Category: copper-catalyst

Ma, Kai published the artcileCoupling reaction of dimethyl succinate and ethylene carbonate over metal ethyl acetoacetate complexes, Synthetic Route of 14284-06-1, the publication is Jingxi Huagong (2013), 30(6), 624-627, database is CAplus.

A new technol. of coupling reaction was studied, by which the simultaneous synthesis of poly (ethylene glycol succinate) oligomers and di-Me carbonate (DMC) was realized by the coupling reaction of ethylene carbonate (EC) and di-Me succinate (DMSu) over various metal Et acetoacetate complexes. Zn (EAA)₂ as catalyst had the highest catalytic activity for the coupling reaction. The preferable reaction conditions were as follows: reaction temperature 205-215°C, molar ratio of EC to DMSu 4, molar ratio of catalyst to the total mass of EC and DMSu 0.001, reaction time 1 h. Under such conditions, the yield of DMC was 52.3%, and the intrinsic viscosity [η] of poly (ethylene glycol succinate) oligomer was 0.1174 dL/g.

Jingxi Huagong published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Synthetic Route of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Okushi, Tsuneo published the artcileReaction of triphenylboroxine with diethyl ethylidenemalonate in the presence of bis(ethoxycarbonylacetonato)copper(II), Safety of Copper(II) ethylacetoacetate, the publication is Nippon Kagaku Kaishi (1975), 1435-8, database is CAplus.

The reaction of triphenylboroxine with di-Et ethylidenemalonate in the presence of bis(ethoxycarbonylacetonato)copper(II) was investigated. When the reaction was carried out in pyridine, Cu powder precipitated and Cu(I) pentaborate-pyridine(1/6) crystallized From the filtrate, benzene (69.7%), biphenyl (13.9%) and 1-phenylethylmalonic acid (7.5%) were obtained. Several byproducts were also identified. Possible pathways for the formation of these products were suggested. The formation of biphenyl and 1-phenylethylmalonic acid was explained by a radical mechanism. By use of a large excess of di-Et ethylidenemalonate as solvent, 1-phenylethylmalonic acid was obtained in a 55.7% yield.

Nippon Kagaku Kaishi published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Safety of Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Berzate, A. published the artcileCatalytic activity of chlorides and acetylacetonates in alkoxy exchange, Formula: 0, the publication is Latvijas PSR Zinatnu Akademijas Vestis, Kimijas Serija (1975), 186-8, database is CAplus.

The catalytic activity of 19 metal chlorides MCln and 16 metal acetylacetonato complexes M(aa)n in the alkoxy exchange reaction: PhSi(OMe)3 + 3C7H15OH → 3MeOH + PhSi(OC7H15)3 are listed. The activity trend is analogous to that of catalytic activity in the Friedel-Crafts reaction and is the trend of Lewis-acid strength.

Latvijas PSR Zinatnu Akademijas Vestis, Kimijas Serija published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Formula: 0.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Khudorozhko, G. F. published the artcileX-ray electronic study of the charge state of the central atom of aluminum(III) and copper(II) β-diketonates, Application In Synthesis of 14284-06-1, the publication is Koordinatsionnaya Khimiya (1980), 6(3), 358-60, database is CAplus.

The change was studied of the charge of the central atom of β-diketonates of Al and Cu by measurement of the binding energies of the Al 2p and Cu 3p levels by the method of x-ray electron spectroscopy. The additivity was established by contributions of terminal group to the chem. shifts. There is a correlation of these shifts with the volatility of the compounds studied. The compounds studied were (R’COCHOCR”)₃Al(III) and (R’COCHOCR”)₂Cu(II), where R’ and R” are Me, CMe₃, CF₃, Ph, etc.

Koordinatsionnaya Khimiya published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Application In Synthesis of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Kozak, N. V. published the artcileEffect of Cu bis(ethylacetoacetate) on rotational diffusion of paramagnetic probe TEMPO and thermooxidative degradation of polyurethane-PMMA semi-IPN, Application In Synthesis of 14284-06-1, the publication is Ukrainskii Khimicheskii Zhurnal (Russian Edition) (2005), 71(7-8), 122-127, database is CAplus.

Adding of copper bis(ethylacetoacetate) (CuAc) to PMMA-polyurethane semi-IPN was accompanied by the decrease in activation energy and rotational diffusion of the paramagnetic probe TEMPO. Thermooxidative degradation and structural changes of semi-IPN depend on the metal ion valency. Thermogravimetric anal. indicates slowing down of degradation of semi-IPN in the presence of CuAc at the initial stages. Increase of the amount of CuAc to 5% leads to the increased rate of degradation at >330°.

Ukrainskii Khimicheskii Zhurnal (Russian Edition) published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Application In Synthesis of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Shmyreva, Zh. V. published the artcileEffect of transition metal diketonates on oxidation of sunflower-seed oil, Quality Control of 14284-06-1, the publication is Russian Journal of Applied Chemistry (Translation of Zhurnal Prikladnoi Khimii) (2003), 76(11), 1862-1863, database is CAplus.

Effect of transition metal (Mn, Fe, Co, Ni, Cu, Zn) diketonates on the oxidation of sunflower-seed oil with atm. oxygen was studied. Some of the complexes acted as catalysts and the others as antioxidants.

