Day: February 22, 2023

Synthesis of Molybdenum Imido Alkylidene Complexes That Contain 3,3′-Dialkyl-5,5′,6,6′-tetramethyl-1,1′-biphenyl-2,2′-diolates (Alkyl = t-Bu, Adamantyl). Catalysts for Enantioselective Olefin Metathesis Reactions was written by Alexander, John B.;Schrock, Richard R.;Davis, William M.;Hultzsch, Kai C.;Hoveyda, Amir H.;Houser, Jeffrey H.. And the article was included in Organometallics in 2000.Category: copper-catalyst This article mentions the following:

Two 3,3′-dialkyl-5,5′,6,6′-tetramethyl-1,1′-biphenyl-2,2′-diols (alkyl = t-Bu, 1-adamantyl) were prepared in two steps and resolved as the menthol phosphate derivative Addition of the dipotassium salt of each biphenolate to various Mo(N-Aryl)(CHR)(OTf)₂(DME) complexes produced racemic and enantiopure compounds Mo(N-aryl)(CHR)(biphenolate). X-ray crystallog. studies of syn-Mo(N-2,6-i-Pr₂C₆H₃)(CHCMe₂Ph)[(S)-Biphen] and syn-Mo(N-2-CF₃C₆H₄)(CHCMe₃)[(S)-Biad](pyridine) proved the absolute stereochem. of the biphenolate ligands. Neophylidene and neopentylidene complexes have predominantly the syn conformation in solution The [syn]/[anti] equilibrium constant for Mo(N-Aryl)(CHR)[Biphen] complexes increased in magnitude with decreasing size of the arylimido ligand, and decreased upon reducing the steric bulk of the alkylidene substituent. The rates of exchange of syn and anti isomers, as determined by single-parameter line shape anal. and by spin saturation transfer, are on the order of ∼1 s^-1 at 22°. 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: 205927-03-3Category: copper-catalyst).

(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. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. Category: copper-catalyst

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

Microwave-assisted copper-catalyzed stereoselective ring expansion of three-membered heterocycles with α-diazo-β-dicarbonyl compounds was written by Li, Siqi;Chen, Xingpeng;Xu, Jiaxi. And the article was included in Tetrahedron in 2018.Recommanded Product: 14781-45-4 This article mentions the following:

Microwave-assisted copper-catalyzed stereoselective ring expansions of three-membered heterocycles with α-diazo-β-dicarbonyl compounds were investigated. Reaction of mono-substituted and cis-2-R¹-3-R²-substituted thiiranes [R¹ = H, R² = n-Bu, n-hexyl, PhCH₂CH₂; R¹R² = (CH₂)₄] with α-diazo-β-dicarbonyl compounds R³C(O)C(:N₂)C(O)R⁴ [R³ = Me, R⁴ = MeO, EtO; R³R⁴ = (CH₂)₃, CH₂CMe₂CH₂] generated the corresponding 3-acyl-5,6-dihydro-1,4-oxathiines and trans-3-acyl-5,6-dihydro-1,4-oxathiines I with high stereospecificity through an intramol. SN2 process. In the presence of copper(II) hexafluoroacetylacetonate, mono-substituted and cis-2-R⁵-3-R⁶-substituted oxiranes [R⁵ = H, R⁶ = Ph, PhCH₂, PhCH₂CH₂, PhOCH₂, etc.; R⁵R⁶ = (CH₂)₄, (CH₂)₆] and α-diazo-β-dicarbonyls R⁷C(O)C(N₂)C(O)R⁸ (R⁷ = Me, R⁸ = Me, MeO, EtO, Ph; R⁷ = Ph, R⁸ = EtO) gave rise to 2-acyl-5,6-dihydro-1,4-dioxines and cis-3-acyl-5,6-dihydro-1,4-dioxines II stereoselectively via an intimate ion-pair mechanism. The current method provides a direct and simple strategy in efficient preparation of 3-acyl-5,6-dihydro-1,4-oxathiines and 2-acyl-5,6-dihydro-1,4-dioxines, which are important agents in medicinal and agricultural chem., from readily available thiiranes and oxiranes, resp. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Recommanded Product: 14781-45-4).

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. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Recommanded Product: 14781-45-4

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

Thermal atomic layer etching of copper by sequential steps involving oxidation and exposure to hexafluoroacetylacetone was written by Mohimi, Elham;Chu, Xiaoqing I.;Trinh, Brian B.;Babar, Shaista;Girolami, Gregory S.;Abelson, John R.. And the article was included in ECS Journal of Solid State Science and Technology in 2018.Category: copper-catalyst This article mentions the following:

