of Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate).

Reported herein is the design of a photosensitization strategy to generate triplet nitrenes and its applicability for the intramol. C-H amidation reactions. Substrate optimization by tuning phys. organic parameters according to the proposed energy transfer pathway led us to identify hydroxamates as a convenient nitrene precursor. While more classical nitrene sources, representatively organic azides, were ineffective under the current photosensitization conditions, hydroxamates, which are readily available from alcs. or carboxylic acids, are highly efficient in accessing synthetically valuable 2-oxazolidinones and γ-lactams by visible light. Mechanism studies supported our working hypothesis that the energy transfer path is mainly operative.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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: Copper(I) tetra(acetonitrile) tetrafluoroborate, is researched, Molecular C8H12BCuF4N4, CAS is 15418-29-8, about The [Ag25Cu4H8Br6(CCPh)12(PPh3)12]3+ : Ag13H8 silver hydride core protected by [CuAg3(CCPh)3(PPh3)3]+ motifs.Application In Synthesis of Copper(I) tetra(acetonitrile) tetrafluoroborate.

Copper alkynyl complexes [CuAg3(CCAr)3(PPh3)3]+ (Ar = Ph, p-C6H4Me), in which three Ag(PPh3) units are bound among three CCAr arms of trigonal-planar [Cu(CCAr)3]2-, were selected as a protecting unit to cover the metal core of an atomically precise core-shell-type cluster. First, the formation of the protecting unit through the reaction of Cu(NCMe)4(PF6) with Ag(CCAr) and PPh3 in a 1 : 3 : 3 ratio was confirmed. The reaction gave dimeric [CuAg3(CCAr)3(PPh3)3]22+, in which the two planar [CuAg3(CCAr)3(PPh3)3]+ units were stacked. Next, core-shell-type clusters were synthesized by adding NaBH4 and Et4NX (X = Cl, Br) to a solution similar to that used to prepare the protecting unit. The trigonal-planar protecting units nicely formed core-shell-type Ag nanoclusters formulated as [Ag13H8X6{CuAg3(CCAr)3(PPh3)3}4]3+ (X = Cl, Ar = p-C6H4Me; X = Br, Ar = p-C6H4Me; X = Br, Ar = Ph). Their crystal structures revealed that the four [CuAg3(CCAr)3(PPh3)3]+ units are linked by six halogen ions to form a tetrahedral cage that accommodates a polyhydride-Ag cluster formulated as Ag13H85+. As a concrete proof of the existence of the polyhydride, deuterated analogs Ag13D85+ were synthesized and subsequently characterized by high-resolution electrospray-ionization mass spectrometry measurements.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Reference of 1-Benzyl-5-nitro-1H-indazole. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-Benzyl-5-nitro-1H-indazole, is researched, Molecular C14H11N3O2, CAS is 23856-20-4, about A method for the regioselective synthesis of 1-alkyl-1H-indazoles. Author is Liu, Han-Jun; Hung, Shiang-Fu; Chen, Chuan-Lin; Lin, Mei-Huey.

A method for the regioselective synthesis of 3-unsubstituted 1-alkyl-1H-indazoles, starting with 2-halobenzonitriles and N-alkylhydrazines, is described. The two-step reaction pathway proceeds through the intermediacy of 1-alkyl-3-amino-1H-indazoles followed by reductive deamination.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Li, Shigang; Wu, Yanning; Zhao, Xiaoyun; Liu, Liang published the article 《Restricting structural relaxation of a phosphorescent copper emitter via polymer framework: Characterization and performance》. Keywords: crystal structure copper iodophenylpyridinyloxadiazole phosphine; copper pyridyloxadiazole preparation.They researched the compound: Copper(I) tetra(acetonitrile) tetrafluoroborate( cas:15418-29-8 ).Related Products of 15418-29-8. 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:15418-29-8) here.

A diamine ligand having an electron-withdrawing oxadiazole in its mol. structure was designed. With the help from an auxiliary ligand, PPh3, its Cu(I) complex was synthesized and analyzed, including single crystal structure, electronic transitions and photophys. features. A distorted tetrahedral coordination field was adopted by this Cu(I) complex which experienced intense geometric distortion. To limit this excited state geometric distortion and consequently improve its emissive performance, this Cu(I) complex was dispersed and immobilized into a polymer rigid framework through electrospinning method. A detailed anal. on the photophys. parameters of solid sample, solution sample and electrospinning fibrous samples suggested that polymer immobilization was highly effective in limiting excited state geometric distortion. Dopant mols. were dispersed and immobilized in polymer’s rigid and protective microenvironment. In this case, their geometric distortion was effectively limited, showing improved photophys. performance, such as emission blue shift, long-lived emissive center and better photostability.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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.de Aguirre, Adiran; Funes-Ardoiz, Ignacio; Maseras, Feliu researched the compound: Tris(2,2′-bipyridine)ruthenium bis(hexafluorophosphate)( cas:60804-74-2 ).Formula: C30H24F12N6P2Ru.They published the article 《Four Oxidation States in a Single Photoredox Nickel-Based Catalytic Cycle: A Computational Study》 about this compound( cas:60804-74-2 ) in Angewandte Chemie, International Edition. Keywords: iodoacetanilide alkene oxidative addition reaction nickel catalyst potential barrier; cyclizations; density-functional calculations; nickel; photochemistry; reaction mechanisms. We’ll tell you more about this compound (cas:60804-74-2).

