Month: December 2022

Zarudnitskii, E. V. published the artcileC-phosphorylation of 2-dialkylaminothiazole and imidazo[2,1-b]thiazole derivatives, Recommanded Product: 1,1-Dimethylthiourea, the publication is Ukrainskii Khimicheskii Zhurnal (Russian Edition) (2002), 68(11-12), 38-42, database is CAplus.

Phosphorylation of 2-dialkylaminothiazole derivatives with PCl₃, Ph₂PCl and Ph₂PBr was studied. Reaction of 2-diethylaminothiazole with R₂PCl gave 2-Et₂N-5-PR₂(C₃HNS) (2 R = Cl, 3 R = Ph). Phosphination of Et 2-diethylaminothiazolecarboxylate (4) with Ph₂PBr gave 5-PPh₂ derivative (5), which was hydrolyzed to free acid (6). Thiazoleacetates 2-R₂N(C₃HNS)-4-CH₂COOEt were also phosphinated in position 5 to give 2-R₂N(C₃NS)-4-CH₂COOEt-5-PPh₂ (8a–c, R = Me, Et, or R₂N = morpholino), which were hydrolyzed to free acids (9a–c). In contrast to esters of 2-dialkylamino-4-thiazoleacetic acids, Et ester of 6-imidazo[2,1-b]thiazoleacetic acid undergoes C-phosphination with Ph₂PCl both at heterocycle and at methylene group.

Ukrainskii Khimicheskii Zhurnal (Russian Edition) 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 C7H11N, Recommanded Product: 1,1-Dimethylthiourea.

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

Svelto, M. published the artcileNoradrenaline induced secretion of nonelectrolytes through frog skin, Product Details of C3H8N2S, the publication is Journal of Membrane Biology (1977), 36(1), 1-11, database is CAplus and MEDLINE.

Addition of noradrenaline (I) [51-41-2] (4 ¡Á 10-5M) to the inner bathing fluid in the skin of the frog Rana esculenta resulted in increased unidirectional fluxes of urea [57-13-6], thiourea [62-56-6], N-methylthiourea [598-52-7], N,N-dimethylthiourea [6972-05-0], and mannitol [69-65-8]. Fluxes towards the external medium (?0) showed much greater increases than those moving in the opposite direction (?i). The effect of I on ?0 was higher for urea and thiourea than mannitol, whereas its effect on ?0 thiourea derivatives was related to lipid solubility This phenomenon did not occur for ?i of the same mols. P-trifluoromethoxycarboxycyandidephenylhydrazone (10-6M) pretreatment strongly inhibited the I effect on ?0. In skin pretreated with colchicine (2 ¡Á 10-5M), both urea fluxes were increased to the same extent by I. I apparently exerts 2 sep. effects: a change in permeability in both directions; a secretion of nonelectrolytes towards the external fluid.

Journal of Membrane Biology 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 C14H10N2O, Product Details of C3H8N2S.

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

Jacquemin, Denis published the artcileTD-DFT performance for the visible absorption spectra of organic dyes: Conventional versus long-range hybrids, Synthetic Route of 1821-27-8, the publication is Journal of Chemical Theory and Computation (2008), 4(1), 123-135, database is CAplus and MEDLINE.

The ¦Ð ¡ú ¦Ð* transitions of more than 100 organic dyes from the major classes of chromophores (quinones, diazo, …) have been investigated using a time-dependent d. functional theory procedure relying on large at. basis sets and the systematic modeling of solvent effects. These calculations have been performed with pure (PBE) as well as conventional (PBE0) and long-range (LR) corrected hybrid functionals (LC-PBE, LC-¦ØPBE, and CAM-B3LYP). The computed wavelengths are systematically guided by the percentage of exact exchange included at intermediate interelectronic distance, i.e., the ¦Ë_max value always follows the PBE > PBE0 > CAM-B3LYP > LC-PBE > LC-¦ØPBE > HF sequence. The functional giving the best estimates of the exptl. transition energies may vary, but PBE0 and CAM-B3LYP tend to outperform all other approaches. The latter functional is shown to be especially adequate to treat mols. with delocalized excited states. The mean absolute error provided by PBE0 is 22 nm (0.14 eV) with no deviation exceeding 100 nm (0.50 eV): PBE0 is able to deliver reasonable estimates of the color of most organic dyes of practical or industrial interest. By using a calibration curve, we found that the LR functionals systematically allow an even more consistent description of the low-lying excited-state energies than the conventional hybrids. Indeed, linearly corrected LR approaches yield an average error of 10 nm for each dye family. Therefore, when such statistical treatments can be designed for given sets of dyes, a simple and rapid theor. procedure allows both a chem. sound and a numerically accurate description of the absorption wavelengths.

Journal of Chemical Theory and Computation 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, Synthetic Route of 1821-27-8.

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

Montes-Zavala, I. published the artcileThermal and mechanical properties of poly(lactic acid) filled with modified silicon dioxide: importance of the surface area, Application of 3-(Trimethoxysilyl)propan-1-amine, the publication is Polymer Bulletin (Heidelberg, Germany) (2022), 79(3), 1409-1435, database is CAplus.

In this research work, the effect of the change in the surface area of silicon dioxide nanoparticles of the same size on mech. properties of poly(lactic acid) nanocomposites (PLA) was studied, as well as the role of coupling agent amount in the compatibility of these nanomaterials. We consider a spherical silicon dioxide with a surface area of 170-200 m²/g (labeled as S-SiO2) and another considered amorphous with a surface area of 180-600 m²/g (labeled as P-SiO₂). According to obtained results, for nanomaterials with high surface area, it was observed while increasing coupling agent amount, the elasticity of the composite was observed to increase. In contrast, in nanomaterials with spherical nanoparticles, it was observed that as the amount of coupling agent decreases, the resistance of the material increases, reaching a maximum when a 10:2 ratio is used. Furthermore, it is observed that the incorporation of nanoparticles with high surface areas area does not modify the crystallization rate significantly. Besides, in both cases, it was observed that the highest crystallization rate is reached when a 10:2 ratio is used. Finally, a maximum in the 10:2 ratio was observed for the compatibility in both particles, which was manifested in an increase in the storage module through a dynamic mech. anal. The rate of crystal formation as well as the number of formed crystals have a considerable effect on mech. properties of nanocomposites when the surface area is modified.

Polymer Bulletin (Heidelberg, Germany) 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, Application of 3-(Trimethoxysilyl)propan-1-amine.

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

Hornillos, Valentin published the artcileCu-Catalyzed Asymmetric Allylic Alkylation of Phosphonates and Phosphine Oxides with Grignard Reagents, Computed Properties of 4141-48-4, the publication is Chemistry – A European Journal (2013), 19(17), 5432-5441, database is CAplus and MEDLINE.

An efficient and highly enantioselective Cu-catalyzed allylic alkylation of phosphonates and phosphine oxides with Grignard reagents and Taniaphos or phosphoramidites as chiral ligands is reported. Transformation of these products leads to a variety of new P-containing chiral intermediates.

Chemistry – A European Journal 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 C15H15OP, Computed Properties of 4141-48-4.

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

Benevolenskaya, G. V. published the artcileCatalytic activity of azaadamantanes in the Claus reaction in the further purification of exhaust gases of a sulfur production apparatus, Category: catalysis-chemistry, the publication is Podgotovka i Pererabotka Gaza i Gazovogo Kondensata (1978), 13-17, database is CAplus.

The catalytic activity was studied of azaadamantanes in the manufacture of elementary S from SO₂-containing waste gases by the Claus process at 125-30¡ã. The highest conversion rates were attained with 7-amino-1,3,5-triazaadamantane (I), I benzoate, and I stearate in a polyethylene glycol PEG-400 medium. The conversion was practically complete when the catalyst concentration was ¡Ý1%. Little of the catalyst was consumed since they were inert to SO₂ and suitable at any H₂S/SO₂ ratio.

Podgotovka i Pererabotka Gaza i Gazovogo Kondensata published new progress about 14707-75-6. 14707-75-6 belongs to catalysis-chemistry, auxiliary class Triazinanes, name is 1,3,5-Triazaadamantan-7-amine, and the molecular formula is C7H14N4, Category: catalysis-chemistry.

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

Benevolenskaya, G. V. published the artcileCatalytic effect of azaadamantanes on the Claus reaction in additional cleaning of waste gases from sulfur production units, Recommanded Product: 1,3,5-Triazaadamantan-7-amine, the publication is Nauchno-Tekhnicheskii Obzor, Seriya: Podgotovka i Pererabotka Gaza i Gazovogo Kondensata (1978), 13-17, database is CAplus.

In order to apply azaadamantane derivatives in an adsorption-catalytic process for addnl. cleaning of waste gases from S production plants, their catalytic properties were investigated. In a reactor formed by a porous filter of diameter 18 mm containing 10³ cm of catalyst solution, a gas mixture consisting of 3% of H₂S and SO₂ in N was introduced with volume rate 31/h at 130¡ã. As an index of catalytic activity, the degree of H₂S transformation was used. The dependence of this index on the flow rate and time were measured. The high catalytic activity of 7-amino-1,3,5-triazaadamantane [14707-75-6] with low volume rate, due to its excellent phys. properties and no interaction with SO₂, makes it possible to use this substance as a material in the process of addnl. cleaning of waste gases from S production plants.

Nauchno-Tekhnicheskii Obzor, Seriya: Podgotovka i Pererabotka Gaza i Gazovogo Kondensata published new progress about 14707-75-6. 14707-75-6 belongs to catalysis-chemistry, auxiliary class Triazinanes, name is 1,3,5-Triazaadamantan-7-amine, and the molecular formula is C7H14N4, Recommanded Product: 1,3,5-Triazaadamantan-7-amine.

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

Zong, Zhi-Min published the artcileConvenient synthesis of N-methylpyrrolidine-2-thione and some thioamides, Application of 1,1-Dimethylthiourea, the publication is Korean Journal of Chemical Engineering (2003), 20(2), 235-238, database is CAplus.

We examined thermal reactions of CS₂ with N-methyl-2-pyrrolidinone, formamide, acetamide, and DMF. Under optimum conditions N-methylpyrrolidine-2-thione and the corresponding thioamides can be obtained in good to excellent yields.

Korean Journal of Chemical Engineering 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 C37H30ClIrOP2, Application of 1,1-Dimethylthiourea.

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

Wang, Zhi-Yong published the artcileLigand-Free Iron-Catalyzed Homo-Coupling of Aryllithium Reagents, Safety of 4,4′-Dimethyldiphenyl, the publication is Asian Journal of Organic Chemistry (2020), 9(11), 1834-1840, database is CAplus.

The synthesis of sym. biaryls via the iron-catalyzed homo-coupling of aryllithium reagents was developed under a mild condition, in the absence of ligand, with wide range of scope, and in good yields. Investigation on reaction concentration and practical utility of this environmentally friendly procedure also indicates a promising application outlook.

Asian Journal of Organic Chemistry 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 C13H11NO, Safety of 4,4′-Dimethyldiphenyl.

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

Sun, Yushan published the artcileChemistry of ocean resources. IX. A new type of organic enrichment agent for extraction of potassium from seawater, Synthetic Route of 5411-14-3, the publication is Haiyang Xuebao (Zhongwenban) (1987), 9(3), 330-4, database is CAplus.

The enrichment of K⁺ ion from seawater and low-concentration solutions was studied by using O,O‘-catecholdiacetic acid (CDAH₂) as complex donor. The K⁺ ion enrichment efficiency was ¡Ý90%. Solid CDAHK.CDAH₂ was formed in the precipitation conversion.

Haiyang Xuebao (Zhongwenban) 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 C22H32O2, Synthetic Route of 5411-14-3.

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