Catalysis-chemistry

Roe, Stephen P. published the artcileCorrelation of x-ray photoelectron spectroscopic core level binding energies with melting point for a series of diamine dihydrochlorides, HPLC of Formula: 10517-44-9, the publication is Proceedings – Indian Academy of Sciences, Chemical Sciences (1985), 95(4), 397-408, database is CAplus.

XPS and DTA studies of a series of diamine dihydrochlorides showed that a linear relation exists between the Ni(1s) and Cl(2p_3/2) binding energy shifts and the m.ps. of these salts. A theor. model is presented to verify this empirical correlation. Such binding energy shifts and m.ps. are also dependent upon intrinsic electronic and bonding features of these salts such as quaternary N substituent inductive effects, charge delocalization within the cation, cation-anion interaction, and salt hydration.

Proceedings – Indian Academy of Sciences, Chemical Sciences published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, HPLC of Formula: 10517-44-9.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Schmaderer, Harald published the artcilePhotooxidation of benzyl alcohols with immobilized flavins, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, the publication is Advanced Synthesis & Catalysis (2009), 351(1+2), 163-174, database is CAplus.

Benzyl alcs. I [X = OMe, H, CO₂Na, CO₂Me, CO₂H] are oxidized cleanly and efficiently to the corresponding aldehydes II under irradiation using flavin photocatalysts, e.g., III [R¹ = R² = (CH₂)₂(CF₂)₇CF₃; R¹ = CH₂CH₂OMe, R² = Me, (CH₂)₂(CF₂)₇CF₃] and IV [R³ = H, Me, R⁴ = Ac; R³ = Me, R⁴ = C(:O)(CH₂)₁₄Me] and aerial oxygen as the terminal oxidant in homogeneous aqueous solution Turnover frequencies (TOF) of more than 800 h^-1 and turnover numbers (TON) of up to 68 were obtained. Several flavin photocatalysts with fluorinated or hydrophobic aliphatic chains were immobilized on solid supports like fluorous silica gel, reversed phase silica gel or entrapped in polyethylene pellets. The catalytic efficiency of the heterogeneous photocatalysts was studied for the oxidation of different benzyl alcs. in water and compared to the analogous homogeneous reactions. Removal of the heterogeneous photocatalyst stops the reaction conversion immediately, which shows that the immobilized flavin is the catalytically active species. The immobilized catalysts are stable, retain their reactivity if compared to the corresponding homogeneous systems and are easily removed from the reaction mixture and reused. TOF of up to 26 h^-1, TON of 280 and up to 3 reaction cycles without loss of activity are possible with the heterogeneous flavin photocatalysts.

Advanced Synthesis & Catalysis published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Application of 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Abdallah, Mira published the artcileCoumarin Derivatives as Photoinitiators in Photo-Oxidation and Photo-Reduction Processes and a Kinetic Model for Simulations of the Associated Polymerization Profiles, Safety of 4-Nitrophenylacetic acid, the publication is ACS Applied Polymer Materials (2020), 2(7), 2769-2780, database is CAplus.

In this work, the design of an original series of coumarin derivatives (CoumC1-CoumC13) is presented. Chem. structures of these coumarins were selected by mol. modeling to ensure both excellent light absorption properties and high potential photoreactivity (high excited-state energy). As a striking result of this in silico design, eight of the 13 proposed coumarins were never presented and were specifically proposed for this work, indicating the interest in their structures. New multicomponent photoinitiating systems (PISs) based on these coumarins are proposed for the free radical polymerization (FRP) of (meth)acrylates and examined upon visible light irradiation using a light-emitting diode (LED) as a safe and economical irradiation source. The proposed systems are based on coumarins that act as remarkable photoinitiators/photosensitizers (PIs/PSs) combined with N-phenylglycine (NPG) and/or iodonium salt (Iod) as co-initiators to generate the reactive species (radicals) that will initiate the photopolymerization reaction. Investigations of the chem. mechanisms suggested by the different interactions that take place as well as the photophys. and photochem. properties of coumarins are provided. It is possible to obtain high polymerization rates (R_p), excellent photoinitiating abilities, and great reactive function conversions (FC) with these structures based on the coumarin core. Coumarins show high efficiency for the FRP of (meth)acrylates by reaction with iodonium salt (a photo-oxidation process) or with amine (a photo-reduction process). These compounds were used in three-dimensional (3D) printing resins but also for the preparation of photocomposites. In this latter case, excellent depth of cure was noted as remarkable behavior. To rationalize the exptl. results, a kinetic model for a three-component system has been established to analyze the role of oxygen in the monomer conversions and the conversion enhancement observed while using an amine as a co-initiator.

