Day: February 22, 2023

Silylium-Ion-Promoted Skeletal Reorganization of β-Silylated Cyclopropanes Bearing an Allyl Group at the Silicon Atom Coupled with Intermolecular Formation of a Quaternary Carbon Atom was written by Long, Peng-Wei;Wang, Guoqiang;Klare, Hendrik F. T.;Oestreich, Martin. And the article was included in ACS Catalysis in 2022.Application In Synthesis of Copper(II) trifluoromethanesulfonate This article mentions the following:

A highly selective cationic rearrangement of β-silylated cyclopropanes bearing an allyl group at the Si atom is reported. The reaction cascade is initiated by trityl-cation-mediated deallylation to preferentially yield one of two diastereomeric cyclopropane-stabilized silylium ions. This is the starting point for a concerted [1,2]-hydride shift/ring expansion driven by the release of ring strain of the cyclopropane ring. The resulting tertiary carbenium ion is then captured by an intermol. Si-to-C allyl transfer from another precursor mol. By this, a quaternary C atom is formed. The computed reaction mechanism is fully consistent with the exptl. findings. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Application In Synthesis of Copper(II) trifluoromethanesulfonate).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Copper nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Application In Synthesis of Copper(II) trifluoromethanesulfonate

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

Magnetic relaxation in [Ln(hfac)₄]^– anions with [Cu(hfac)-radical]_nⁿ⁺ cation chains as counterions was written by Sun, Juan;Yang, Meng;Xi, Lu;Ma, Yue;Li, Licun. And the article was included in Dalton Transactions in 2018.Product Details of 14781-45-4 This article mentions the following:

Using a new nitronyl nitroxide radical Nit-Ph-PyIm, two novel 3d-4f complexes with the formula {[Ln(hfac)₄]^–[Cu(hfac)(Nit-Ph-PyIm)]⁺}_n (Ln^III = Gd 1, Dy 2) have been isolated (Nit-Ph-PyIm = 2-[4-[2-(2-pyridinyl)-1H-imidazol-1-yl]-phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate). Interestingly, for both compounds, there are discrete [Ln(hfac)₄]^– anions while [Cu(hfac)-radical]_nⁿ⁺ chains serve as counter-ions in which the Nit-Ph-PyIm radicals link [Cu(hfac)]⁺ units through their NO groups and imidazolyl pyridine moieties. The [Cu(hfac)(Nit-Ph-PyIm)]⁺ unit is diamagnetic owing to the strong antiferromagnetic coupling between the Cu(II) ion and the equatorially coordinated NO group. Complex 2 shows field-induced slow magnetization relaxation, arising from [Dy(hfac)₄]^– anions that exhibit distorted square-antiprism (D_4d) geometries. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Product Details 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, low toxicity and inexpensive. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Product Details of 14781-45-4

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

A metal-radical hetero-tri-spin SCM with methyl-pyrazole-nitronyl nitroxide bridges was written by Huang, Xiaohui;Wang, Kang;Han, Jing;Xie, Junfang;Li, Licun;Sutter, Jean-Pascal. And the article was included in Dalton Transactions in 2021.Electric Literature of C10H2CuF12O4 This article mentions the following:

The preparation, crystal structures, and magnetic properties of a family of hetero-tri-spin 1-D coordination polymers with the formula [Ln(hfac)₃Cu(hfac)₂(4-NIT-MePyz)₂] (Ln = Gd, 1, Tb, 2, Dy, 3; hfac = hexafluoroacetylacetonate; 4-NIT-MePyz = 2-{4-(1-methyl)-pyrazolyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) are reported. In these complexes, the 4-NIT-MePyz radical acts as a linker to bridge the CuII and LnIII ions through its pyrazole and aminoxyl groups to form a chain structure. Magnetic properties typical of spin-chains are observed for Dy and Tb derivatives but single-chain magnet (SCM) behavior was evidenced only for the Tb compound which is characterized by an energy gap for demagnetization Δτ/kB of 31 K. 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. Copper catalyst has received great attention owing to the low toxicity and low cost. Copper of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Electric Literature of C10H2CuF12O4

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

Catalytic Enantioselective Ring-Closing Metathesis by a Chiral Biphen-Mo Complex was written by Alexander, John B.;La, Daniel S.;Cefalo, Dustin R.;Hoveyda, Amir H.;Schrock, Richard R.. And the article was included in Journal of the American Chemical Society in 1998.SDS of cas: 205927-03-3 This article mentions the following:

The enantioselective synthesis of chiral Mo-alkylidene I is reported. This nonracemic transition metal complex bears 5,5′,6,6′-tetramethyl-3,3′-di-tert-butyl-1,1′-biphenyl-2,2′-diol as the chiral ligand, which is resolved by recrystallization of the derived phosphoric acid with optically pure cinchonidine. The catalyst structure is characterized by x-ray crystallog., as well as routine spectroscopic methods. I effects enantioselective ring-closing metathesis efficiently and with excellent selectivity. Depending on the substitution pattern of the reacting alkenes, either the diene substrate or the cycloalkenyl product can be obtained in >92% ee, corresponding to k_rel of up to 58. 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: 205927-03-3SDS of cas: 205927-03-3).

(S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. 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.SDS of cas: 205927-03-3

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

Catalytic Enantioselective Synthesis of 4-Amino-5-aryltetrahydro-1H-benzo[c]azepines by an Aminoarylation Reaction was written by Akhtar, Sk Samim Md;Hajra, Saumen. And the article was included in Synlett.Name: Copper(II) trifluoromethanesulfonate This article mentions the following:

A one-pot asym. aminoarylation reaction has been executed for the synthesis of trans-4-amino-5-aryltetrahydrobenzo[c]azepines with excellent diastereo- and enantioselectivity (dr > 99: 1; ee ≤97%). The reaction progresses through aziridination of prochiral N-tosyl-N-cinnamylbenzylamines, followed by an intramol. 7-endo-tet Friedel-Crafts cyclization of the tethered aziridines generated in situ, where the combination of Cu(OTf)₂ as a catalyst and PhINNs as a nitrene source was found to be effective. A chiral indenyl bis(oxazoline) was shown to be an efficient ligand for the catalytic enantioselective version of this one-pot transformation. This 7-endo-tetcyclization is contrary to the Baldwin cyclization rules. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Name: Copper(II) trifluoromethanesulfonate).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) 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. 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. Name: Copper(II) trifluoromethanesulfonate

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

Supramolecular heptanuclear Ln-Cu complexes involving nitronyl nitroxide biradicals: structure and magnetic behavior was written by Xi, Lu;Jin, Chao-Yi;Song, Hong-Wei;Wang, Xiao-Tong;Li, Li-Cun;Sutter, Jean-Pascal. And the article was included in Dalton Transactions in 2022.Computed Properties of C10H2CuF12O4 This article mentions the following:

Four novel heptanuclear Ln-Cu complexes with the formula [Ln₂Cu(hfac)₈(NITPhTzbis)₂][LnCu(hfac)₅(NITPhTzbis)]₂ (LnCu = YCu 1, TbCu 2, DyCu 3 and HoCu 4; hfac = hexafluoroacetylacetonate) were successfully constructed by employing the triazole functionalized nitronyl nitroxide biradical ligand NITPh-Tzbis (NITPh-Tzbis = 5-(1,2,4-triazolyl)-1,3-bis(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4,5-hydro-1H-imidazol-2-yl)benzene). These hetero-tri-spin complexes are composed of two biradical-bridged dinuclear [LnCu(hfac)₅(NITPhTzbis)] units and one trinuclear [Ln₂Cu(hfac)₈(NITPhTzbis)₂] unit which form a heptanuclear supramol. structure through π-π interactions. Magnetic susceptibility investigations indicate that ferromagnetic exchange interactions dominate at low temperature for this supramol. system which can be attributed to the Ln-nitroxide exchange and intramol. NIT···NIT coupling mediated by the m-phenylene moiety. The DyCu derivative was found to exhibit a slow magnetic relaxation behavior. 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 evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. 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.Computed Properties of C10H2CuF12O4

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

Copper-catalyzed N-H insertion reactions from sulfoxonium ylides was written by Furniel, Lucas G.;Burtoloso, Antonio C. B.. And the article was included in Tetrahedron in 2020.Synthetic Route of C10H2CuF12O4 This article mentions the following:

The first use of copper(II) as an efficient catalyst for N-H insertion reactions between anilines and α-carbonyl sulfoxonium ylides is described. Products, 39 arylglycine derivatives, were obtained in yields up to 97% employing a simple and fast exptl. procedure. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Synthetic Route 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, low toxicity and inexpensive. 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.Synthetic Route of C10H2CuF12O4

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

Molybdenum Imido Alkylidene Complexes Containing Biphen Ligands that Have Silyl Groups Attached through the 6 and 6′ Methyl Group Carbon Atoms was written by Hultzsch, Kai C.;Bonitatebus, Peter J. Jr.;Jernelius, Jesper;Schrock, Richard R.;Hoveyda, Amir H.. And the article was included in Organometallics in 2001.Electric Literature of C24H34O2 This article mentions the following:

