Tag: M.W=200-250

Iwasaki, Takanori published the artcileNi-Catalyzed Dimerization and Hydroperfluoroarylation of 1,3-Dienes, HPLC of Formula: 1206-46-8, the publication is Journal of Organic Chemistry (2018), 83(16), 9267-9277, database is CAplus and MEDLINE.

A nickel-catalyzed three-component coupling reaction between perfluoroarenes and two mols. of a 1,3-diene in the presence of an alkyl Grignard reagent, which acted as a hydride source, provided 3-perfluoroarylated-1,7-octadienes via 1,3-diene dimerization and subsequent perfluoroarylation upon C-F bond cleavage. The reaction proceeded smoothly in a regioselective manner by simply combining NiCl₂ and PPh₃ as a catalyst and tolerated various functional groups on the perfluoroarenes. When substituted perfluoroarenes were employed, the reaction selectively occurred at the para-position. Mechanistic studies revealed that an anionic Ni complex, generated upon the reaction of Ni(0) with two mols. of a 1,3-diene and an alkyl Grignard reagent, played an important role in the C-C bond forming step with perfluoroarenes. The C-F bond cleavage was found to be a relatively fast step in the catalytic cycle.

Journal of Organic Chemistry published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, HPLC of Formula: 1206-46-8.

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

Miyamoto, Katsuhiko published the artcileCoherent tunable monochromatic Terahertz-wave generation using N-Benzyl-2-methyl-4-nitroaniline (BNA) crystal, SDS of cas: 201157-13-3, the publication is Proceedings of SPIE (2008), 68750C/1-68750C/8, database is CAplus.

Widely tunable terahertz (THz) -wave generation using difference frequency generation (DFG) in an organic N-Benzyl-2-methyl-4-nitroaniline (BNA) crystal was demonstrated. An organic nonlinear optical (NLO) BNA crystal is one of the promising materials for efficient and strong THz-wave generation because of its potential to have a sufficiently large enough second-order optical nonlinearity. Large and high quality single crystals of BNA (¦µ8¡Á30mm) were successfully grown by a vertical Bridgman method. The NLO coefficient d₃₃ of BNA crystal is about 230pm/V. It is the largest value reported for any yellow-colored NLO materials. BNA has low refractive index dispersion between the optical and THz-wave region, therefore the colinear phase matching condition of the Type0 configuration is satisfied by using 0.7?1¦Ìm band pump wavelength. So, we developed a near-IR dual-wavelength pump source for BNA-DFG. Two KTiOPO₄ (KTP) crystals were mounted on galvano scanners inside a double-pass optical parametric oscillator (OPO). It is pumped using a frequency-doubled Nd:YAG laser (532 nm, 8 ns, 100 Hz). The signal wave of the KTP-OPO output was controlled independently and rapidly using a galvano scanner. We successfully generated THz-wave using organic BNA crystal. The THz-wave generation range is from 0.1 to 15THz, while the pumping dual-wavelength is controlled in the 0.8-0.9¦Ìm range.

Proceedings of SPIE 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 C14H14N2O2, SDS of cas: 201157-13-3.

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

Rivera, Augusto published the artcileCleaner and efficient green chemistry synthesis of N,N’-dibenzyl or N,N’-(2-hydroxybenzyl)-ethane-1,2-diamine,-propane-1,3-diamine and -1,3-diamino-2-propanol, Formula: C16H20N2, the publication is International Journal of Chemistry (Toronto, ON, Canada) (2016), 8(4), 62-68, database is CAplus.

An efficient and highly eco-friendly protocol for the preparation of N,N’-dibenzyl or N,N’-(2-hydroxybenzyl)diamines I [R¹ = O, CH₂, CHOH; R² = H, 2-OH, 4-OCH₃, 4-N(CH₃)₂] via the reduction of the corresponding di-Schiff bases II that produces a good yield using water as a solvent without the need for catalysis or the azeotropic removal of water has been developed. These sym. diimines have been reduced to their corresponding diamines with sodium borohydride using a catalyst- and solvent-free protocol with excellent yield. Mild conditions, high yields, and a simple work-up procedure are the primary benefits of this protocol.

International Journal of Chemistry (Toronto, ON, Canada) 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, Formula: C16H20N2.

