Month: February 2023

Stable and reactive diacetyliminoxyl radical in oxidative C-O coupling with β-dicarbonyl compounds and their complexes was written by Budnikov, Alexander S.;Krylov, Igor B.;Lastovko, Andrey V.;Paveliev, Stanislav A.;Romanenko, Alexander R.;Nikishin, Gennady I.;Terent’ev, Alexander O.. And the article was included in Organic & Biomolecular Chemistry in 2021.Computed Properties of C10H2CuF12O4 This article mentions the following:

In the present study, the unusually stable diacetyliminoxyl radical I was presented as a ”golden mean” between transient and stable unreactive radicals. It was successfully employed as a reagent for oxidative C-O coupling with β-dicarbonyl compounds II (R = Me, Bu, chloro, benzyl) and R¹C(O)CH(R²)C(O)R³ (R¹ = Me, phenyl; R² = Me, allyl, Ph, benzyl, chloro; R³ = Me, Ph, ethoxy). Using this model radical the catalytic activity of acids, bases and transition metal ions in free-radical coupling was revealed. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Computed Properties of C10H2CuF12O4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Computed Properties of C10H2CuF12O4

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

Synthesis of Tungsten Oxo Alkylidene Biphenolate Complexes and Ring-Opening Metathesis Polymerization of Norbornenes and Norbornadienes was written by Yan, Tao;VenkatRamani, Sudarsan;Schrock, Richard R.;Muller, Peter. And the article was included in Organometallics in 2019.Safety of (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol This article mentions the following:

We have synthesized and characterized tungsten oxo alkylidene biphenolate complexes with the formulas W(O)(CHR)(rac-biphenolate)(PPhMe₂) and (R,S)-[W(μ-O)(CHR)(biphenolate)]₂ (R = CMe₂Ph; biphenolate = L1 or L2 in the text). They behave as initiators for the stereoselective (cis,isotactic) polymerization of 2,3-dicarbomethoxy-5-norbornadiene and eight enantiomerically pure 5-substituted norbornenes with a cis,isotactic precision of 95-98% in most cases. The active initiators are 14e W(O)(CHR)(biphenolate) complexes, which are formed through either dissociation of PPhMe₂ from the phosphine adducts or scission of the heterochiral dimer. Addition of B(C₆F₅)₃ (one per W) to (R,S)-[W(μ-O)(CHR)(L1)]₂ led to formation of what we propose to be monomeric W[OB(C₆F₅)₃](CHR)(L1) in equilibrium with B(C₆F₅)₃ and (R,S)-[W(μ-O)(CHR)(L1)]₂. This mixture decomposed over a period of 1-2 h, was much slower to initiate polymerization than (R,S)-[W(μ-O)(CHR)(L1)]₂, and was much less stereoselective. Polymerization of five of the monomers with the imido alkyidene initiator, W(N-2,6-Me₂C₆H₃)(CHCMe₂Ph)(rac-L1), gave virtually identical results compared to the results obtained with oxo complexes. In the experiment, the researchers used many compounds, for example, (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3Safety of (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol).

(S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Safety of (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol

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

Slow Magnetic Relaxation in Ladder-Type and Single-Strand 2p-3d-4f Heterotrispin Chains was written by Yang, Meng;Xie, Jing;Sun, Zan;Li, Licun;Sutter, Jean-Pascal. And the article was included in Inorganic Chemistry in 2017.Application of 14781-45-4 This article mentions the following:

Ladder-type and chain 2p-3d-4f complexes based on a bridging nitronyl nitroxide radical, namely, [LnCu(hfac)₅(NIT-Ph-p-OCH₂trz)]·0.5C₆H₁₄ [Ln = Y (1a), Dy (1b)] and [LnCu(hfac)₅(NIT-Ph-p-OCH₂trz)] [Ln = Y (2a), Dy (2b); NIT-Ph-p-OCH₂trz = 2-[4-[(1H-1,2,4-triazol-1-yl)methoxy]phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate] were successfully achieved through a 1-pot reaction of the NIT-Ph-p-OCH₂trz radical with Cu(hfac)₂ and Ln(hfac)₃·2H₂O. Complexes 1a and 1b feature a ladder-like structure, where the rails are made of Ln(III) and Cu(II) ions alternatively bridged by nitronyl nitroxide and the triazole units while the NIT-Ph-p-OCH₂trz moieties act as the rungs of the ladder. Complexes 2a and 2b consist of 1D nitronyl nitroxide bridged Ln coordination polymers with dangly Cu(II) units connected to the triazole moieties. All of compounds exhibit ferromagnetic NIT-Dy and/or NIT-Cu interactions. Both Dy derivatives (1b and 2b) show frequency-dependent out-of-phase magnetic susceptibility signals in a zero field indicating slow magnetic relaxation behavior. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Application of 14781-45-4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Application of 14781-45-4