Russian Journal of Applied Chemistry (Translation of Zhurnal Prikladnoi Khimii) published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is C10H9NO, Quality Control of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Alonso, Miguel E. published the artcileStudies on the origin of dihydrofurans from α-diazocarbonyl compounds. Concerted 1,3-dipolar cycloaddition vs. nonsynchronous coupling in the copper chelate catalyzed reactions of α-diazodicarbonyl compounds with electron-rich olefins, Synthetic Route of 14284-06-1, the publication is Journal of Organic Chemistry (1982), 47(19), 3747-54, database is CAplus.

The Cu chelate catalyzed thermolysis of alkyl 2-diazo-3-oxobutyrate and of 3-diazo-2,4-pentanedione in the presence of vinyl ethers, to give 4-(alkoxycarbonyl)- and 4-acyl-2,3-dihydrofurans, is used to probe the mechanism of this transformation in terms of the concerted 1,3-dipolar cycloaddition of the metal-oxocarbene complex vs. the initial formation of the cyclopropane followed by 1,3-sigmatropic rearrangement to the heterocycle. Evidence is presented in favor of a third possibility, namely, that of a nonsynchronous stereospecific addition of the metal-carbene to the olefinic substrate which accounts for the formation of cyclopropanes, dihydrofurans, and products of apparent allylic C-H insertion and cyclopropane structural isomerization from a common intermediate. This mechanism is supported by a study of the addition of Et 2-diazo-3-oxobutyrate to benzo[b]furan.

Journal of Organic Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Synthetic Route of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Maruyama, Kazuhiro published the artcileCopper(II)-catalyzed cyclization of azidoalkadienylquinones. Stereoselective formation of dihydropyrroloindoloquinones and the related quinolinoquinone, Synthetic Route of 14284-06-1, the publication is Chemistry Letters (1987), 97-100, database is CAplus.

Azidoalkadienylquinones (e.g., I; n = 1,2) cyclized in the presence of Cu(acac)₂ (acac = acetylacetonate) to stereoselectively give up to 48% dihydropyrroloindolediones and -quinolinediones (e.g., II; n = 1,2). In the absence of Cu(acac)₂ cyclization did not occur. Evaluation of other metal salts and ligands showed Cu(acac)₂ had the best catalytic activity.

Chemistry Letters published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Synthetic Route of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Naruta, Yoshinori published the artcileCopper-catalyzed double cyclization reaction of azidoquinones: one-step synthesis of dihydropyrroloindoloquinones and related quinolinoquinones, Recommanded Product: Copper(II) ethylacetoacetate, the publication is Journal of Organic Chemistry (1987), 52(18), 3956-67, database is CAplus.

Intramol. cyclization of azido(pentadienyl)quinone I (R = H) has been examined in the presence of metal salts, e.g., ML_n (M = Cu, Mn, Co, etc.; L = acetylacetonato). Copper or CuL₂ exhibited the highest catalytic activity both to the decomposition of the azide and to the formation of the corresponding dihydropyrroloindoloquinone II (R = H) which was obtained in 58% yield in one step. The related azido(hexadienyl)quinones gave the corresponding quinolinoquinone derivatives in moderate yields. Thus, pyrolysis of hexadienylquinone derivative I (R = Me) in benzene in the presence of CuL₂ afforded 27% quinolinoquinone. The double cyclization reaction proceeds with extremely high regio- and stereoselectivity, and the generality was established. Quinonoid structures and the presence of a conjugated dienyl side chain at the proximal position to an azide group are essential for the completion of this double cyclization reaction. The role of the copper catalyst to the cyclization reaction is also discussed.

Journal of Organic Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Recommanded Product: Copper(II) ethylacetoacetate.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Palaniandavar, M. published the artcileSpectral and electrochemical behavior of some copper(II) complexes with CuO₄ chromophore, Synthetic Route of 14284-06-1, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (1995), 34A(10), 803-8, database is CAplus.

A few mixed ligand complexes [Cu(TCA)(L)] [where TCA = trichloroacetate; HL = 2,2,6,6-tetramethyl-3,5-heptanedione (DPM), 2,6-dimethyl-3,5-heptanedione (DMHD) and o-hydroxybenzophenone (OHBP)] were prepared and characterized by IR, electronic and EPR spectra and compared with those of the corresponding CuL₂ and other [Cu(TCA)(L)] chelates [where HL = acetylacetone (ACAC), ethylacetoacetate (EAA), salicylaldehyde (SAL) and o-hydroxyacetophenone (OHAP)] to illustrate the nature of bonding of TCA with Cu(II). The Cu^II/Cu^I redox potentials of the bis-chelates vary in the order, DPM < MDHD < ACAC < EAA; SAL ≈ OHAP < OHBP; they shift towards more neg. values as the number of electron repelling Me groups increases. For mixed ligand complexes, the potentials are more pos. than those of their resp. bis-complexes and vary in the order, DPM > DMHD > ACAC > EAA; SAL < OHAP < OHBP. All the above results suggest that the replacement in L in CuL₂ by TCA decreases the delocalization of electron d., more in o-hydroxyarylcarbonyl rather than in β-diketonate complexes.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is 0, Synthetic Route of 14284-06-1.

Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”