Catalysis-chemistry

Strandwitz, Nicholas C. published the artcileOne- and Two-Photon Induced Polymerization of Methylmethacrylate Using Colloidal CdS Semiconductor Quantum Dots, Recommanded Product: 2,6-Diisopropyl-N,N-dimethylaniline, the publication is Journal of the American Chemical Society (2008), 130(26), 8280-8288, database is CAplus and MEDLINE.

The development of one- and two-photon induced polymerization using CdS semiconductor quantum dots (QDs) and amine co-initiators to promote radical generation and subsequent polymerization is presented. Two-photon absorption (TPA) cross-section measurements, linear absorption, and transmission electron microscopy are used to characterize the QDs. The effectiveness of the co-initiators in increasing the efficiency of photopolymerization (polymer chains formed per excitation) is examined Triethylamine was observed to be most effective, yielding quantum efficiencies of initiation of >5%. The interactions between the co-initiators and QDs are investigated with steady-state photoluminescence and IR spectroscopies. Possible initiation mechanisms are discussed and supported by electrochem. data. Making use of the surface chem. developed here and the large QD TPA cross-sections, two-photon induced polymerization is demonstrated. The large TPA cross-sections coupled with modest quantum efficiencies for initiation reveal the unique potential of molecularly passivated QDs as efficient two-photon photosensitizers for polymerization

Journal of the American Chemical Society published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C21H24O8, Recommanded Product: 2,6-Diisopropyl-N,N-dimethylaniline.

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

Sharghi, H. published the artcileSynthesis of new lariat ethers containing polycyclic phenols and heterocyclic aromatic compound on graphite surface via Mannich reaction, Product Details of C10H10O6, the publication is Journal of the Iranian Chemical Society (2010), 7(1), 275-288, database is CAplus.

Syntheses of novel lariat ethers containing polycyclic phenols and heterocyclic aromatic compounds using graphite via Mannich reaction were described. For this purpose N-methoxymethyl azacrown ether I was synthesized in nearly quant. yield. The reaction of I with polycyclic phenols and heterocyclic aromatic compounds was performed in 10-20 min in the presence of graphite. The graphite powder can be reused up to five times after simple washing with acetone.

Journal of the Iranian Chemical Society published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C27H29N5, Product Details of C10H10O6.

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

Gill, Dip Singh published the artcileA conductometric study of the complex formation between copper(I) perchlorate and some organic ligands in acetonitrile, Related Products of catalysis-chemistry, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (1998), 37A(12), 1079-1083, database is CAplus.

CuClO₄ solutions of different concentrations in MeCN were conductometerically titrated with solutions of thiourea (TU), N,N-dimethylthiourea (DMTU), N-phenylthiourea (NPTU), N,N-diphenylthiourea (DPTU), 1,10-phenanthroline (PHEN), 2,2′-bipyridine (BPY) and tri-Et phosphite (TEP) at 298 K. The plots of conductivity vs. moles of ligand added show significant decrease in conductivity followed by a region of almost constant conductivity The fall of conductivity in the cases of thiourea and substituted thioureas is linear while in all the other cases it is nonlinear. From these plots knowledge about the stoichiometry of the complexes formed between CuClO₄ and various ligands was derived. A 1:2 complex is observed between CuClO₄ and 1,10-phenanthroline and 2,2′-bipyridine and 1:4 complex with tri-Et phosphite. CuClO₄ forms complexes with thiourea and substituted thioureas, the stoichiometry of which strongly depends upon the concentrations of CuClO₄ and of the ligands used for the titration With N-phenylthiourea and N,N-diphenylthiourea, the complex formed has CuClO₄ to ligand ratio as 1:2 under the present conditions employed, while with thiourea and N,N-dimethylthiourea, the stoichiometry of the complexes formed between CuClO₄ and ligands is either 1:2 or 1:3 or 1:4 depending upon the conditions.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Related Products of catalysis-chemistry.

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

Gazizov, Mukattis B. published the artcileO, o-Dialkyl-S-(1,1-dimethyl-2-oxoethyl)dithiophosphates: Synthesis and Reactions with N-Nucleophiles, Safety of N1,N2-Dibenzylethane-1,2-diamine, the publication is Heteroatom Chemistry (2015), 26(6), 436-440, database is CAplus.

Hydrolysis of the new types of iminium salts was used to synthesize O,O-dialkyl-S-(1,1-dimethyl-2-oxoethyl)dithiophosphates or 2-dialkoxythiophosphorylthio-substituted aldehydes with C isochain. Reactions of aldehydes with N-, N,N-, and O,N-nucleophiles gave new phosphorylated imines containing an acetal group at different positions, perhydro-1,3-diazol and oxazol with the diisopropoxythiophosphorylthio group in a side chain, and hydrazone of this aldehyde and diphenylphosphinylacetic acid hydrazide.

Heteroatom Chemistry published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Safety of N1,N2-Dibenzylethane-1,2-diamine.

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

Nikpassand, Mohammad published the artcileMechanochemical synthesis of azo-linked 2-amino-4H-chromene derivatives using Fe₃O₄@SiO₂@KIT-6-NH₂@Schiff-base complex nanoparticles, Category: catalysis-chemistry, the publication is Journal of Molecular Structure (2022), 132065, database is CAplus.

An efficient, solvent-free, and environmentally benign route via mechanochem. means is described for the synthesis of azo-linked 2-amino-4H-chromene derivatives The four-component reaction of azo-linked salicylaldehydes, malononitrile, Et acetoacetate, and hydrazine hydrochloride has exploited recyclable magnetic nano-catalyst, Fe₃O₄@SiO₂@KIT-6-NH₂@Schiff-base complex. The morphol. and structure of Fe₃O₄@SiO₂@KIT-6-NH₂@Schiff-base complex nanoparticle was evaluated using field emission SEM (FE-SEM), TEM, TGA, Fourier transform- IR spectroscopy (FTIR), XRD, energy dispersive X-ray spectroscopy (EDS), Zeta potential and a vibrating sample magnetometer (VSM). The structures of the synthesized 5-amino-pyrazole-4-carbonitrile compounds were confirmed by FTIR, ¹H NMR, ¹³C NMR spectrometry and elemental analyses.

Journal of Molecular Structure published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, Category: catalysis-chemistry.

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

Nazari, Behzad published the artcileReliable prediction of the condensed (solid or liquid) phase enthalpy of formation of organic energetic materials at 298 K through their molecular structures, Application of Bis(4-nitrophenyl)amine, the publication is Fluid Phase Equilibria (2016), 248-258, database is CAplus.

A reliable new method is introduced to predict the condensed (solid or liquid) phase enthalpy of formation of organic energetic materials (at 298 K). This model is based on some additive and non-additive functions, which are based on elemental composition and some mol. fragments. The novel correlation is constructed on the basis of exptl. data of 222 organic compounds containing different types of energetic bonds such as -O-O-, -N₃, -ON=O, -NO₂, -ONO₂ and -NNO₂. For 144 compounds of this set, where the best available group additivity method can be used, the root mean square (rms) deviations of the new and group additivity methods from exptl. data are 31.0 and 68.2 kJ/mol, resp. For further 77 energetic compounds, where the computed results of quantum mech. methods for simple organic energetic compounds were available and the best available group additivity method for some complex mols. can be applied, the rms deviations of the new, quantum mech. (54 compounds) and group additivity (51 compounds) methods from the measured data are 35.9, 42.1 and 170.6 kJ/mol, resp.

Fluid Phase Equilibria 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, Application of Bis(4-nitrophenyl)amine.

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

Fu, Yuan-Te published the artcileBRACO19 analog dimers with improved inhibition of telomerase and hPot 1, Application In Synthesis of 38260-01-4, the publication is Bioorganic & Medicinal Chemistry (2009), 17(5), 2030-2037, database is CAplus and MEDLINE.