Two new biphenolate ligands were prepared starting from 3,3′-di-tert-butyl-5,5′,6,6′-tetramethyl-2,2′-dimethoxy-1,1′-biphenyl via deprotonation of the 6 and 6′ Me group with KO-t-Bu/n-BuLi, reaction with dichlorodimethylsilane or chlorotrimethylsilane, and deprotection with boron tribromide. Molybdenum imido alkylidene complexes were prepared by treating Mo(NAr)(CHCMe₂Ph)(OTf)₂(DME) with the dipotassium salt of each biphenolate. X-ray crystallog. studies of syn-Mo(NAr)(CHCMe₂Ph)[(rac)-Me₂SiBiphen] and syn-Mo(NAr)(CHCMe₂Ph)[(rac)-TMS₂Biphen] revealed a significantly different geometry of the biphenolate ligands compared to previously structurally characterized four-coordinate biphenolate molybdenum imido alkylidene complexes. The enantiopure complexes were shown to catalyze asym. olefin metathesis with an enantioselectivity comparable to that of Mo(NAr)(CHCMe₂Ph)[(S)-Biphen]. 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: 205927-03-3Electric Literature of C24H34O2).

(S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3) 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 of different valence states can be used to catalyze the coupling reaction, especially the Ullmann coupling reaction. Electric Literature of C24H34O2

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

Cu-Ln compounds based on nitronyl nitroxide radicals: synthesis, structure, and magnetic and fluorescence properties was written by Yang, Meng;Sun, Juan;Guo, Jianni;Sun, Guifang;Li, Licun. And the article was included in CrystEngComm in 2016.Computed Properties of C10H2CuF12O4 This article mentions the following:

Three series of nitronyl nitroxide radical 3d-4f compounds, namely, [Ln(hfac)₃Cu(hfac)₂NIT-5Br-3Py]_n (Ln^III = La (1), Pr (2)), [Ln(hfac)₃Cu(hfac)₂NIT-5Br-3Py] (Ln^III = Gd (3), Tb (4), Dy (5)) and [Ln(hfac)₃Cu(hfac)₂(NIT-5Br-3Py)₂]_n (Ln^III = Gd (6), Tb (7), Dy (8); NIT-5Br-3Py = 2-(5-bromo-3-pyridyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate) have been successfully obtained. Single crystal x-ray crystallog. anal. reveals that complexes 1 and 2 consist of 1D chains built up by Ln(hfac)₃ units bridged by the radical ligands through their NO moieties and the addnl. Cu ions are coordinated to the nitrogen atoms of the radicals. Complexes 3–5 are rare hetero-binuclear Cu-Ln compounds bridged by the nitronyl nitroxide radicals while complexes 6–8 possess one-dimensional chain structures with a repeating [Cu-Rad-Ln-Rad] sequence. DC magnetic studies show ferromagnetic interaction between the Ln^III ion and the coordinated NO group in compounds 3–8. Tb-Cu derivatives (complexes 4 and 7) display frequency dependent ac magnetic susceptibilities, indicating slow magnetic relaxation behavior. The room-temperature photoluminescence spectra of complexes 4 and 7 exhibit strong characteristic emissions in the visible region. 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 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. Computed Properties of C10H2CuF12O4

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

Acid-Catalyzed Decomposition of O-Silylated α-Diazo-β-hydroxy Esters: Access to Mixed Monosilyl Acetals was written by Rouzier, Florian;Montiege, Ophelie;Lhoste, Jerome;Gaulon-Nourry, Catherine;Castanet, Anne-Sophie;Chany, Anne-Caroline. And the article was included in Journal of Organic Chemistry in 2022.Synthetic Route of C2CuF6O6S2 This article mentions the following:

Acid-catalyzed decomposition of diazocarbonyl compounds triggers a wide range of transformations leading to synthetically useful building blocks with high diversity. In this field, the chem. of α-diazo-β-hydroxy ester substrates is largely dominated by migration processes. The authors describe herein a new approach to original mixed monosilyl acetals from O-protected α-diazo-β-hydroxy-β-aryl esters and alcs., catalyzed by trimethylsilyl trifluoromethanesulfonate (TMSOTf). The ratio between these original mixed acetals, the sym. acetals, and the migration products fluctuates depending on the catalyst, the nature of the alcs., and the substituent on the aromatic ring. Fifty-six examples are reported herein with yields up to 71% and diastereoselectivity up to 6:1. Such mixed monosilyl acetals constitute a synthetic equivalent of α-substituted β-oxoesters with high potential for further transformations. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Synthetic Route of C2CuF6O6S2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Synthetic Route of C2CuF6O6S2

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