Tag: M.W=200-250

Thuery, Pierre published the artcileUranyl-Organic Assemblies with Acetate-Bearing Phenyl- and Cyclohexyl-Based Ligands, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Crystal Growth & Design (2011), 11(1), 347-355, database is CAplus.

Six novel complexes formed under hydrothermal conditions by uranyl ions with three ligands comprising a rigid phenyl- or cyclohexyl-containing platform, and two to four acetate arms were obtained. trigonal nodes. 1,3,5-Benzenetriacetic acid (H₃BTA) yielded [NMe₄][UO₂(BTA)]¡¤H₂O (1), in which the structure-directing counterion induces a two-dimensional, bilayer-type structure different from that previously reported, with both the tris-chelating ligand and the metal ion as. Two complexes were obtained with 1,2-phenylenedioxydiacetic acid (H₂PDDA), [UO₂(PDDA)(H₂O)] (2) and [H₂DABCO][(UO₂)₂(PDDA)₃]¡¤1.5H₂O (3). Complex 2 is a simple, ribbon-like, 1-dimensional polymer, while 3 is a nanotubular assembly built around the H-bonded, structure-directing counterions. Three complexes were obtained with trans-1,2-diaminocyclohexane-N,N,N’,N’-tetraacetic acid (H₄DCTA), a polyaminopolycarboxylic acid, with different bases, [UO₂(H₂DCTA)(H₂O)₂]¡¤H₂O (4), [UO₂(H₂DCTA)(H₂O)]¡¤1.5H₂O (5), and [UO₂Na(HDCTA)(H₂O)] (6). The N atoms are not coordinated, both of them (4) or only one (5 and 6) being protonated, and the carboxylic/ate groups are monodentate, except for one chelating in 6 and one nonbonding in 4. These differences in bonding result in various assemblies, 1-dimensional in 4 and two-dimensional in 5 and 6. The layers in 5 are strongly corrugated, with the cyclohexyl groups pointing on either side, and their packing displays oval-shaped channels, while the layers in 6 are planar, with the cyclohexyl groups located on one side, and further assembled into dimeric units by the disordered Na ions. These are the 1st crystal structures of actinide ion complexes with both H₂PDDA and H₄DCTA.

Crystal Growth & Design 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 C10H13NO2, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Tyrra, Wieland E. published the artcileOxidative perfluoroorganylation methods in group 12-16 chemistry The reactions of haloperfluoroorganics and In and InBr, a convenient new route to AgR_f (R_f = CF₃, C₆F₅) and reactions of AgR_f with group 12-16 elements, Recommanded Product: Trimethyl(perfluorophenyl)silane, the publication is Journal of Fluorine Chemistry (2001), 112(1), 149-152, database is CAplus.

Perfluoroiodo organics R_fI [R_f = n-C_nF_2n+1 (n = 1, 2, 3, 4, 6), i-C₃F₇, C₆F₅] and C₆F₅Br react with elemental In in polyethers or THF to give spectroscopic evidence for compounds In^IIR_fX (X = I, Br). All isolation attempts led to decomposition into In^III(R_f)₂I and In^II. In contrast, the reaction of In, 0.5Br₂ and C₆F₅Br in THF selectively and quant. yielded In(C₆F₅)Br₂¡¤2THF which was structurally characterized. The reaction of In(C₆F₅)Br₂¡¤2THF and acetylacetone (Hacac) quant. gave the distorted octahedral mol. In(acac)Br₂¡¤2THF. Perfluoroorganosilver(I) compounds Ag(R_f) (R_f = CF₃, C₆F₅) are conveniently and selectively prepared from AgF and Me₃SiR_f in several nitrile solvents. [PNP][Ag^I(CF₃)₂] ([PNP] = bis(triphenylphosphoranyliden)ammonium) is isolated from the reaction mixture after addition of one equivalent of [PNP]Cl. Using excess of [PNP]Cl, [PNP][Ag^I(CF₃)Cl] is formed which was characterized by single crystal structure anal. Besides its properties as a nucleophilic perfluoroorganylating reagent, AgR_f exhibits to be an excellent oxidative perfluoroorganylation reagent in reactions with various elements of groups 12-16 to give the corresponding perfluoroorgano element compounds in moderate to excellent yields leaving elemental Ag.