We describe an at. layer etching (ALE) method for copper that involves cyclic exposure to an oxidant and hexafluoroacetylacetone (Hhfac) at 275°C. The process does not attack dielecs. such as SiO2 or SiNx, and the surface reactions are kinetically self-limiting to afford a precise etch depth that is spatially uniform. Exposure of a copper surface to mol. oxygen, O2, a weak oxidant, forms a ∼0.3 nm thick layer of Cu2O, which is removed in a subsequent step by exposure to Hhfac. The etch reaction involves disproportionation of Cu(hfac) intermediates, such that ∼0.09 nm copper is removed per cycle. Exposure of copper to ozone, a stronger oxidant, affords ∼15 nm of CuO; when this oxidized surface is exposed to Hhfac, 8.4 nm of copper is removed per cycle. The etch products, Cu(hfac)2 and H2O, are efficiently pumped away; H2O, a poor oxidant, does not attack the bare Cu surface. The roughness of the copper surface increases slowly over successive etch cycles. Thermochem. and bulk etching data indicate that this approach should work for a variety of other metals. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Category: copper-catalyst).

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. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Category: copper-catalyst

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

Nanometer-thick copper films grown by thermal atomic layer deposition was written by Zhong, Zhenyu;Wang, Xiuqin;Ding, Jianning;Yuan, Ningyi. And the article was included in Thin Solid Films in 2015.Related Products of 14781-45-4 This article mentions the following:

Because of the superior properties of copper, it has been of great interest as a conducting material to replace aluminum in device manufacturing In this study, we investigated the influence of substrate temperature, film thickness, and rapid thermal annealing (RTA) on the deposition of Cu films of thickness less than 10 nm. Compared to thicker films, the elec. properties of nanometer-thick films were found to be very sensitive to the deposition temperature Further, we determined the optimal deposition temperature to obtain low-resistivity nanometer-thick Cu films. The Cu films were deposited with island-type growth, and the interconnection between grains plays a major role in the resistivity of the films. We also determined the critical thickness at which Cu films exhibit continuous growth as 8 nm. After RTA, the film color darkened, electron scattering became weak, and the resistivity reduced more than 20% with annealing at 300-350 °C, because of the growth of Cu grains. The results of this study indicate that thermal ALD can be used in conjunction with RTA to produce low-resistivity Cu thin films, the thickness, uniformity, and conformality of which can be easily controlled. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Related Products of 14781-45-4).

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 nanoparticles can also catalyze the coupling reaction of phenols, thiols, xanthogenates, nitrogen-containing nucleophiles, selenium ruthenium nucleophiles and the like.Related Products of 14781-45-4

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

Divergent reactivity of α-azidochalcones with metal β-diketonates: tunable synthesis of substituted pyrroles and indoles was written by Rajaguru, Kandasamy;Mariappan, Arumugam;Muthusubramanian, Shanmugam;Bhuvanesh, Nattamai. And the article was included in Organic Chemistry Frontiers in 2017.Electric Literature of C10H2CuF12O4 This article mentions the following:

A divergent reactivity of α-azidochalcones with metal β-diketonates for the synthesis of substituted pyrroles and indoles was described. Metal β-diketonates were applied as bifunctional reactive partners. With a copper complex, the synthesis of substituted pyrroles in micellar media via 2H-azirine intermediates was achieved under mild conditions, while with Fe(acac)₂ as a catalyst, the reaction proceeded smoothly to yield indoles regioselectively. 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 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.Electric Literature of C10H2CuF12O4

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

Synthesis, crystal structures and magnetic properties of a P-stereogenic ortho-(4-amino-tempo)phosphinic amide radical and its Cu^II complex was written by Navarro, Yolanda;Guedes, Guilherme P.;del Aguila-Sanchez, Miguel A.;Iglesias, Maria Jose;Lloret, Francisco;Lopez-Ortiz, Fernando. And the article was included in Dalton Transactions in 2021.Formula: C10H2CuF12O4 This article mentions the following:

The synthesis of phosphinic amides containing one 4-amino-TEMPO substituent at the ortho position was achieved through copper(I) catalyzed cross-coupling reactions of ortho-iodophosphinic amides with 4-amino-TEMPO. The method was extended to the preparation of the first example of a P-stereogenic ortho-(4-amino-tempo)phosphinic amide radical 10. The reaction of 10 with Cu(hfac)₂ afforded the P-stereogenic Cu^II complex 19. The crystal structure of both chiral compounds is reported. The mol. structure of 10 consists of a supramol. zigzag chain formed by intermol. hydrogen bonds between the NH group of the phosphinic amide moiety and the nitroxide oxygen atom. In complex 19, the ligand acts as a bridge between two Cu^II ions coordinated to the oxygen atoms of the P=O and N-O· groups giving a polymeric helicate chain in which the metal ions exist in a distorted octahedral geometry. The magnetic behavior of ligand 10 was characterized by very weak intermol. antiferromagnetic interactions, whereas ferro- and anti-ferromagnetic interactions are present in complex 19. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Formula: 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. 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.Formula: C10H2CuF12O4

