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”

De Novo Synthesis of Bacteriochlorins Bearing Four Trideuteriomethyl Groups was written by Jing, Haoyu;Tang, Qun;Bocian, David F.;Lindsey, Jonathan S.. And the article was included in Organics in 2022.HPLC of Formula: 34946-82-2 This article mentions the following:

Site-specific introduction of isotopes in tetrapyrrole macrocycles provides the foundation for probing physicochem. features germane to photosynthetic energy-transduction processes, but has chiefly been done with porphyrins rather than the more biol. relevant hydroporphyrin analogs of native photosynthetic pigments. A prior study incorporated pairwise 13C or 15N atoms in the skeleton of a bacteriochlorin containing a gem-di-Me group in each pyrroline ring. Here, a complementary effort is reported that installs deuterium atoms in substituents at the perimeter of a bacteriochlorin. Thus, perdeuteriated 3-methyl-2,4-pentanedione was converted in an 8-step synthesis via the intermediacy of tert-Bu 5-formyl-3,4-bis(trideuteriomethyl)pyrrole-2-carboxylate to the 2,3,12,13-tetrakis(trideuteriomethyl)-8,8,18,18-tetramethylbacteriochlorin (BC-2). The fidelity of isotope substitution was maintained throughout the synthesis. Resonance Raman spectroscopy of the copper chelate (CuBC-2) revealed that addition of the four β-pyrrolic substituents alone is not sufficient to account for the vibronic complexity observed for the copper chelate of bacteriochlorophyll a (CuBChl a). The increased vibronic activity exhibited by the natural pigments and CuBChl a must arise from the increased structural complexity of the macrocycle. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2HPLC of Formula: 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. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. HPLC of Formula: 34946-82-2

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

Two copper complexes based on nitronyl nitroxide with different halides: structures and magnetic properties was written by Wang, Xiang-Lan;Li, Yuan-Xia;Yang, Shuai-Liang;Zhang, Chen-Xi;Wang, Qing-Lun. And the article was included in Journal of Coordination Chemistry in 2017.Safety of copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

Complexes based on different halogen-substituted nitronyl nitroxide radicals and Cu(II), Cu₃(hfac)₆(NIT-Ph-F)₂ (1) and Cu₃(hfac)₆(NIT-Ph-Cl)₂ (2) (hfac = hexafluoroacetylacetonate; NIT-Ph-F = 2-(4′-fluorophenyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide; NIT-Ph-Cl = 2-(4′-chlorphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), were synthesized and characterized structurally and magnetically. X-ray crystal structure analyses show that 1 and 2 have similar centrosym. five-spin structures consisting of three Cu(II) ions bridged by two nitroxide ligands. The Cu(II) is coordinated by six oxygens to form an octahedron, while the five coordination of the terminal Cu(II) ion is square pyramidal. Magnetic measurements reveal strong antiferromagnetic interactions between Cu(II) ions and radicals in 1 (J = -38.9 cm^-1) and weak antiferromagnetic interactions between Cu(II) ions and radicals in 2 (J = -1.23 cm^-1), which may be explained by the bond length of the Cu-O_rad (2.468(2) Å) in , which is shorter than that (2.514(2) Å) in , and the dihedral angle (73.17(1)°) of the plane O7-O8-Cu(2)-O7A-O8A with the moiety O5-N1-C11-N2-O6 in 1 is smaller than (77.82(1)°) in 2. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Safety 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.Safety of copper(ii)hexafluor-2,4-pentanedionate

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”

Comparative study on structural, magnetic and spectroscopic properties of four new copper(II) coordination polymers with 4′-substituted terpyridine ligands was written by Toledo, Dominique;Vega, Andres;Pizarro, Nancy;Baggio, Ricardo;Pena, Octavio;Roisnel, Thierry;Pivan, Jean-Yves;Moreno, Yanko. And the article was included in Journal of Solid State Chemistry in 2017.Electric Literature of C10H2CuF12O4 This article mentions the following:

The synthesis and characterization of four Cu(II) complexes with different terpyridyl ligands were carried out, their crystal and mol. structures determined and their magnetic and luminescent properties analyzed. The ligands used in the coordination reactions were 4′-(3-methyl-2-thienyl)-4,2′:6′,4”-terpyridine (4-stpy), -4′-(4-quinolinyl)-4,2′:6′,4”-terpyridine (4-qtpy), 4′-(4-quinolinyl)-3,2′:6′,3”-terpyridine (3-qtpy, unreported so far) and 4′-(4-cyanophenyl)-4,2′:6′,4”-terpyridine (4-cntpy); the reaction of these ligands with Cu(II)-hexafluoroacetylacetone (Cu(hfacac)₂) gives rise to coordination polymers Cu(4-stpy)(hfacac)₂ (1), Cu(4-qtpy)(hfacac)₂ (2), Cu(3-qtpy)(hfacac)₂ (3) and Cu(4-cntpy)(hfacac)₂ (4). The different location of the N atom of the outer ring is responsible for the different coordination modes. The emission spectra of CH₂Cl₂ solutions are consistent with dissociation of the complexes; the emission maxima simulate those of the free ligands. The emission of 1, 3 and 4 in the solid state is essentially quenched upon complexation with Cu(II), whereas for compound 2 an emission at 420 nm is observed The interaction between Cu centers was related with the coplanarity of terpyridine rings. Complexes 1–3 exhibit a paramagnetic behavior, while compound 4, with the smallest torsion angle between pyridine moieties, shows an antiferromagnetic behavior described by a dimeric model, with J = -4.38 cm^-1, g = 2.06 and ρ=0.07. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Electric Literature 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 low toxicity and inexpensive, earth-abundant. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Electric Literature of C10H2CuF12O4

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

Phosphonites Based on the Paracyclophane Backbone: New Ligands for Highly Selective Rhodium-Catalyzed Asymmetric Hydrogenation was written by Zanotti-Gerosa, Antonio;Malan, Christophe;Herzberg, Daniela. And the article was included in Organic Letters in 2001.Safety of (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol This article mentions the following:

The synthesis of new phosphonites with a chiral paracyclophane backbone is described. The Rh complexes derived from the phosphonites (e.g. I) bearing biphenoxy and binaphthoxy substituents are highly active and highly selective catalysts for the asym. hydrogenation of dehydroamino acids and esters. For example, >99% N-acetylalanine Me ester with 99 %ee was obtained in 1/2 h using the Rh complex of I. 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 nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, 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”

Heterospin complex showing spin transition at room temperature was written by Tolstikov, S. E.;Artiukhova, N. A.;Romanenko, G. V.;Bogomyakov, A. S.;Zueva, E. M.;Barskaya, I. Yu.;Fedin, M. V.;Maryunina, K. Yu.;Tretyakov, E. V.;Sagdeev, R. Z.;Ovcharenko, V. I.. And the article was included in Polyhedron in 2015.Recommanded Product: copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

New nitronyl nitroxides L^Me and L^Me-CP containing a 4-methylpyridin-3-yl substituent were synthesized. The interaction of Cu(hfac)₂ with L^Me and L^Me-CP gave binuclear [Cu(hfac)₂L^Me]₂ and [Cu(hfac)₂L^Me-CP]₂·Solv (Solv = n-C₆H₁₄, n-C₁₀H₂₂, n-C₁₆H₃₄) and chain polymer {[[Cu(hfac)₂]₂L^Me₂][Cu(hfac)₂]}_∞ heterospin complexes. An important structural peculiarity of L^Me and L^Me-CP is a large dihedral angle between the planes of the O^·-N-C:N → O paramagnetic fragment and the pyridine ring: 55.2 and 56.1°, resp. The presence of a Me group in the pyridine ring of the nitroxide mol. in {[[Cu(hfac)₂]₂L^Me₂][Cu(hfac)₂]}_∞ proved favorable for spin transition at nearly room temperature In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Recommanded Product: copper(ii)hexafluor-2,4-pentanedionate).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) 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. 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: copper(ii)hexafluor-2,4-pentanedionate

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

Tuning Magnetic Relaxation in a Tb-Nitronyl Nitroxide Complex by Using Cocrystalline Paramagnetic Complex was written by Wang, Juan-Juan;Sun, Juan;Yang, Meng;Li, Li-Cun. And the article was included in Inorganic Chemistry in 2015.Name: copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

New 2p-4f and 2p-3d-4f compounds [Tb(hfac)₃(NIT-PhNO₂)₂]·0.5C₇H₁₆ (1) and [Ln(hfac)₃(NIT-PhNO₂)₂]₂[Cu(hfac)₂(NIT-PhNO₂)₂] (Ln^III = Gd 2, Tb 3; hfac = hexafluoroacetylacetonate; NIT-PhNO₂ = 2-(p-nitrophenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been obtained. Complex 1 consists of mononuclear trispin [Tb(hfac)₃(NIT-PhNO₂)₂] units in which two radical ligands are ligated to the Tb(III) ion as monodentate ligands through the NO groups, while complexes 2 and 3 contain two kinds of trispin moieties, namely, [Ln(hfac)₃(NIT-PhNO₂)₂] and [Cu(hfac)₂(NIT-PhNO₂)₂]. In the [Cu(hfac)₂(NIT-PhNO₂)₂] moiety, the radicals are bonded to the copper(II) ion in the axial positions via the nitroxides. For three compounds, 1D supramol. chains are formed via the π-π stacking interactions involving the radical ligands. Magnetic investigations show that both Tb complexes exhibit slow relaxation of magnetization at low temperature; strikingly, complex 3 displays a higher energy barrier than that of 1. It represents the first example to use the paramagnetic complex to tune magnetic relaxation of 4f-based compounds In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Name: copper(ii)hexafluor-2,4-pentanedionate).

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 phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Name: copper(ii)hexafluor-2,4-pentanedionate

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