Month: December 2022

Nakazawa, Hiroshi published the artcileSeparation of sericite from quartz by amine flotation, Recommanded Product: Dodecylamineacetate, the publication is Nippon Kogyo Kaishi (1988), 104(1209), 803-7, database is CAplus.

Sericite separation from quartz by flotation was investigated, using dodlecylammonium acetate (DAA) as the collector. Sericite floats in acidic solution with a large amount of DAA. Sericite can be selectively separated from quartz in a pH 2.5 solution The addition of Al³⁺ decreases the amount of DAA required for the flotation of sericite. In a pH 10.5 solution, the separation of sericite from quartz is not good but, with an addition of Al³⁺, sericite can be separated from quartz.

Nippon Kogyo Kaishi 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, Recommanded Product: Dodecylamineacetate.

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

Kursun, Ilgin published the artcileApplication of novel flotation process for removal of feldsphatic minerals from quartz sands, HPLC of Formula: 2016-56-0, the publication is Asian Journal of Chemistry (2004), 16(2), 937-941, database is CAplus.

In this study, conventional flotation process using hydrofluoric acid was compared to a novel flotation process without using hydrofluoric acid for separation of feldspar from quartz sands. In the new method, feldspars are floated from quartz sands using two different reagents; sodium oleate and dodecyl amine acetate together as collectors for satisfactory and environment friendly beneficiation without using hydrofluoric acid.

Asian Journal of Chemistry 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, HPLC of Formula: 2016-56-0.

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

Presset, Marc published the artcileComplementary Regioselectivity in Rh(III)-Catalyzed Insertions of Potassium Vinyltrifluoroborate via C-H Activation: Preparation and Use of 4-Trifluoroboratotetrahydroisoquinolones, Application In Synthesis of 1293990-73-4, the publication is Organic Letters (2013), 15(7), 1528-1531, database is CAplus and MEDLINE.

Potassium vinyltrifluoroborate was an efficient partner with benzamide derivatives for Rh(III)-catalyzed annulations. 4-Trifluoroboratotetrahydroisoquinolones were generated under mild conditions, affording a regioisomerically complementary substitution pattern to other alkenes in related reactions. These new boron-containing building blocks were derivatized by N-arylations, retaining the boron substituent for further elaboration.

Organic Letters published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C6H12F3NO5S, Application In Synthesis of 1293990-73-4.

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

Fischer, Ernst Otto published the artcileAromatic complexes of metals. XXII. Thiophenechromiumtricarbonyl, Recommanded Product: 2-Methyl-4-phenylbutanoic acid, the publication is Chemische Berichte (1958), 2395-9, database is CAplus.

Cr-(CO)₆ (I) and thiophene (II) heated in a sealed tube gave II. Cr(CO)₃ (III) and 3 equivalents CO. The diamagnetic III, which is in the crystalline state fairly stable in air, demonstrates for the 1st time also that aromatic heterocycles are capable of binding transition metals centrally through their ¦Ð-electron sextet. I (2.2 g.) and 40 cc. pure II heated 5-7 hrs. in a sealed tube under N at 205-10¡ã, cooled, filtered under N, and evaporated in vacuo, the deep orange-red, crystalline residue dissolved in a few cc. 1:1 C₆H₆-petr. ether, and chromatographed on Al₂O₃, a yellow zone washed out, the orange-red zone eluted with C₆H₆, the deep orange-red eluate evaporated, and the residue sublimed in vacuo at 85-95¡ã yielded 60-75 mg. III, red crystals. The molar magnetic susceptibilities of III at 293 and 90¡ãK. were -168 and -163 ¡Á 10^-6 cu. cm./mole, resp.

Chemische Berichte 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 C11H14O2, Recommanded Product: 2-Methyl-4-phenylbutanoic acid.

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

Howell, Barbara F. published the artcileRadiation cured, environmentally compliant, pigmented coatings, Synthetic Route of 2909-77-5, the publication is Proceedings – Electrochemical Society (1997), 29-39, database is CAplus.

Pigmented epoxy acrylate coatings were developed which could be successfully cured using a xenon or mercury lamp. Coatings applied to grit blasted steel panels passed crosshatch adhesion, impact, balanced beam scrape adhesion, and 500-h 49¡ã salt fog tests. A pigment formulation suitable for radiation curing was found. In addition, visible light-sensitive, photobleaching photoinitiators were tested, and it was found that the pigmented coating formulation could be successfully cured with a metal halide electrodeless bulb, which emits light in the short visible wavelength range, as well as with a sufficiently intense tungsten halogen lamp. Because of the photobleaching, the coating did not yellow, and problems with exposure to UV radiation were minimized with visible radiation bulbs.

Proceedings – Electrochemical 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 C14H23N, Synthetic Route of 2909-77-5.

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

Stewart, Ross published the artcileStrongly basic systems. IV. Substituent effects on the acidity of aromatic amines, Quality Control of 1821-27-8, the publication is Canadian Journal of Chemistry (1964), 42(7), 1694-8, database is CAplus.

The effect of ring substituents on the acidity of anilines and diphenylamines is examined In general the effects are similar to those found in the analogous ionization of phenols. The acidities of diphenylamines having 2 or 3 nitro groups in one ring and variable substituents in the other ring can be correlated by the Hammett relation. A good correlation is found between the acidities and basicities of aromatic amines, although basicity is more sensitive to the presence of ring substituents than is acidity. The relation of these results to the general question of 1st and 2nd dissociation constants of dibasic acids is considered.

Canadian Journal of Chemistry 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 C17H18N3NaO3S, Quality Control of 1821-27-8.

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

Shundrina, Inna K. published the artcileSynthesis, Electrochemical Reduction and Radical Anions of 2-[Bis(4-amino(nitro)phenyl)aminomethyl]-9H-thioxanthene-9-one Derivatives, Name: Bis(4-nitrophenyl)amine, the publication is European Journal of Organic Chemistry (2018), 2018(26), 3471-3480, database is CAplus.

2-[Bis(4-amino(nitro)phenyl)aminomethyl]-9H-thioxanthene-9-ones and their S-oxide derivatives have been synthesized, and their electrochem. reduction (ECR) in N,N-dimethylformamide (DMF) and MeCN has been studied by cyclic voltammetry (CV). The thioxanthene-9-one group [Th(O)S] and thioxanthene-9-one S-dioxide group [Th(O)SO₂] determine the first one-electron peak potentials of 2-[bis(4-aminophenyl)aminomethyl]-9H-Th(O)S/Th(O)SO₂. The first peak potentials of the corresponding dinitro compounds are determined by the ratio of reduction potentials of bis(4-nitrophenyl)amino and 9H-thioxanthene-9-ones moieties. Radical anions (RA) of the synthesized compounds have been obtained by ECR in DMF and MeCN and characterized by EPR spectroscopy together with DFT calculations at the (U)B3LYP/6-31 + G/PCM level of theory. Th(O)S and Th(O)SO₂ groups are thermally stable up to 270 ¡ãC. The synthesized 2-[bis(4-aminophenyl)aminomethyl]-9H-Th(O)S/Th(O)SO₂ are electrochem. active monomers for subsequent synthesis of the corresponding electroactive polyimides with thioxanthene-9-one based pendant groups for their applications in the design of nonvolatile memory storage devices. The pendant groups are characterized by low redox potentials and reversibility towards electron transfer.

European Journal of Organic Chemistry 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 C9H7NO2, Name: Bis(4-nitrophenyl)amine.

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

Bevers, Susan published the artcilePerylene- and Naphthalene-Based Linkers for Duplex and Triplex Stabilization, Application In Synthesis of 215297-17-9, the publication is Journal of the American Chemical Society (1998), 120(42), 11004-11005, database is CAplus.

Perylene and naphthalene were chosen for development into planar ¦Ð-stacking linkers in DNA duplex or triplex preparations Linkers were prepared by reaction of the corresponding tetra-carboxylic acid dianhydride with 2-aminoethoxyethanol or its tBDMS derivative Thermal stabilities of DNA duplex (5′-TCTTTTCTT-linker-AAGAAAAGA) or triplex (5′-TCTTTTCTT-linker-TTCTTTTCT/9-mer or 19-mer) systems. Both the perylene and naphthalene-based duplex linkers showed increased T_M values, compared to a duplex tethered by hexa(ethylene glycol), but the perylene linker showed only a small increase over naphthalene, perhaps because it is significantly larger than necessary to bridge the phosphate residues at the terminus of a B-form helix, while the naphthalene-based linker can be more optimally positioned at the end of a duplex. In triplex formation, the most significant T_M enhancements were those that occurred with the 19-mer complex, where the perylene-based linker showed a 19¡ã increase at pH 5.5; for both linkers, this is perhaps due to their potential to provide stacking interactions with all three residues, and possibly with the first base residue of the target strand that extends beyond the triplex region.

Journal of the American Chemical Society published new progress about 215297-17-9. 215297-17-9 belongs to catalysis-chemistry, auxiliary class Linker,PROTAC Linker, name is 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine, and the molecular formula is C10H25NO2Si, Application In Synthesis of 215297-17-9.

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

Lutskii, A. E. published the artcileInteraction of functional groups through ¦Ð-electron systems. V. Interaction through aromatic rings connected by a monofunctional bridging group, Category: catalysis-chemistry, the publication is Zhurnal Fizicheskoi Khimii (1968), 42(8), 1861-4, database is CAplus.

Dipole moments (¦ÌH) of 4-XC6H4ZC6H4Y-4′ where Z was CH2, O, S, NH, and CH2CH2 and X and Y were NO2, CN, Cl, Br, I, OH, Me, and NH2 were measured. Values of ¦ÌH prove existence of the interaction of the substituents in 4,4′ position through bridges with ¦Ò and p electrons. Any change in the electron d. at Z in the case of its interaction with substituents of the 1st ring causes a change in degree of its interaction with substituents of the 2nd ring. Only electron effects are transmitted from one substituent to the other substituents of the rings through the bridging groups.

Zhurnal Fizicheskoi Khimii 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, Category: catalysis-chemistry.

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

Matsuoka, Keitaro published the artcileTransition-metal-free nucleophilic ²¹¹At-astatination of spirocyclic aryliodonium ylides, Name: Tetraethylammonium hydrogencarbonate, the publication is Organic & Biomolecular Chemistry (2021), 19(25), 5525-5528, database is CAplus and MEDLINE.

The transition-metal-free ²¹¹At-astatination of spirocyclic aryliodonium ylides I (R = Et 2-methyl-2-phenoxypropanoate, quinolin-6-yl, 3-methyl-1,2-benzoxazol-5-yl, etc.) via a nucleophilic aromatic substitution reaction is described. This method enables the preparation of ²¹¹At-radiolabeled compounds ²¹¹AtR derived from multi-functionalized mols. and heteroarenes in good to excellent radiochem. yields.

Organic & Biomolecular Chemistry published new progress about 17351-61-0. 17351-61-0 belongs to catalysis-chemistry, auxiliary class Phase Transfer Catalyst, name is Tetraethylammonium hydrogencarbonate, and the molecular formula is C9H21NO3, Name: Tetraethylammonium hydrogencarbonate.

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