Tag: M.W=200-250

Tsunekawa, Masami published the artcileReactions of collector ions and ions from salt-type minerals, Recommanded Product: Dodecylamineacetate, the publication is Shigen to Sozai (1990), 106(1), 47-51, database is CAplus.

Precipitation reactions between 6 surfactants and several cations or anions of salt-type minerals were studied by nephelometry. Solubility products were determined for precipitates of metal ions with Na dodecylsulfate(SDS), n-oleoylsarcosine(OLSA) and Na oleate(NaOl), whereas the mini. concentrations of metal ions or anions to form precipitates with Na octadecylsulfosuccinamate(SOSS), N-tallow-1,3-diaminopropanedioleate(TDO) and dodecylammonium acetate (DAA) were measured. SOSS, OLSA, TDO and SDS preferred to react with La³⁺, Ce³⁺ and Ba²⁺ rather than CA²⁺ and Mn²⁺. TDO and DAA formed precipitates with WO₄^2-, SO₄^2-, H₂PO₄^– and HCO₃^– but not with F^–. Possible selective flotation and adsorption mechanism were discussed.

Shigen to Sozai 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 C21H37BO, Recommanded Product: Dodecylamineacetate.

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

Tomoda, Susumu published the artcileThe effect of surfactant properties on lapping behavior of materials, Computed Properties of 2016-56-0, the publication is International Journal of the Japan Society for Precision Engineering (1997), 31(1), 21-25, database is CAplus.

This paper describes the effect of the polarity of the surfactant on lapping behavior such as stock removal and the amount of minute powders adhered to or embedded in the lapping surface which arise out of the lapping plate and the workpiece. Brass, steel, glass and other materials were lapped by surfactants with different polarity and varied lapping plates. Most anion surfactants appear to be better mediums than cation or nonion surfactants for preventing any adhesion of the minute powders and increasing stock removal. When the silver surface is lapped by using fine aluminum oxide abrasive grains in n-dodecyltrimethyl-ammonium chloride solution (cation) on the glass lapping plate, it is highly resistant to wear, but the rigid glass lapping plate wears out.

International Journal of the Japan Society for Precision Engineering 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 C5H10Cl3O3P, Computed Properties of 2016-56-0.

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

Nicolaou, K. C. published the artcileIodine(V) Reagents in Organic Synthesis. Part 2. Access to Complex Molecular Architectures via Dess-Martin Periodinane-Generated o-Imidoquinones, Application of Allyldiphenylphosphine oxide, the publication is Journal of the American Chemical Society (2002), 124(10), 2221-2232, database is CAplus and MEDLINE.

2-Amido-1,4-benzoquinones can be prepared from 4-substituted anilides lacking pendant alkenes by treatment with DMP and water followed by careful workup under neutral conditions. The oxidative preparation of 2-amido-1,4-benzoquinones has been used in the synthesis of the natural products epoxyquinomycin B and BE-10988 and in the preparation of a macrocyclic amide with a tetrahydronaphthoquinone moiety. Ortho-substituted N-aryl acetamides lacking pendant alkenes undergo oxidation with DMP and water to give o-imidoquinones which are stable for several months when stored under argon at low temperature in the absence of light. O-imidoquinones undergo intermol. Diels-Alder cycloadditions with vinyl ethers and sulfides to give phenoxazines. The treatment of anilides containing pendant alkenes with Dess-Martin periodinane (DMP) in the presence of water gives oxazine-containing polycyclic compounds by stereoselective oxidation to o-imidoquinones followed by stereoselective intramol. Diels-Alder cycloaddition The isobutyrylaminophenylheptadiene (E)-Me₂CHCONH-4-C₆H₄CH₂CH₂CH₂CH:CHCH:CH₂ undergoes stereoselective oxidative cyclization upon treatment with DMP in methylene chloride to give ketoamidohydroxyphenalenone I in 28% yield and an amidoquinone which undergoes thermal Diels-Alder cyclization to give hexahydrobenzindene II in 25% yield; I and II are related to the natural products pseudopterosin A and elisabethin A, resp. The ketohydroxyamide moiety in I undergoes cyclization, condensation, and cyclocondensation reactions with aromatic amines, aromatic diamines, amino acid esters, and amino alcs. to give spirocycles, fused diazaheterocycles, and phenalene derivatives

Journal of the American Chemical Society 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, Application of Allyldiphenylphosphine oxide.

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

Nicolaou, K. C. published the artcileNew synthetic technology for the construction of N-containing quinones and derivatives thereof: total synthesis of epoxyquinomycin B, COA of Formula: C15H15OP, the publication is Angewandte Chemie, International Edition (2001), 40(1), 207-210, database is CAplus and MEDLINE.

N-substituted p-quinones and o-azaquinones are prepared regioselectively in a one-step tandem double oxidation of anilides by Dess-Martin periodinane. This process is applied to the short and efficient total synthesis of epoxyquinomycin B. The intermol. and intramol. Diels-Alder reactions of N-containing quinones are demonstrated. The o-azaquinones are shown to participate in inverse electron demand Diels-Alder reactions with electron-rich olefins.

Angewandte Chemie, International Edition 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, COA of Formula: C15H15OP.

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

Andrews, Keith G. published the artcileCatalytic reductive N-alkylation of amines using carboxylic acids, Recommanded Product: 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine, the publication is Chemical Communications (Cambridge, United Kingdom) (2016), 52(9), 1855-1858, database is CAplus and MEDLINE.

A catalytic reductive alkylation reaction of primary or secondary amines with carboxylic acids is reported. The two-phase process involved silane mediated direct amidation followed by catalytic reduction

Chemical Communications (Cambridge, United Kingdom) 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, Recommanded Product: 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine.

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

Xiang, Jing published the artcileThe highly chemoselective transfer hydrogenation of the carbon-carbon double bond of conjugated nitroalkenes by a rhodium complex, Product Details of C10H11NO4, the publication is Tetrahedron (2012), 68(24), 4609-4620, database is CAplus.

Chemoselective transfer hydrogenation of conjugated nitroalkenes catalyzed by [RhCl₂Cp^*]₂-diamine complex (Cp^*=¦Ç⁵-C₅Me₅) using HCOOH/Et₃N (5:2) (TEAF) as a hydrogen source was realized. A variety of nitrostyrenes, ¦Â-Me nitrostyrenes, and 3-methyl-4-nitro-5-alkenyl-isoxazoles were reduced smoothly in good to excellent yields in short reaction time. Other functional groups are inert under the reaction conditions.

Tetrahedron published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C17H20ClN3, Product Details of C10H11NO4.

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

Yin, Ji-ming published the artcileCopper chelation by trientine dihydrochloride inhibits liver RFA-induced inflammatory responses in vivo, Computed Properties of 38260-01-4, the publication is Inflammation Research (2016), 65(12), 1009-1020, database is CAplus and MEDLINE.

Objective: Hepatocellular carcinoma (HCC) is the fifth most common cancer and the third most common cause of cancer-related death worldwide. Radiofrequency ablation (RFA) is currently performed widely for managing HCC. RFA treatment causes damage around the ablation. Trientine dihydrochloride has been used to reduce the copper in liver. Methods: The rats were treated with trientine dihydrochloride for 5 days before liver RFA. Liver function, copper concentration, inflammation biomarkers and MDA, SOD were analyzed after RFA treatment for 2 h, 2 and 5 days. Results: The results indicated that trientine dihydrochloride reduced the copper in plasma and liver tissue significantly. And trientine dihydrochloride significantly inhibited RFA-induced inflammatory gene expression in liver. Similar inhibitory effects of trientine dihydrochloride were observed on ROS-induced malondialdehyde production in liver tissues. Conclusion: These results suggest that pre-treatment with the selective copper chelator trientine dihydrochloride can inhibit inflammatory response effectively during and after liver RFA in vivo. Chelation of copper to a lower level before liver RFA may be a novel strategy to prevent or ameliorate inflammatory responses in liver induced by RFA and to protect the parenchyma tissues in liver during and after RFA in HCC patients.

Inflammation Research 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 C5H8N2O, Computed Properties of 38260-01-4.

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

Yao, Wei published the artcilePhoto-induced C-H bond activation of N,N’-dialkylethylenediamine upon aza-Michael addition to 1,8-pyrenedione: facile synthesis of fluorescent pyrene derivatives, Application In Synthesis of 140-28-3, the publication is Organic Chemistry Frontiers (2018), 5(10), 1679-1683, database is CAplus.

Reaction between 1,8-pyrenedione and N,N’-dialkylethylenediamine to form highly fluorescent products, via aza-Michael addition followed by double C-H activation facilitated by visible light is discovered. Remarkably, the reaction intermediates and mono C-H bond activation product could only be formed when the reaction was carried out in the presence of a base and UV-light (254 nm). Dehydrogenation of the intermediate under room lighting converts it to the final products. The reaction is a general one as it works with a number of ethylenediamines with different substituents. The reaction mechanisms suggested that nucleophilic addition of the amine followed by dehydrogenation occurs to restore aromaticity and give an amine substituted 1,8-pyrenedione intermediate. The C-H activation requires photoexcitation via a radical mechanism. This work opens a new avenue for the construction of novel mols. with a pyrene core as a fluorophore with good quantum yields.

Organic Chemistry Frontiers 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 C6H13NO2, Application In Synthesis of 140-28-3.

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

Gao, Enjun published the artcileSpiral frameworks constructed by 1,2-phenylene-dioxydiacetic acid as highly sensitive and selective luminescent probes to detect PO₄^3- ions in aqueous solutions, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is RSC Advances (2016), 6(89), 85704-85709, database is CAplus.

Three novel clubbed photo-luminescent lanthanide-organic frameworks 1D coordination polymers, [Ln(L)(NO₃)(H₂O)₂]_n (1-3) (where Ln is La, Ce, and Pr, resp., and H₂L = 1,2-phenylenedioxydiacetic acid), have been synthesized in a concise and reproducible manner under hydrothermal conditions. It is worth noting that the H₂L ligand is used for the first time in synthesis complexes. 1, 2 and 3 possess same structure with the same topol. of [3^3; 4^2; 5] built using Ln-L 1D helical chains. Fluorescence properties of the obtained complexes have been studied in detail, revealing that 3 can sensitively and selectively detect pollutant PO₄^3- among various anions.

RSC Advances 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, Application of 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Boca, R. published the artcileSlow magnetic relaxations in a ladder-type Dy(III) complex and its dinuclear analogue, Application In Synthesis of 5411-14-3, the publication is Dalton Transactions (2017), 46(16), 5344-5351, database is CAplus and MEDLINE.

The complex {[Dy₂(PDOA)₃(H₂O)₆]¡¤2H₂O}_n (1) (H₂PDOA = 1,2-phenylenedioxydiacetic acid) was prepared from aqueous solution Its crystal structure, built up of {-Dy-O-C-O-}_n chains interlinked by PDOA ligands yielding a ladder-like arrangement, was determined at 173 K. 1 Exhibits slow magnetic relaxation under a small magnetic field B_DC = 0.2 T with two (LF and HF) relaxation channels. The LF relaxation time at B_DC = 0.2 T and T = 1.85 K is as slow as ¦Ó(LF) = 46 ms whereas the HF channel is ¦Ó(HF) = 1.4 ms. The mole fraction of the LF species is x_LF = 0.76 at 1.85 K and it escapes progressively on heating. In the dinuclear analog [Dy₂(PDOA)₃(H₂O)₆]¡¤3.5H₂O (2) one PDOA ligand forms a bis(chelate) bridge between the two Dy(III) atoms yielding a local structure analogous to that in 1; however its a.c. susceptibility data show slightly different quant. characteristics of the single-mol. magnetic behavior.

Dalton Transactions 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, Application In Synthesis of 5411-14-3.

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