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

Regioselective Alkylpolyfluoroarylation of Styrenes by Copper-Catalyzed C(sp³)-H and C(sp²)-H Double Activation was written by Zheng, Chenggong;Yan, Fangpei;Liu, Yaomei;Chen, Rui;Zheng, Kaiting;Xiao, Hua;Li, Xiao-Xuan;Feng, Yi-Si;Fan, Shilu. And the article was included in Organic Letters in 2022.Application of 34946-82-2 This article mentions the following:

A novel dehydrogenative dicarbofunctionalization of vinyl arenes ArCH=CHR (Ar = Ph, thiophen-2-yl, 2H-1,3-benzodioxol-5-yl, etc.; R = H, Me) with polyfluoroarenes I (R¹ = F, OMe, Ph, etc.) and inactivated alkanes such as cyclohexane, cyclopentane, cycloheptane, etc. enabled by copper catalysis has been accomplished under mild conditions. This transformation provides a regioselective route to highly functionalized polyfluoroaryl compds II (R² = cyclopentyl, cyclohexyl, cycloheptyl, etc.) that occur as structural scaffolds in a variety of pharmaceuticals and materials. Preliminary mechanistic studies indicate that the carbon-based radical and copper intermediate are involved in the reaction, and the reaction pathway is dominated by the bond dissociation energy (BDE) of C(sp³)-H bonds. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Application of 34946-82-2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Application of 34946-82-2

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

Construction of Nitronyl Nitroxide-Based 3d-4f Clusters: Structure and Magnetism was written by Wang, Xiu-Feng;Hu, Peng;Li, Yun-Gai;Li, Li-Cun. And the article was included in Chemistry – An Asian Journal in 2015.Quality Control of copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

Three unprecedented nitronyl nitroxide radical-bridged 3d-4f clusters, [Ln₂Cu₂(hfac)₁₀(NIT-3py)₂(H₂O)₂] (Ln^III = Y, Gd, Dy), were obtained from the self-assembly of Ln(hfac)₃, Cu(hfac)₂, and the radical ligand. The Dy complex shows a slow relaxation of magnetization, representing the first nitronyl nitroxide radical-based 3d-4f cluster with single-mol. magnet behavior. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Quality Control of copper(ii)hexafluor-2,4-pentanedionate).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Quality Control of copper(ii)hexafluor-2,4-pentanedionate

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

Rhodium(III)-Catalyzed Synthesis of Diverse Fluorescent Polycyclic Purinium Salts from 6-Arylpurine Nucleosides and Alkynes was written by Yang, Qi-Liang;Liu, Ying;Luo, Yi-Rui;Li, Zhi-Hao;Jia, Hong-Wei;Fu, Ya-Bo;Qu, Gui-Rong;Guo, Hai-Ming. And the article was included in Organic Letters in 2022.Recommanded Product: Copper(II) trifluoromethanesulfonate This article mentions the following:

Described herein is an efficient strategy for assembling a new library of functionalized polycyclic purinium salts with a wide range of anions through Rh^III-catalyzed C-H activation/annulation of 6-arylpurine nucleosides with alkynes under mild reaction conditions. The resulting products displayed tunable photo-luminescence covering most of the visible spectrum.nod cl. Mechanistic insights delineated the rhodium catalyst’s mode of action. A purino-isoquinolinium-coordinated rhodium(I) sandwich complex was well characterized and identified as the key intermediate. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Recommanded Product: Copper(II) trifluoromethanesulfonate).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Recommanded Product: Copper(II) trifluoromethanesulfonate