The computational characterization of the full catalytic cycle for the synthesis of indoline from the reaction between iodoacetanilide and a terminal alkene catalyzed by a nickel complex and a photoactive ruthenium species is presented. A variety of oxidation states of nickel, Ni0, NiI, NiII, and NiIII, is shown to participate in the mechanism. Ni0 is necessary for the oxidative addition of the C-I bond, which goes through a NiI intermediate and results in a NiII species. The NiII species inserts into the alkene, but does not undergo the reductive elimination necessary for C-N bond formation. This oxidatively induced reductive elimination can be accomplished only after oxidation to NiIII by the photoactive ruthenium species. All the reaction steps are computationally characterized, and the barriers for the single-electron transfer steps calculated using a modified version of the Marcus Theory.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of C9H8BNO2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Quinolin-6-ylboronic acid, is researched, Molecular C9H8BNO2, CAS is 376581-24-7, about Copper-Mediated DNA-Compatible One-Pot Click Reactions of Alkynes with Aryl Borates and TMS-N3. Author is Qu, Yi; Wen, Huanan; Ge, Rui; Xu, Yanfen; Gao, Hong; Shi, Xiaodong; Wang, Jiangong; Cui, Weiren; Su, Wenji; Yang, Hongfang; Kuai, Letian; Satz, Alexander L.; Peng, Xuanjia.

We report a DNA-compatible copper-mediated efficient synthesis of 1,2,3-triazoles via a one-pot reaction of aryl borates with TMS-N3 followed by a click cycloaddition reaction. Employing the binuclear macrocyclic nanocatalyst Cu(II)-β-cyclodextrin, the reactions were performed under mild conditions with high conversions and wide functional group tolerance. We also demonstrate the reaction application toward a one-pot DNA-compatible intramol. macrocyclization. Our optimized reaction protocol results in no significant DNA damage as judged by qPCR anal. and Sanger sequencing data.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Daumar, Pierre; Zeglis, Brian M.; Ramos, Nicholas; Divilov, Vadim; Sevak, Kuntal Kumar; Pillarsetty, NagaVaraKishore; Lewis, Jason S. published an article about the compound: 2-Chloro-6-nitrobenzo[d]thiazole( cas:2407-11-6,SMILESS:O=[N+](C1=CC=C2N=C(Cl)SC2=C1)[O-] ).Electric Literature of C7H3ClN2O2S. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:2407-11-6) through the article.

Type II topoisomerase (Topo-II) is an ATP-dependent enzyme that is essential in the transcription, replication, and chromosome segregation processes and, as such, represents an attractive target for cancer therapy. Numerous studies indicate that the response to treatment with Topo-II inhibitors is highly dependent on both the levels and the activity of the enzyme. Consequently, a non-invasive assay to measure tumoral Topo-II levels has the potential to differentiate responders from non-responders. With the ultimate goal of developing a radiofluorinated tracer for positron emission tomog. (PET) imaging, we have designed, synthesized, and evaluated a set of fluorinated compounds based on the structure of the ATP-competitive Topo-II inhibitor QAP1. Compounds I and II showed inhibition of Topo-II in in vitro assays and exhibited moderate, Topo-II level dependent cytotoxicity in SK-BR-3 and MCF-7 cell lines. Based on these results, 18F-labeled analogs of these two compounds were synthesized and evaluated as PET probes for imaging Topo-II overexpression in mice bearing SK-BR-3 xenografts. [18F]-I and [18F]-II were synthesized from their corresponding protected tosylated derivatives by fluorination and subsequent deprotection. Small animal PET imaging studies indicated that both compounds do not accumulate in tumors and exhibit poor pharmacokinetics, clearing from the blood pool very rapidly and getting metabolized over. The insights gained from the current study will surely aid in the design and construction of future generations of PET agents for the non-invasive delineation of Topo-II expression.

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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 376581-24-7, is researched, Molecular C9H8BNO2, about Microwave promoted Synthesis of Ssubstituted Quinazoline Derivatives using 1,4dihydroquinazoline2thiol, the main research direction is quinazoline microwave.Electric Literature of C9H8BNO2.

A novel, rapid and efficient microwave-assisted synthesis of Ssubstituted quinazoline derivatives was obtained using 1,4dihydroquinazoline2thiol and various boronic acids with copper catalyst in onepot reactions. The versatility of the synthetic protocol with various boronic acids and the optimization processes of the microwave irradiation conditions including temperature, solvent, and reaction time were demonstrated.

If you want to learn more about this compound(Quinolin-6-ylboronic acid)Electric Literature of C9H8BNO2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(376581-24-7).

Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI