Day: November 21, 2022

Wang, Zi-Lu published the artcileSynthesis of Structurally Diverse Allylsilanes via Copper-Catalyzed Regiodivergent Hydrosilylation of 1,3-Dienes, Quality Control of 14284-06-1, the publication is Organic Letters (2021), 23(12), 4736-4742, database is CAplus and MEDLINE.

Unprecedented copper-catalyzed regiodivergent hydrosilylation reactions of substituted 1,3-dienes with hydrosilanes have been developed. The 1,2- and 1,4-hydrosilylations of 1-(hetero)aryl-substituted 1,3-dienes were highly selectively controlled via variation of the catalytic systems. Meanwhile, the 1,4-hydrosilylation reaction of 2-aryl-substituted 1,3-dienes with diphenylsilane was also successfully realized for the first time. These methods provide convenient and efficient approaches for the synthesis of structurally diverse allylsilanes.

Organic 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 C7H6Cl2, 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”

Kijima, Ichiro published the artcileReaction of tin(II) chloride with bis(β-diketonato)copper complexes, Computed Properties of 14284-06-1, the publication is Nippon Kagaku Kaishi (1987), 171-3, database is CAplus.

SnCl₂ reacts with [Cu(acac)₂] (Hacac = acetylacetone) in a 2:1 molar ratio to give an oxidative addition product [SnCl₂(acac)₂] and a partial replaced product [SnCl(acac)]. Similar results were also noted in the reaction between SnCl₂ and [Cu(bdm)₂] (Hdbm = dibenzoylmethane). However, only the corresponding oxidative addition product, [SnCl₂(etac)₂], was isolated from the reaction of SnCl₂ with [Cu(etac)₂] (Hetac = Et acetoacetate) under the same reaction conditions. The equimolar reaction of SnCl₂ with [Cu(acac)₂] afforded the oxidative addition product and [Sn(acac)₂], together with the formation of a trace amount of [SnCl(acac)] as the reaction products. The mechanism for the formation of these products is discussed.

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, Computed Properties of 14284-06-1.

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

Matkovic, Marija published the artcileSynthesis of novel adamantyl and homoadamantyl-substituted β-hydroxybutyric acids, Synthetic Route of 14284-06-1, the publication is Molecular Diversity (2013), 17(4), 817-826, database is CAplus and MEDLINE.

Several new adamantyl and homoadamantyl-substituted β;-hydroxybutyric acids, 2-[2-(1-adamantyl)ethyl]-3-hydroxybutyric acid , 2-(3-homoadamantyl)-3-hydroxybutyric acid and 2-(1-homoadamantyl)-3-hydroxybutyric acid , analogs of the 2-(1-adamantyl)-3-hydroxybutyric acid, have been prepared as mixtures of diastereoisomers using selective reduction of corresponding β-keto esters or aldol condensation of the corresponding carboxylic acid and acetaldehyde. The rearrangement of adamantylmethyl and 3-homoadamantyl groups provided entry to both 3-homoadamantyl and 1-homoadamantyl-substituted hydroxy acids resp, relative configurations of diastereoisomers have been determined by NMR spectroscopy comparing the values of coupling constants Adamantyl-substituted β-hydroxybutyric acid has also been prepared in enantiomerically pure form by Evan’s asym. synthesis and the absolute configuration has been determined by X-ray crystallog. Contrary to the long-chain acid, the attempt to prepare short-chain hydroxy acids by the same method failed indicating pronounced sensitivity of the used method to the vicinity of the bulky cage group.

Molecular Diversity 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”

Nizel’skii, Yu. N. published the artcileEffect of the structure of oligomeric glycols on their ability to form complexes with β-diketone complexes of copper, Category: copper-catalyst, the publication is Ukrainskii Khimicheskii Zhurnal (Russian Edition) (1984), 50(5), 535-9, database is CAplus.

Stability constants for Cu(eacac)₂ (eacac = ethylacetoacetate) complexes with polyoxyethylene glycols, polyoxypropylene glycols, or polyoxytetramethylene glycols were determined spectrophotometrically in PhCl solution at 288-333 K. Thermodn. parameters for complexation (ΔH, ΔS, ΔG) were calculated The oligomeric glycol occupies 1 coordination site (the 5th position) on Cu(eacac)₂ complexes. The molar extinction coefficients are independent of the degree of association of the oligomeric glycols.

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, Category: copper-catalyst.

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

Nizel’skii, Yu. N. published the artcileComplex formation of copper ethylacetoacetate with poly(hydroxyethylene glycol), SDS of cas: 14284-06-1, the publication is Teoreticheskaya i Eksperimental’naya Khimiya (1982), 18(5), 583-90, database is CAplus.

Complexation of CuL₂ (HL = Et acetoacetate) with polyethylene glycol (mol. weight ∼300), diethylene glycol di-Et ether (I) and ethylene glycol mono-Et ether (II) was studied spectrophotometrically at 283-333 K. Associates with I and II were also characterized by determining IR spectra. Thermodn. parameters were calculated for 1:1 CuL₂:glycol complex formation. More stable complexes are formed with OH groups than with ether O. These complexes can serve as models for metal diketonate complex catalysts for formation of urethane polymers.

Teoreticheskaya i Eksperimental’naya 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, SDS of cas: 14284-06-1.