Human chromosomes terminate with telomeres, which contain double-stranded G-rich, repetitive DNA followed by a single-stranded overhang of the G-rich sequence. Single-stranded oligonucleotides containing G-rich telomeric repeats have been observed in vitro to fold into a variety of G-quadruplex topologies depending on the solution conditions. G-quadruplex structures are notable in part because G-quadruplex ligands inhibit both the enzyme telomerase and other telomere-binding proteins. Because telomerase is required for growth by the majority of cancers, G-quadruplex-stabilizing ligands have become an attractive platform for anticancer drug discovery. Here, we present the preparation and biochem. activities of a novel series of 3,6-disubstituted acridine dimers modeled after the known G-quadruplex ligand BRACO19. These BRACO19 Analog Dimer (BAD) ligands were shown to bind to human telomeric DNA and promote the formation of intramol. G-quadruplexes in the absence of monovalent cations. As expected, the BAD ligands bound to telomeric DNA with a 1:1 stoichiometry, whereas the parent compound BRACO19, a monomer, bound with a 2:1 stoichiometry. The BAD ligands exhibited potent inhibition of human telomerase with IC₅₀ values similar to or lower than those of BRACO19. Furthermore, the BAD ligands displayed greater potency in the inhibition of hPot1 and increased selectivity for G-quadruplex DNA when compared to BRACO19. Collectively, these experiments support the hypothesis that there is an increased potency and selectivity to be gained in the design of G-quadruplex-stabilizing agents that incorporate multiple interactions.

Bioorganic & Medicinal Chemistry published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Application In Synthesis of 38260-01-4.

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

Abraham, D. J. published the artcileDesign, synthesis, and testing of potential antisickling agents. 4. Structure-activity relationships of benzyloxy and phenoxy acids, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Journal of Medicinal Chemistry (1984), 27(8), 967-78, database is CAplus and MEDLINE.

The title compounds I (R¹ = O, S, CH₂O, CH₂S, or CH₂OCH₂; R² = H, Br, Cl, F, Me, or MeO; R³ = H, Cl, F, Me, or MeO; R⁴ = H, Br, Cl, Me, NH₂, etc.; R⁵ = H, Cl, F, Me, or MeO; R⁶ = H, Br, Cl, F, or Me; R⁷ and R⁸ = H or Me) and miscellaneous compounds were prepared and evaluated in vitro for antigelling activity. 2-[(p-Bromophenoxy)ethyl]malonic?acid (II) [90296-21-2] was the most active compound A hypothesis about a mechanism to explain their effects on the O equilibrium properties of Hb is given. Structure-activity relations are discussed.

Journal of Medicinal Chemistry 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, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Sifri, Renee J. published the artcilePhotocontrolled cationic degenerate chain transfer polymerizations via thioacetal initiators, Category: catalysis-chemistry, the publication is Polymer Chemistry (2020), 11(40), 6499-6504, database is CAplus.

Recent developments in photocontrolled polymerizations have facilitated the development of previously inaccessible materials. While photocontrolled radical polymerizations have been extensively studied, related processes involving cationic polymerizations are underexplored and limited to RAFT processes. In this study, we disclose a visible light, temporally controlled cationic polymerization of vinyl ethers utilizing thioacetals and a photoredox catalyst. We demonstrate a broad scope of thioacetal initiators that achieve a well-controlled polymerization by recapping propagating chains via photocatalyst turnover in combination with a degenerate chain transfer process through sulfonium intermediates. Furthermore, we show that a photocatalyst with a more reducing ground state reduction potential allows for enhanced control and excellent temporal regulation of polymerization

Polymer Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C16H20N2, Category: catalysis-chemistry.

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

Patil, Nandkumar M. published the artcileNovel cuprous iodide-tributylphosphine catalyst system for amination of aryl chlorides, Product Details of C12H9N3O4, the publication is Chemical Communications (Cambridge, United Kingdom) (2003), 2460-2461, database is CAplus and MEDLINE.

A simple and efficient methodol. for the synthesis of triarylamines from aryl chlorides in a single step was demonstrated using a novel cuprous iodide-tributylphosphine catalyst system with high activity and selectivity (80-87% yield).

Chemical Communications (Cambridge, United Kingdom) 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, Product Details of C12H9N3O4.

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