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

Cu(hfac)₂ Complexes with Acyclic Nitroxide Prone to Single-Crystal to Single-Crystal Transformation and Showing Mechanical Activity was written by Golomolzina, Irina;Tolstikov, Svyatoslav;Letyagin, Gleb;Romanenko, Galina;Bogomyakov, Artem S.;Ya. Akyeva, Anna;Syroeshkin, Mikhail A.;Egorov, Mikhail P.;Morozov, Vitaly;Ovcharenko, Victor. And the article was included in Crystal Growth & Design in 2022.Reference of 14781-45-4 This article mentions the following:

The heterospin solid phases of the chain polymer [Cu(hfac)₂L^Et]_∞ and bicyclic mol. [Cu(hfac)₂L^Et]₂-I (L^R = pyrazolyl-substituted tert-butylnitroxide; 1-R-5-(tert-butyl-oxylamino)pyrazole, R = Et, Pr) were found to undergo spontaneous transformation into the bicyclic mol. [Cu(hfac)₂L^Et]₂-II. The single-crystal to single-crystal (SC-SC) transformation of [Cu(hfac)₂L^Et]₂-I into [Cu(hfac)₂L^Et]₂-II was recorded by X-ray diffraction anal. of the crystal as a function of time. At 255-277 K, the [Cu(hfac)₂L^Et]₂-I → [Cu(hfac)₂L^Et]₂-II SC-SC transformation proceeded for 12-18 h. The [Cu(hfac)₂L^Et]_∞ → [Cu(hfac)₂L^Et]₂-II SC-SC phase transformation was accompanied by a change in the crystal shape, spontaneous mech. displacements of crystals, and a change in color from orange to dark green. This process started, to a certain extent, already in the crystals lying under the layer of the mother solution After the crystals were separated from the solution, the SC-SC transformation [Cu(hfac)₂L^Et]_∞ → [Cu(hfac)₂L^Et]₂-II occurred completely within 4 h at room temperature Under normal conditions, [Cu(hfac)₂L^Pr]₂-I also undergoes transformation into [Cu(hfac)₂L^Pr]₂-II. At the macro level, the transformation [Cu(hfac)₂L^Pr]₂-I → [Cu(hfac)₂L^Pr]₂-II is accompanied by spontaneous fragmentation of crystals, visualized as a scatter of small particles of the formed phase in different directions. The reverse transformation [Cu(hfac)₂L^Pr]₂-II → [Cu(hfac)₂L^Pr]₂-I occurs when [Cu(hfac)₂L^Pr]₂-II is cooled below 225 K. When [Cu(hfac)₂L^Pr]₂-II was heated above 300 K, the irreversible SC-SC phase transformation [Cu(hfac)₂L^Pr]₂-II → [Cu(hfac)₂L^Pr]_∞ was observed, which caused a pronounced change in the color of the crystals from dark green to orange. Heat treatment of the [Cu(hfac)₂L^Pr]_∞ single crystal at 303 K on a diffractometer for 1 day or more caused partial melting of the starting crystal, disappearance of X-ray diffraction reflections from the sample under study, and appearance of reflections corresponding to the formation of the new polymer complex [Cu(hfac)₂L^*Pr]_∞, where L^*Pr is the product of transformation of the radical including the oxidation of L^Pr and migration of the nitroxide O atom to the heterocycle, leading to the formation of 5-(tert-butylimino)-1-propyl-1,5-dihydro-4H-pyrazol-4-one (L^*Pr). The results of the X-ray diffraction study of the phase transformations completely agreed with the data of magnetochem. measurements for the complexes. Having replaced the acyclic nitroxides L^Et and L^Pr by their diamagnetic structural analogs L^PEt (2,2-dimethyl-1-(1-ethyl-1H-pyrazol-5-yl)propan-1-one) and L^PPr (2,2-dimethyl-1-(1-propyl-1H-pyrazol-5-yl)propan-1-one), we obtained the complexes [Cu(hfac)₂L^PEt]_∞, [Cu(hfac)₂(L^PPr)₂], and [(Cu(hfac)₂)₃(L^PPr)₂], for which the transformations are absolutely not characteristic. It was also found that polymorphic transformations are also uncharacteristic of complexes of other metals with the acyclic nitroxides under study ([Zn(hfac)₂L^Et]₂, [Zn(hfac)₂L^Pr]₂, [Mn(hfac)₂L^Et]₂). Thus, it was shown that the presence of both the Cu(II) ion and coordinated O-N group of acyclic nitroxide in the solid phase are favorable conditions for the emergence of stereochem. nonrigidity and multiple phase transformations in the compounds of Cu(hfac)₂ with acyclic nitroxides. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Reference of 14781-45-4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Reference of 14781-45-4