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

Hu, Yimu published the artcileSize-Selective Separation of Rare Earth Elements Using Functionalized Mesoporous Silica Materials, COA of Formula: C10H10O6, the publication is ACS Applied Materials & Interfaces (2019), 11(26), 23681-23691, database is CAplus and MEDLINE.

The separation and preconcentration of rare earth elements (REEs) from mineral concentrates in an economically and environmentally sustainable manner are difficult tasks due to their similar physicochem. properties. Herein, a series of tetradentate phenylenedioxy diamide (PDDA) ligands were synthesized and grafted on large-pore three-dimensional KIT-6 mesoporous silica. In solid-phase extraction, the hybrid sorbents enable a size-selective separation of REEs on the basis of the bite angles of the ligands. In particular, smaller REE³⁺ ions are preferentially extracted by KIT-6-1,2-PDDA, whereas light REEs with larger ionic radius are favored by KIT-6-1,3-PDDA. The exposure of bauxite residue digestion solution containing REEs as well as a number of types of competitive ions (including Th and U) to the sorbents results in selective recovery of target REEs. The possibility of regenerating the mesoporous sorbents through a simple loading-stripping-regeneration process is demonstrated over up to five cycles with no significant loss in REE extraction capacity, suggesting adequate chem. and structural stability of the new sorbent materials.

ACS Applied Materials & Interfaces 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 C10H10O6, COA of Formula: C10H10O6.

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

Imamoto, Tsuneo published the artcileReduction of organic compounds with rare-earth intermetallics containing absorbed hydrogen, Product Details of C15H15OP, the publication is Journal of Organic Chemistry (1987), 52(26), 5695-9, database is CAplus.

The hydrogenation of organic compounds with rare-earth intermetallic hydrides has been investigated. Alkynes, alkenes, aldehydes, ketones, nitriles, imines, and nitro compounds are hydrogenated in excellent yields with LaNi₅H₆ or LaNi_4.5Al_0.5H₅ at 0-60¡ã. The present hydrogenation method has the following characteristic features: (1) The intermetallic compounds (alloys) are not poisoned by compounds containing an amino group or a halogen atom. (2) The alloys can be used repeatedly without decrease in activity. (3) The reaction conditions are mild, and selective hydrogenations of some organic functional groups can be achieved. The reaction mechanism of this hydrogenation is briefly discussed in terms of stereochem. and H/D exchange reactions.

Journal of Organic Chemistry 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, Product Details of C15H15OP.

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

Dikhtievskaya, L. V. published the artcilePMR-spectroscopic study of solubilization of organic compounds by micellar solutions of aliphatic amines, Synthetic Route of 2016-56-0, the publication is Vestsi Akademii Navuk BSSR, Seryya Khimichnykh Navuk (1989), 21-4, database is CAplus.

NMR spectra for aqueous micellar solutions of C₁₂-C₁₈-aliphatic amine acetate surfactants modified by solubilization of oleophilic organic compounds showed that the action of the solubilizate on the structure and ionic-mol. composition of the micellar solutions depended both on the length of the hydrocarbon portion of the surfactant and on the nature of the solubilizate. For C₁₂ and C₁₄ amines, the greatest structure changes were observed during colloidal dissolution of heptanol, caprylic acid, and ¦Á-naphthol. Heptane, naphthalene, and benzene had little or no influence on the micellar structure. C₁₆ and C₁₈ amines were more susceptible to the changes than C₁₂ or C₁₄ amines. In the case of C₁₈ amine, practically all of the solubilizates caused loosening of the micelle and increased ionization of polar groups. In sylvinite ore enrichment by flotation, the addition of oleophilic compounds had the greatest effect on C₁₈ amine in increasing its flotation activity.

Vestsi Akademii Navuk BSSR, Seryya Khimichnykh Navuk 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, Synthetic Route of 2016-56-0.

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

Dikhtievskaya, L. V. published the artcileNMR study of micellar structure of higher aliphatic amine solutions, Category: catalysis-chemistry, the publication is Doklady Akademii Nauk BSSR (1987), 31(6), 543-6, database is CAplus.

A ¹H NMR study of 2% amine acetate (dodecyl-, tetradecyl-, hexadecyl, octadecylamine acetate) solutions in D₂O at 30-90¡ã showed that maximum flotation activity occurred at 50-90¡ã for C₁₂ and C₁₄, 40-60¡ã for C₁₆, and 60-80¡ã for C₁₈ amine acetates. Min. activity was observed at 30-40 and 45-60¡ã for C₁₆ and C₁₈ amine acetates, resp.

