Tag: M.W=200-250

Popielarz, Roman published the artcileEffect of coinitiator type on initiation efficiency of two-component photoinitiator systems based on eosin, COA of Formula: C14H23N, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2008), 46(11), 3519-3532, database is CAplus.

The effect of coinitiator structure on the relative initiation efficiency of two-component eosin/coinitiator systems was evaluated quant. in the polymerization of polyethylene glycol diacrylate as an example monomer. The initiation efficiency was measured by the fluorescence probe technique (FPT), using eosin both as a photoinitiator component and as a fluorescent probe. A LED/fiber optic-based measurement system was developed and used in this study. From among 17 compounds tested, the following coinitiators form most efficient photoinitiating systems in combination with eosin, when exposed to visible light: coinitiator, relative efficiency = triethanolamine, 1.0; 2,6-diisopropyl-N,N-dimethylaniline, 0.70; 2-benzyl-2-(dimethylamino)-4′-morpholinobutyrophenone (Irgacure 369), 0.91; carbon tetrabromide, 2.1; [4-[(2-hydroxytetradecyl)oxy]phenyl]phenyliodonium hexafluoroantimonate (SarCat 1012), 28. These relative efficiencies refer to the following component concentrations: [eosin] = 8.6 ¡Á 10^-4 M, (0.05% by weight); [coinitiator] = 4.3 ¡Á 10^-2 M. The factors affecting the initiation efficiency of the systems studied are discussed.

Journal of Polymer Science, Part A: Polymer Chemistry 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 C14H23N, COA of Formula: C14H23N.

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

Talavera, Maria published the artcileC-H and C-F Bond Activation Reactions of Fluorinated Propenes at Rhodium: Distinctive Reactivity of the Refrigerant HFO-1234yf, Recommanded Product: Difluorodiphenylsilane, the publication is Angewandte Chemie, International Edition (2019), 58(31), 10688-10692, database is CAplus and MEDLINE.

The reaction of [Rh(H)(PEt₃)₃] (1) with the refrigerant HFO-1234yf (2,3,3,3-tetrafluoropropene) affords an efficient route to obtain [Rh(F)(PEt₃)₃] (3) by C-F bond activation. Catalytic hydrodefluorinations were achieved in the presence of the silane HSiPh₃. In the presence of a fluorosilane, 3 provides a C-H bond activation followed by a 1,2-fluorine shift to produce [Rh{(E)-C(CF₃):CHF}(PEt₃)₃] (4). Similar rearrangements of HFO-1234yf were observed at [Rh(E)(PEt₃)₃] [E = Bpin (6), C₇D₇ (8), Me (9)]. The ability to favor C-H bond activation using 3 and fluorosilane is also demonstrated with 3,3,3-trifluoropropene. Studies are supported by DFT calculations

Angewandte Chemie, International Edition 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 C4H8Cl2S2, Recommanded Product: Difluorodiphenylsilane.

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

Jiricek, I. published the artcileEcologically acceptable N-based compounds in corrosion inhibition in acidic media, Formula: C14H31NO2, the publication is Annali dell’Universita di Ferrara, Sezione 5: Chimica Pura ed Applicata, Supplemento (1995), 235-44, database is CAplus.

Selected amides of fatty acids with 16-18 carbon atoms in mol. and mol. weight of 300-400 were investigated to find a perspective ecol. supplement to corrosion inhibitors used nowadays in acidic environments. Weight-loss, potentiodynamic polarization, impedance spectroscopy and hydrogen penetration were among the methods used in the study. Results show that good protection can be expected from all organic compounds investigated. Inhibition efficiency of 90-97% at room temperature can be expected. Effectiveness is decreased with increasing temperature Addition of inhibitor into solution also affects hydrogen transport through the carbon steel sheet material.

Annali dell’Universita di Ferrara, Sezione 5: Chimica Pura ed Applicata, Supplemento published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Formula: C14H31NO2.

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

Toyota, Masahiro published the artcileSimple design for the construction of complex gibberellin framework – stereoselective synthesis of a possible key intermediate to GA₁₂ via Pd²⁺-promoted cycloalkenylation reaction, Related Products of catalysis-chemistry, the publication is Tetrahedron (1995), 51(25), 6927-40, database is CAplus.

A successful design for the construction of C₂₀ gibberellin framework has been described. The key features of the synthesis are a Pd²⁺-promoted cycloalkenylation reaction and an intramol. Diels-Alder reaction, giving the intermediate I.

Tetrahedron published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C14H17FN4O3, Related Products of catalysis-chemistry.

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

de Kruijff, Goswinus H. M. published the artcileElectrochemical Synthesis of Aryl Methoxymethyl Ethers, Application In Synthesis of 1798-04-5, the publication is ChemElectroChem (2019), 6(16), 4180-4183, database is CAplus.

Methoxymethyl protected phenols/thiophenols ArXCH₂OCH₃ [X = O, S; Ar = Ph, 4-ClC₆H₄, 2,6-di-ClC₆H₃, etc.] were synthesized by safe, reagent- and reagent waste-free anodic decarboxylation protocol. High current efficiencies and good functional group tolerance made this methodol. a useful tool for the preparation of these valuable and protected phenol building blocks.

ChemElectroChem 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, Application In Synthesis of 1798-04-5.

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

Morris, David T. J. published the artcileA molecular communication channel consisting of a single reversible chain of hydrogen bonds in a conformationally flexible oligomer, Category: catalysis-chemistry, the publication is Chem (2021), 7(9), 2460-2472, database is CAplus and MEDLINE.

Communication of information through the global switching of conformation in synthetic mols. has hitherto entailed the inversion of chirality. Here, we report a class of oligomer through which information may be communicated through a global reversal of polarity. Ethylene-bridged oligoureas are constitutionally sym., conformationally flexible mols. organized by a single chain of hydrogen bonds running the full length of the oligomer. NMR reveals that this hydrogen-bonded chain may undergo a coherent reversal of directionality. The directional uniformity of the hydrogen-bond chain allows it to act as a channel for the spatial communication of information on a mol. scale. A binding site at the terminus of an oligomer detects local information about changes in pH or anion concentration and transmits that information-in the form of a directionality switch in the hydrogen-bond chain-to a remote polarity-sensitive fluorophore. This propagation of polarity-encoded information provides a new mechanism for mol. communication.

Chem 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, Category: catalysis-chemistry.

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

Gibbs, Kathleen published the artcileThe effect of certain chelating compounds on the urinary excretion of copper by the rat: observations on their clinical significance, HPLC of Formula: 38260-01-4, the publication is Clinical Science and Molecular Medicine (1977), 53(4), 317-20, database is CAplus and MEDLINE.

Basal urine Cu excretion by rats was increased from 65.1 to 367.1 or 305.9 nmol/24 h by penicillamine [52-67-5] or triethylene tetramine-2HCl [38260-01-4] (100 mg orally), resp. Certain chelating agents depressed Cu excretion, e.g. 1,2,4-triazole [288-88-0] reduced excretion to 20.6 nmol/24 h, probably by forming insoluble chelates, rendering Cu unavailable for excretion at the glomerulus. The use of this screening procedure to assess rapidly the potential of chelating agents for the treatment of Wilson’s disease is discussed.

Clinical Science and Molecular Medicine 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, HPLC of Formula: 38260-01-4.

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

Das, Saibal Kumar published the artcileNovel route of synthesis of some trientine impurities and their characterization, SDS of cas: 38260-01-4, the publication is Pharma Chemica (2021), 13(4), 23-31, database is CAplus.

Trientine has been tested for inhibition of the spontaneous development of hepatitis and hepatic tumors in rats. It has been described in the use of copper binding compounds in the treatment of various disorders, including treatment of diabetes mellitus and complications thereof, including diabetic cardiomyopathy. The first synthesis of Impurities A, B, C, D, E, G and H along with Impurity F via innovative approach starting from cheap raw materials is reported.

Pharma Chemica 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, SDS of cas: 38260-01-4.

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

Thirupugalmani, K. published the artcileInfluence of polar solvents on growth of potentially NLO active organic single crystals of N-benzyl-2-methyl-4-nitroaniline and their efficiency in terahertz generation, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline, the publication is CrystEngComm (2017), 19(19), 2623-2631, database is CAplus.

We report on the growth of N-benzyl-2-methyl-4-nitroaniline (BNA) crystals by a solution growth method using certain polar protic and aprotic solvents (single or mixed). It was observed that the morphol. of the BNA crystals could be influenced by the solvents used and that the growth was, with certain exceptions, predominant along the crystallog. b axis. Attempts to grow large BNA crystals from these solvents showed that the majority of these polar solvent mols. tended to get adsorbed preferentially along the polar +c and/or -c axes/axis. The bulk and surface qualities of the grown crystals were observed to be influenced by the solvents employed to grow the BNA crystals and the results of THz measurements obtained for the crystals grown from selected solvents were also found to corroborate these observations. A systematic approach has shown that the BNA crystals grown from one of the polar aprotic solvents, which is presumably reported for the first time for this crystal, exhibited a relatively higher THz efficiency. It is further understood that this particular solvent created a favorable solute-solvent environment at the progressing crystal-solution interface which improved the overall quality of the BNA single crystals and resulted in the significant enhancement in the THz efficiencies.

CrystEngComm published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C12H10F2Si, Recommanded Product: N-Benzyl-2-methyl-4-nitroaniline.

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

Giumanini, Angelo G. published the artcileRevisitation of the formaldehyde-aniline condensation. VIII. Monomeric N-methyleneanilines, COA of Formula: C14H23N, the publication is Journal fuer Praktische Chemie (Leipzig) (1988), 330(2), 161-74, database is CAplus.

A convenient, high yield method for the preparation of monomeric N-methyleneanilines I (R = Me, Et, CHMe₂; R¹ = H, 4-Br, 3-O₂N) and the characterization of the products by mass spectrometry, ¹H- and ¹³C-NMR, and IR are reported, improving previous procedures and describing new compounds The existence of monomeric N-methyleneanilines is strictly related to the presence of enough steric hindrance to prevent oligomerization by substituents in ortho positions. Some imines are tentatively identified on the basis of the observed mass spectrum of the reaction mixture I (R = Me, R¹ = H) provided an example of a mobile equilibrium between a monomeric and trimeric imine.

Journal fuer Praktische Chemie (Leipzig) 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 C14H23N, COA of Formula: C14H23N.

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