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

Copper-Catalyzed Three-Component Aminofluorination of Alkenes and 1,3-Dienes: Direct Entry to Diverse β-Fluoroalkylamines was written by Feng, Guangshou;Ku, Colton K.;Zhao, Jiaqi;Wang, Qiu. And the article was included in Journal of the American Chemical Society in 2022.COA of Formula: C10H2CuF12O4 This article mentions the following:

Rapid and efficient access to structurally diverse β-fluoroalkylamines is in high demand, due to their wide presence and great importance in medicinal chem. and drug development. Direct 1,2-aminofluorination of alkenes offers an ideal strategy for one-step entry to β-fluorinated amines from readily available starting materials. Yet the synthesis of valuable β-fluorinated alkylamines remains an unsolved challenge, due to the inherent incompatibility between electrophilic fluoride sources and the electron-rich alkylamines. Herein, an unprecedented, catalytic, three-component aminofluorination of diverse alkenes and 1,3-dienes, which has been achieved by an innovative copper-catalyzed electrophilic amination strategy using O-benzoylhydroxylamines as alkylamine precursors, is reported. The use of Et₃N·3HF is also critical, not only as a com. available and inexpensive fluoride source to enable effective fluorination but also as an acid source for the formation of aminyl radical cations for electrophilic amination. Mechanistic experiments suggest the involvement of aminyl radical species and carbon-radical intermediates under reaction conditions. This method features high regioselectivity and good tolerance of diverse functional groups and provides a practical and direct entry to a broad range of β-fluorinated electron-rich alkylamines. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4COA of Formula: C10H2CuF12O4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) 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 nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.COA of Formula: C10H2CuF12O4

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

Polymer-stretching photoluminescent regulation by doping a single fluorescent molecule was written by Gu, Fan;Li, Yuanhao;Jiang, Tao;Su, Jianhua;Ma, Xiang. And the article was included in CCS Chemistry in 2022.Recommanded Product: Copper(II) trifluoromethanesulfonate This article mentions the following:

Photoluminescent materials play an essential part in the application of polymer systems. However, intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescent regulation. A novel photoluminescent mechanism called vibration-induced emission (VIE) has recently garnered considerable attention due to its multicolor fluorescence from a single mol. entity. Based on the unique fluorescent properties of VIE mols., we have doped 9,14-diphenyl-9,14-dihydrodibenzo[a, c]-phenazine (DPAC) and its derivative DPAC11-carbonitrile in two stretchable polymers, poly (ε-caprolactone) and ethylene vinyl acetate (EVA) copolymer, to explore the important relationship between luminophores and polymer systems. This research focuses on the multicolor photoluminescence of the blend films that result from stretching exertions and temperature responses. The successive conformational alterations of VIE mols. endow continuous photoluminescent changes. Meanwhile, the multicolor variations also provide specific visual evidence regarding the amplified tensile stresses and microstructural changes in the polymer. This demonstration therefore provides advantageous insight into the development of functional optical materials. 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 applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. 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) trifluoromethanesulfonate

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

A new mononuclear terbium and copper cocrystalline nitronyl nitroxide complex: synthesis, structure and magnetic properties was written by Shi, Jian Yun;Ma, Zhi Long;Tian, Li. And the article was included in Journal of Molecular Structure in 2021.Application of 14781-45-4 This article mentions the following:

One 2p-3d-4f multispin complex [Cu(hfac)(4-Me-3-NITtrz)₂][Tb(hfac)₄]·H₂O (1) was obtained based on a functionalized nitronyl nitroxide radical 4-Me-3-Nit-trz (in which, 4-Me-3-Nit-trz = 2-[3-(4-methyl-l,2,4-triazolyl)]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac = hexafluoroacetylacetone). Complex 1 crystallizes in tetragonal system, I4 space group. The central Cu^II ion is six-coordinated in tensile octahedron configuration finished by two bidentate radical ligands and one bidentate hfac anion, while Tb^III ion exhibited as distorted triangular dodecahedron geometry (D_2d) finished by eight oxygen atoms from four bischelate hfac anions. Magnetic studies show that Cu(II) ion and the NO group are antiferromagnetically coupled with coupling constants of J_Cu-rad = 1.76-1.99 cm^-1, and strong antiferromagnetic exchange interactions between the two intramol. radicals with J_rad-rad = -12.88∼-10.42 cm^-1 exist in 1. In addition, a.c. magnetic susceptibilities were further measured. 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. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, low toxicity and inexpensive. 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”

An asymmetric hydroformylation catalyst that delivers branched aldehydes from alkyl alkenes was written by Noonan, Gary M.;Fuentes, Jose A.;Cobley, Christopher J.;Clarke, Matthew L.. And the article was included in Angewandte Chemie, International Edition in 2012.SDS of cas: 205927-03-3 This article mentions the following:

A rhodium-catalyzed asym. hydroformylation of terminal alkenes in presence of a phosphine-phosphite chiral ligand is described. Branched chiral aldehydes were obtained in good to excellent enantioselectivities using this strategy. 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. 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.SDS of cas: 205927-03-3

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