Doklady Akademii Nauk BSSR 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, Category: catalysis-chemistry.

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

Xue, Yulan published the artcileFundamental study on the treatment of acid mine wastewater containing iron and sulfate ions by the neutralization-flotation method, Formula: C14H31NO2, the publication is Zhongnan Kuangye Xueyuan Xuebao (1982), 63-9, database is CAplus.

Artificial acidic mine wastewater containing 1000 mg Fe(III)/L and 6000 mg SO₄^2-/L at pH 2.0 is treated with CaCO₃, gypsum, and Fe(OH)₃ and precipitated by neutralization at pH <5.0. By the slow neutralization and aging process with DAA (dodecylammonium?acetate??[2016-56-0]) gypsum can be separated from Fe(OH)₃ by flotation. However, by a rapid neutralization in the presence of 29 mg/L DAA and <29 mg/L starch??[9005-25-8] as flocculant gypsum and Fe(OH)₃ are well separated from each other by flotation and sedimentation, resp. at pH 4.8-5.1 with recoveries of 90 and 92%.

Zhongnan Kuangye Xueyuan Xuebao 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 C4H6O3, Formula: C14H31NO2.

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

Miyakoshi, Hitoshi published the artcile1,2,3-Triazole-Containing Uracil Derivatives with Excellent Pharmacokinetics as a Novel Class of Potent Human Deoxyuridine Triphosphatase Inhibitors, Recommanded Product: 2-(3-(Benzyloxy)phenyl)acetic acid, the publication is Journal of Medicinal Chemistry (2012), 55(14), 6427-6437, database is CAplus and MEDLINE.

Deoxyuridine triphosphatase (dUTPase) has emerged as a potential target for drug development as a 5-fluorouracil-based combination chemotherapy. The design and synthesis of a novel class of human dUTPase inhibitors, 1,2,3-triazole-containing uracil derivatives, is described. Compound I, which possesses 1,5-disubstituted 1,2,3-triazole moiety that mimics the amide bond of tert-amide-containing inhibitor II locked in a cis conformation showed potent inhibitory activity, and its structure-activity relationship studies led us to the discovery of highly potent inhibitors III and IV (IC₅₀ = ?0.029 ¦ÌM). These derivatives dramatically enhanced the growth inhibition activity of 5-fluoro-2′-deoxyuridine against HeLa S3 cells in vitro (EC₅₀ = ?0.05 ¦ÌM). In addition, compound IV exhibited a markedly improved pharmacokinetic profile as a result of the introduction of a benzylic hydroxy group and significantly enhanced the antitumor activity of 5-fluorouracil against human breast cancer MX-1 xenograft model in mice. These data indicate that IV is a promising candidate for combination cancer chemotherapies with TS inhibitors.

Journal of Medicinal Chemistry published new progress about 1860-58-8. 1860-58-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(3-(Benzyloxy)phenyl)acetic acid, and the molecular formula is C15H14O3, Recommanded Product: 2-(3-(Benzyloxy)phenyl)acetic acid.

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

Moons, Sam J. published the artcile¦Á-Selective Glycosylation with ¦Â-Glycosyl Sulfonium Ions Prepared via Intramolecular Alkylation, Recommanded Product: 2,4,6-Trimethoxybenzenethiol, the publication is Journal of Organic Chemistry (2019), 84(7), 4486-4500, database is CAplus and MEDLINE.

Stereoselective glycosylation remains the main challenge in the chem. synthesis of oligosaccharides. Herein we report a simple method to convert thioglycosides into ¦Â-sulfonium ions via an intramol. alkylation reaction leading to highly selective glycosylation for a variety of glycosyl acceptors. The influence of the thioglycoside substituent and the protecting group pattern on the glycosyl donor was investigated and showed a clear correlation with the observed stereoselectivity.

Journal of Organic Chemistry published new progress about 77189-99-2. 77189-99-2 belongs to catalysis-chemistry, auxiliary class Thiophenol,Benzene,Ether, name is 2,4,6-Trimethoxybenzenethiol, and the molecular formula is C9H12O3S, Recommanded Product: 2,4,6-Trimethoxybenzenethiol.

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