Journal of Fluorine 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 C65H82N2O18S2, Recommanded Product: Trimethyl(perfluorophenyl)silane.

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

Uno, Taku published the artcileKidney dysfunction in Wilson disease, Quality Control of 38260-01-4, the publication is Biomedical Research on Trace Elements (1998), 9(2), 85-94, database is CAplus.

Forty-seven patients with Wilson disease were studied for their kidney dysfunction. Among them, 36 patients were not treated and 11 were treated. Over one-third of the patients revealed renal tubular abnormalities at first visit to our clinic. Such abnormalities could not explain the cause of hypouricemia in the fulminant and hemolytic anemia type of Wilson disease. Ten of 31 patients (32.3%) had nephrocalcinosis. These findings were almost completely improved following prolonged treatment with penicillamine or trientine hydrochloride. Significant microscopic hematuria was found in 21 of the 36 treated patients (58.3%) and proteinuria was found in 14 of these 36 patients (38.9%). Except for the fulminant and hemolytic anemia type of Wilson disease, dysmorphic urinary RBCs, granular and RBC casts were found on routine light microscopy in our study. These urinary findings suggest glomerular dysfunction. Besides the occurrence of local damage to the kidney or an irritant effect of copper on the glomeruli and renal tubules, we speculate that glomerular dysfunction due to liver cirrhosis should be considered, including for example, hepatic IgA glomerulonephritis.

Biomedical Research on Trace Elements 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 C10H16Br3N, Quality Control of 38260-01-4.

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

Zhang, Heng published the artcileResearch progress in the synthesis of 4,4′-difluorodiphenylmethane, SDS of cas: 457-68-1, the publication is Youjifu Gongye (2014), 35-37, 42, database is CAplus.

A review. Physicochem. properties, spectral properties and application of 4,4′-difluorodiphenylmethane are introduced. Research progress situation in synthesis of 4,4′-difluorodiphenylmethane at home and abroad are summarized.

Youjifu Gongye published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C3H6O2, SDS of cas: 457-68-1.

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

Sahoo, Santosh K. published the artcileAn unprecedented oxidative intermolecular homo coupling reaction between two sp³C-sp³C centers under metal-free condition, SDS of cas: 457-68-1, the publication is Tetrahedron Letters (2016), 57(31), 3476-3480, database is CAplus.

An unprecedented formation of benzylic sp³C-sp³C coupled dibenzylic products was illustrated. The reactions were carried out in the presence of three oxidizing reagents, i.e., diacetoxy-iodobenzene (IBDA), N-fluorobenzenesulfonimide (NFSI), and pyridine (Py) using toluene derivatives

Tetrahedron Letters published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, SDS of cas: 457-68-1.

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

Smith, G. published the artcileTriethylene tetramine. New potentiator of antibiotic activity, Synthetic Route of 38260-01-4, the publication is Experientia (1975), 31(1), 84-5, database is CAplus and MEDLINE.

Triethylenetetramine-2HCl (I) [38260-01-4] increased the efficacy of carbenicillin [4697-36-3] therapy against Pseudomonas aeruginosa in vitro and in mice. I apparently increased the permeability of the bacteria to the antibiotic, thereby enhancing the ability of the antibiotic to reach its site of action.

Experientia 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 C9H12BClO3, Synthetic Route of 38260-01-4.

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

Stoica, Ligia published the artcileSeparation by flotation of copper(II) from dilute solutions with aminic collectors, Quality Control of 2016-56-0, the publication is Revistade Chimie (Bucharest, Romania) (1988), 39(11), 947-53, database is CAplus.

The recovery of Cu (3×10^-6-1×10^-4 M) from wastewaters was >95% by flotation with laurylamine and stearylamine acetates at pH 9 for 2 min. The optimum concentration of the collectors was (0.3-0.4) ¡Á 10^-3 M.

Revistade Chimie (Bucharest, Romania) 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 C13H10O2, Quality Control of 2016-56-0.