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

A reaction-dissolution strategy for designing solid electrolyte interphases with stable energetics for lithium metal anodes was written by Biswal, Prayag;Rodrigues, Joshua;Kludze, Atsu;Deng, Yue;Zhao, Qing;Yin, Jiefu;Archer, Lynden A.. And the article was included in Cell Reports Physical Science in 2022.Recommanded Product: 34946-82-2 This article mentions the following:

The spatial variations in chem. composition and transport properties of the interphase formed on reactive metal electrodeposits dictate the stability and reversibility of electrochem. cells that use reactive metals as anodes. Here we report on the influence of carbonate and fluorinated electrolytes infused with ethers as additives on the phys.-chem. characteristics and reversibility of metallic lithium (Li) during early stages of electrodeposition and later stages of deep cycling of Li metal anodes. We show that a feasible strategy for achieving and sustaining kinetically enhanced interphases through the cycle life of Li electrodeposits is by simultaneous use of sacrificial electrolyte components that undergo electroreduction to enrich the interphase with fluorinated species in tandem with cleaning electrolyte components that promote dissolution and removal of less desirable carbonaceous compounds We demonstrate that this approach translates to high electrochem. reversibility during deep cycling of the Li metal anode and improved performance of Li metal batteries. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Recommanded Product: 34946-82-2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, low toxicity and inexpensive. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. Recommanded Product: 34946-82-2

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

Diastereo- and Enantioselective Inverse-Electron-Demand Diels-Alder Cycloaddition between 2-Pyrones and Acyclic Enol Ethers was written by Huang, Guanghao;Guillot, Regis;Kouklovsky, Cyrille;Maryasin, Boris;de la Torre, Aurelien. And the article was included in Angewandte Chemie, International Edition in 2022.Related Products of 34946-82-2 This article mentions the following:

A broadly applicable diastereo- and enantioselective inverse-electron-demand Diels-Alder reaction of 2-pyrones and acyclic enol ethers was reported herein. Using a copper(II)-BOX catalytic system, bridged bicyclic lactones were obtained in very high yields (up to 99% yield) and enantioselectivities (up to 99% ee) from diversely substituted 2-pyrones and acyclic enol ethers. Mechanistic experiments as well as DFT calculations indicated the occurrence of a stepwise mechanism. The synthetic potential of the bridged bicyclic lactones was showcased by the enantioselective synthesis of polyfunctional cyclohexenes and cyclohexadienes, as well as a carbasugar unit. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Related Products of 34946-82-2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. The copper-mediated C-C, C-O, C-N, and C-S bond formation is a part of one oldest reaction, emphasizing the Ullmann cross-coupling reaction.Related Products of 34946-82-2

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

Remote Functionalization of 8-Substituted Quinolines with para-Quinone Methides: Access to Unsymmetrical Tri(hetero)arylmethanes was written by Burra, Amarender G.;Uredi, Dilipkumar;Motati, Damoder R.;Fronczek, Frank R.;Watkins, E. Blake. And the article was included in European Journal of Organic Chemistry in 2022.Electric Literature of C2CuF6O6S2 This article mentions the following:

A C(5)-H remote functionalization of para-quinone methides I (R = Me, tert-Bu, phenyl; Ar = C(O)₂Et, Ph, 2-pyrenyl, etc.) with 8-aminoquinoline derivatives, II (R¹ = acetyl, benzyl, (4-methylbenzene)sulfonyl, etc.; R² = H, benzyl; R³ = H, Br; R⁴ = H, OMe) affording direct access to unsym. tri(hetero)arylmethanes III in 69-96% yield is described. This method provides diverse tri(hetero)arylmethanes III with a broad scope and in a regioselective manner. The transformation works well with electron-rich and electron-deficient substrates. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Electric Literature of C2CuF6O6S2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Electric Literature of C2CuF6O6S2

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