ACS Applied Polymer Materials published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C8H7NO4, Safety of 4-Nitrophenylacetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Pazoki, Farzane published the artcileMagnetic acyclovir-copper nanoparticle: DFT study and application as an efficient, magnetically separable and recyclable catalyst for N-arylation of amines under green condition, Quality Control of 1821-27-8, the publication is Inorganic Chemistry Communications (2020), 108240, database is CAplus.

A copper(I)-acyclovir complex supported on magnetic was designed and successfully synthesized. Catalytic activity and stability of two structures of copper(I)-acyclovir complex supported on magnetic were investigated by the theor. method. The more active and stable copper(I)-acyclovir complex supported on magnetic was applied as a catalyst for C-N cross-coupling reaction with high yield in a deep eutectic solvent (DES) as a green solvent. Also, these nanoparticles could be easily recovered and reused for new rounds of reaction without any considerable loss in catalytic activity.

Inorganic Chemistry Communications published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Quality Control of 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kim, Jaeseung published the artcileSilanediol Inhibitors of Angiotensin-Converting Enzyme. Synthesis and Evaluation of Four Diastereomers of Phe[Si]Ala Dipeptide Analogues, Safety of Difluorodiphenylsilane, the publication is Journal of Organic Chemistry (2005), 70(15), 5781-5789, database is CAplus and MEDLINE.

Phe-Ala silanediol dipeptide mimics I as four diastereoisomers [(S,S)-, (S,R)-, (R,R)- and (R,S)-I] have been evaluated as inhibitors of angiotensin-converting enzyme (ACE) and compared to ketone-based inhibitors II reported by Almquist et al. One stereogenic center of the isomers was derived from the individual enantiomers of Me 3-hydroxy-2-methylpropionate, with separation of diastereomers after introduction of the second stereogenic center. The diastereomeric identities were established by x-ray crystallog. of an intermediate. Inhibition of ACE by (S,S)-I, (R,R)-I, (R,S)-I diastereomers (IC₅₀ = 3.8 – 207 nM) closely paralleled that of the corresponding diastereomeric ketones II (IC₅₀ = 1.0 – 46 nM). (S,R)-I, corresponding to the least inhibitory ketone (IC₅₀ = 3200 nM), exhibited an unexpected level of inhibition in the silanediol (IC₅₀ = 72 nM), suggesting an alternative mode of binding to the enzyme.

Journal of Organic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Safety of Difluorodiphenylsilane.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Borys, Andryj M. published the artcileThe Anionic Pathway in the Nickel-Catalysed Cross-Coupling of Aryl Ethers, Recommanded Product: 4,4′-Dimethyldiphenyl, the publication is Angewandte Chemie, International Edition (2021), 60(46), 24659-24667, database is CAplus and MEDLINE.

The Ni-catalyzed cross-coupling of aryl ethers is a powerful method to forge new C-C and C-heteroatom bonds. However, the inert C(sp²)-O bond means that a canonical mechanism that relies on the oxidative addition of the aryl ether to a Ni⁰ center is thermodynamically and kinetically unfavorable, which suggests that alternative mechanisms may be involved. Here, we provide spectroscopic and structural insights into the anionic pathway, which relies on the formation of electron-rich hetero-bimetallic nickelates by adding organometallic nucleophiles to a Ni⁰ center. Assessing the rich co-complexation chem. between Ni(COD)₂ and PhLi has led to the structures and solution-state chem. of a diverse family of catalytically competent lithium nickelates being unveiled. In addition, we demonstrate dramatic solvent and donor effects, which suggest that the cooperative activation of the aryl ether substrate by Ni⁰-ate complexes plays a key role in the catalytic cycle.

Angewandte Chemie, International Edition published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Recommanded Product: 4,4′-Dimethyldiphenyl.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Coelho, Paula P. published the artcileEndosomal LC3C-pathway selectively targets plasma membrane cargo for autophagic degradation, Product Details of C5H11NO2S, the publication is Nature Communications (2022), 13(1), 3812, database is CAplus and MEDLINE.