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

Sun, Sen published the artcileSynthesis of 4,4′-difluorobenzophenone by diazotization and oxidation of 4,4′-diaminodiphenylmethane, COA of Formula: C13H10F2, the publication is Huaxue Yu Nianhe (2003), 262-263, database is CAplus.

4,4′-Difluorobenzophenone was prepared by diazotization of 4,4′-diaminodiphenylmethane in fluoroboric acid and oxidation The target product was obtained in 84% yield under optimal conditions. An economic and effective production synthetic route was introduced and discussed.

Huaxue Yu Nianhe published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C14H21BO2, COA of Formula: C13H10F2.

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

Tansjo, L. published the artcileReaction of phenylsilicon fluorides with primary amines, Name: Difluorodiphenylsilane, the publication is Acta Chemica Scandinavica (1964), 18(2), 465-73, database is CAplus.

cf. preceding abstract Ph₂SiF₂ (33.5 g.) in 100 mL. dry Et₂O added to 0.15 mol PhMgBr in 100 mL. Et₂O, the stirred mixture refluxed 3 h. and kept overnight, Et₂O distilled, the mixture held 6 h. at 100-110¡ã, and Et₂O and 150 mL. 2.5N HCl added gave 53% Ph₃SiF (I). A vigorous reaction occurred when an aliphatic primary amine was added to PhSiF₃ (II); distilling the mixture gave the amine and a residue that distilled at the b.p. of II and deposited in the cold part of the system as a fuming white solid. When Et₂O solutions of II and amine were mixed, a white precipitate of (RNH₃)₂[SiF₅Ph] immediately formed. With PrNH₂ 0.33 molar equivalent salt was formed per mol of II. Some evidence supported the view that the reaction proceeded to form mainly (PrNH₃)₂[SiF₅Ph] (III), but the presence of all compounds PhSi(NHR)_nF_3-n (R = Pr; n = 0, 1, 2, 3) was indicated. These products (where R = H, Me, Et, Pr, or Bu) were white solids, m. >250¡ã, sublimed 225-75¡ã (IR spectra determined). They dissolved in H₂O to give acidic solutions, which became turbid on standing, owing to hydrolysis. III (0.587 g.) and 0.342 g. PhSi(NHPr)₃ heated 1 h. at 60¡ã gave PhSi(NHPr)F₂ and PrNH₂. Ph₂SiF₂ (IV) reacted exothermally with primary amines to yield solids far above the m.p. of the components. No precipitate formed when the 2 components were mixed at room temperature in Et₂O or C₆H₆; in MeCN an increase in conductivity occurred, indicating ion formation. Dry HF added to solutions of PrNH₂ and excess IV in Et₂O, and the mixture held overnight gave a solid with IR spectrum identical with III. PrNH₃F (0.238 g.) and 1.5 g. IV reacted exothermally to give 0.338 g. III and 0.063 g. C₆H₆, indicating cleavage of the Si-Ph bond. No reaction was observed with I and primary amines, and no increase in conductivity was obtained in MeCN. When dry HF was added to an Et₂O solution of I and a primary amine, the only solid product was the alkylammonium fluoride. II and excess dry HF after 20 h. at room temperature gave <1% C₆H₆; with the triamyl compound no pentane was formed. Similarly, IV and excess HF gave 44% II and C₆H₆; with I and excess HF, all the I was converted to Ph₂SiF₂, and 43% of this compound had reacted further to give II.

Acta Chemica Scandinavica 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 C19H14N2, Name: Difluorodiphenylsilane.

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

Okudera, Mitsuru published the artcileAn in vitro study for caries prevention using three organic fluoride agents, Product Details of C12H10F2Si, the publication is Kanagawa Shigaku (1984), 18(4), 375-93, database is CAplus.

The penetration of F^– into human dental enamel and dentin in vitro was enhanced in the presence of diphenyldifluorosilane??[312-40-3]. However, the penetration was not significantly influenced by the other 2 agents tested, tetrabutylammonium?fluoride??[429-41-4] and tetraethylammonium?fluoride??[665-46-3]. Apparently, diphenyldifluorosilane is effective in preventing dental caries.

Kanagawa Shigaku 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 C12H10F2Si, Product Details of C12H10F2Si.

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