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

Gunji, Takahiro published the artcilePreparation of YBCO and BSCCO superconducting thin films by a new chemical precursor method, Application In Synthesis of 14284-06-1, the publication is Bulletin of the Chemical Society of Japan (2005), 78(1), 187-191, database is CAplus.

Homogeneous YBa₂Cu₃O_7-δ (YBCO) and Bi₂SrCa₂Cu₂O_8+y (BSCCO) precursors were prepared by the reaction of triethanolamine with Et acetoacetato complexes of Y, Ba, and Cu and those of Bi, Sr, Ca, and Cu, resp. These precursors showed melt-spinnability and converted to ceramics on heating with the elimination and combustion of organic groups. Superconductive thin films were prepared by depositing a solution on a substrate by spin-coating, followed by calcination. Epitaxial growth of the YBCO phase, with c axis normal to the substrate, was observed The critical temperature was 88.7 K and the critical c.d. at 77 K and 0 T was 5 × 10⁵ A/cm². On the other hand, the epitaxial growth of the c axis aligned BSCCO phase was observed: the critical temperature was 77 K and the critical c.d. at 5 K was 6 × 10⁴ A/cm².

Bulletin of the Chemical Society of Japan 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”

Morris, Robert E. published the artcileInfluences exerted by metal deactivator on the thermal stability of aviation fuel in the presence of copper, Recommanded Product: Copper(II) ethylacetoacetate, the publication is Fuel Science & Technology International (1990), 8(4), 327-50, database is CAplus.

Metal deactivator additives (MDA) exert a strong stabilizing effect on fuels when tested in the Jet Fuel Thermal Oxidation Tester (JFTOT). At low concentrations, MDA were very effective in the JFTOT in reducing insoluble reaction products but had no significant effect on fuel oxidation In the presence of dissolved Cu, MDA reduced tube deposition over regions of the tube at >250°. The deposits formed in the presence of Cu at lower temperatures, which were not reduced by MDA, contain a high concentration of Cu. MDA also partially counteracted the catalytic effects of dissolved Cu on fuel autoxidation

Fuel Science & Technology International 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”

Johnson, P. R. published the artcileElectronic spectra of copper(II) β-ketoenolates. Intraligand and charge transfer transitions, Category: copper-catalyst, the publication is Journal of Molecular Structure (1975), 29(1), 97-103, database is CAplus.

The electronic spectra in (MeOH) of the Na salts and Cu(II) complexes of 13 β-diketones are reported within the energy range 25-48 kkaysers. Spectra of the Na salts of ligands with alkyl substituents exhibit 1 band which is assigned to the π3→π4 intraligand transition. Where aryl substituents are present, an addnl. benzenoid band is observed The spectra of the Cu complexes exhibit 2 bands whether aryl substituents are present or not. The band of lower energy is assigned to the π3→π4 transition and the band of higher energy to the σL→3dxy charge transfer transition. Intensity relations suggest that, where aryl substituents are present, the benzenoid band is superimposed on the charge transfer band. The observed transition energies exhibit a good level of agreement with those predicted by Hueckel MO calculations Comparison of the π3→π4 transition energies of the Cu complexes with those available for the β-ketoenolates of other metal ions supports indications from ESR spectra that there is very little π-orbital overlap in the Cu-O bonds.

Journal of Molecular Structure 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, Category: copper-catalyst.

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

Petkov, I. published the artcileUV and IR study of gamma-ray and fast electron beam initiated prototropic and metallotropic tautomerization of some β-dicarbonyl compounds and their Cu chelates in solution and in polymer (PVC) film, Recommanded Product: Copper(II) ethylacetoacetate, the publication is Radiation Physics and Chemistry (1995), 45(1), 121-30, database is CAplus.

The radiation induced keto-enol and chelate-carbeniate tautomerization of some β-dicarbonyl compounds and their copper complexes is studied in solution and in polymer (PVC) film. The samples are subjected to irradiation using a ⁶⁰Co source. The effects of the kGy doses in air on the percentage of the enol or chelate forms are investigated with UV- and IR-spectral methods. These radiation induced processes are discussed in terms of the mechanism proposed previously for the photoinduced ketonization and metallotropy of β-dicarbonyl compounds

Radiation Physics and 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”

Rosenberg, Douwe published the artcileChemotherapeutic nitroheterocycles, XXVI. 5-Nitro-2-thiazolylpyrazoles and 5-nitro-2-thiazolylisoxazoles from 1,3-dicarbonyl compounds of the nitrothiazole series, COA of Formula: 0, the publication is Justus Liebigs Annalen der Chemie (1976), 13-21, database is CAplus.

5-Nitro-2-thiazolecarbonyl chloride (I) reacted with copper chelates II (R = EtO, Me, Ph, 4-ClC6H4, 2-furyl, 2-thienyl) to give 65-99% 1,3-dicarbonyl compounds III with a 5-nitro-2-thiazolyl moiety. III (R = Me, Ph) reacted with substituted hydrazines or hydroxylamine H2NXH (X = NH, NMe, NCH2CH2OH, NPh, O) to give 26-96% the title pyrazoles IV and (or V) (X = NH or substituted NH) or isoxazoles IV and(or) V (X = O). Some III have good antimicrobial activity (no data), but are very toxic and corrosive to the skin.

Justus Liebigs Annalen der Chemie 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, COA of Formula: 0.

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