Autophagy selectively targets cargo for degradation, yet mechanistic understanding remains incomplete. The ATG8-family plays key roles in autophagic cargo recruitment. Here by mapping the proximal interactome of ATG8-paralogs, LC3B and LC3C, we uncover a LC3C-Endocytic-Associated-Pathway (LEAP) that selectively recruits plasma-membrane (PM) cargo to autophagosomes. We show that LC3C localizes to peripheral endosomes and engages proteins that traffic between PM, endosomes and autophagosomes, including the SNARE-VAMP3 and ATG9, a transmembrane protein essential for autophagy. We establish that endocytic LC3C binds cargo internalized from the PM, including the Met receptor tyrosine kinase and transferrin receptor, and is necessary for their recruitment into ATG9 vesicles targeted to sites of autophagosome initiation. Structure-function anal. identified that LC3C-endocytic localization and engagement with PM-cargo requires the extended carboxy-tail unique to LC3C, the TBK1 kinase, and TBK1-phosphosites on LC3C. These findings identify LEAP as an unexpected LC3C-dependent pathway, providing new understanding of selective coupling of PM signalling with autophagic degradation

Nature Communications published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Product Details of C5H11NO2S.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Berger, Michael published the artcileMetal-free electrochemical fluorodecarboxylation of aryloxyacetic acids to fluoromethyl aryl ethers, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Chemical Science (2020), 11(23), 6053-6057, database is CAplus and MEDLINE.

Electrochem. decarboxylation of aryloxyacetic acids followed by fluorination provided easy access to fluoromethyl aryl ethers. This electrochem. fluorodecarboxylation offers a sustainable approach with elec. current as traceless oxidant. Using Et₃N¡¤5HF as fluoride source and as supporting electrolyte, this simple electrosynthesis afforded various fluoromethoxyarenes in yields up to 85%.

Chemical Science published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Berger, Michael published the artcileMetal-free electrochemical fluorodecarboxylation of aryloxyacetic acids to fluoromethyl aryl ethers, Synthetic Route of 163839-73-4, the publication is Chemical Science (2020), 11(23), 6053-6057, database is CAplus and MEDLINE.

Electrochem. decarboxylation of aryloxyacetic acids followed by fluorination provided easy access to fluoromethyl aryl ethers. This electrochem. fluorodecarboxylation offers a sustainable approach with elec. current as traceless oxidant. Using Et₃N¡¤5HF as fluoride source and as supporting electrolyte, this simple electrosynthesis afforded various fluoromethoxyarenes in yields up to 85%.

Chemical Science published new progress about 163839-73-4. 163839-73-4 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Carboxylic acid,Benzene,Ether, name is 2-(4-(Trifluoromethyl)phenoxy)acetic acid, and the molecular formula is C9H7F3O3, Synthetic Route of 163839-73-4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhuang, Zhe published the artcileRapid Construction of Tetralin, Chromane, and Indane Motifs via Cyclative C-H/C-H Coupling: Four-Step Total Synthesis of (¡À)-Russujaponol F, Name: 2-Methyl-4-phenylbutanoic acid, the publication is Journal of the American Chemical Society (2021), 143(2), 687-692, database is CAplus and MEDLINE.

The development of practical C-H/C-H coupling reactions remains a challenging yet appealing synthetic venture because it circumvents the need to prefunctionalize both coupling partners for the generation of C-C bonds. Herein we report a cyclative C(sp³)-H/C(sp²)-H coupling reaction of free aliphatic acids enabled by a cyclopentane-based mono-N-protected ¦Â-amino acid ligand. This reaction uses inexpensive sodium percarbonate (Na₂CO₃¡¤1.5H₂O₂) as the sole oxidant and generates water as the only byproduct. A range of biol. important scaffolds, including tetralins, chromans, and indanes, can be easily prepared by this protocol. Finally, the synthetic application of this methodol. is demonstrated by the concise total synthesis of (¡À)-russujaponol F in a four-step sequence starting from readily available phenylacetic acid and pivalic acid through sequential functionalizations of four C-H bonds.

Journal of the American Chemical Society published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C7H8BFO2, Name: 2-Methyl-4-phenylbutanoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia