Tag: M.W=200-250

El Hajjaji, Fadoua published the artcileElectrochemical, quantum calculations and Monte Carlo simulation studies of N1,N2-bis(1-phenylethylidene)ethane-1,2-diamine as a corrosion inhibitor for carbon steel in a 1.0 M hydrochloric acid solution, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine, the publication is Portugaliae Electrochimica Acta (2019), 37(1), 23-42, database is CAplus.

N1,N2-Bis(1-Phenylethylidene)ethane-1,2-diamine (PEED) was tested as a corrosion inhibitor for C-steel in a 1.0 M HCl solution, by using potentiodynamic polarization and electrochem. impedance spectroscopy (EIS) techniques. The results showed that PEED is a very good inhibitor, as its inhibition efficiency reached 93.8%, with a concentration of 1.0 × 10^-3 M, at 298 K. Tafel polarization study revealed that PEED acted as a mixed type inhibitor that obeyed Langmuir adsorption isotherm. The thermodn. activation parameters for the corrosion reaction were calculated and discussed. Quantum chem. parameters and Fukui function were obtained by DMol³/GGA/PW91/DNP+ level of theory, which was performed using Materials Studiov 8.0 software from Biovia-Accelrys. Monte Carlo simulation was implemented to search for the equilibrium configurations of the PEED/Fe(111) adsorption system, in a 1.0 M hydrochloric acid solution

Portugaliae Electrochimica Acta 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, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine.

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

Shirali, Somayeh published the artcilePreparation and Characterization of Novel Hybrid Nanomaterial Catalyst MCM-41@AzaCrown-SB-cu and its Application in Synthesis of Hexahydroquinoline Derivatives under Solvent-Free Conditions, Safety of 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Silicon (2021), 13(8), 2479-2491, database is CAplus.

Synthesis of efficient and reusable catalyst was carried out by immobilizing azacrown ether onto the covalently linked amine-functionalized mesoporous MCM-41 via a simple method. Application of this linked azacrown ether functionalized MCM-41 catalyst was also investigated as an effective, heterogeneous in the synthesis of hexahydroquinoline derivatives I (R = H, 4-Me, 4-Cl, etc.) under solvent-free conditions at environment temperature The heterogeneous catalyst is characterized by TGA, XRD, TEM, ¹HNMR, ¹³CNMR, and FT-IR techniques. The results of theses anal. showed that, MCM-41@azacrown-SB-Cu catalyst with a 22.99% mol loading of copper has given excellent catalytic activity and high efficiency in a short time. It is noted that one of the most valuable factors in this work is the recyclability of the catalyst.

Silicon 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 C10H12F6N4O6PdS2, Safety of 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

shirali, Somayeh published the artcilePreparation and characterization of novel hybrid nanomaterial catalyst MCM-41@AzaCrown-SB-Cu and its application in synthesis of 1, 2, 3-triazole derivatives in click chemistry, HPLC of Formula: 5411-14-3, the publication is Journal of Porous Materials (2020), 27(6), 1601-1611, database is CAplus.

Synthesis of efficient and reusable catalyst was carried out by immobilization of azacrown ether onto the covalently linked amine-functionalized mesoporous MCM-41 via a simple method. Application of this linked azacrown ether functionalized MCM-41 catalyst was also investigated as an effective, heterogeneous and host material in the regioselective ring opening and triazole cyclization of epoxides by phenylacetylene and sodium azide in click reaction. The heterogeneous catalyst was characterized by TGA,XRD,TEM, ¹HNMR, ¹³CNMR and FT-IR techniques. The results of theses anal. showed that, MCM-41@azacrown-Cu with a 22.99% mol loading of copper has given excellent catalytic activity and high efficiency in short time. It is noted that one of the most valuable factors in this work is the recyclability of the catalyst.

Journal of Porous Materials 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 C10H10O3, HPLC of Formula: 5411-14-3.

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

Neggad, Abdelhamid published the artcileA new method of extracting polyphenols from honey using a biosorbent compared to the commercial resin amberlite XAD2, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is Journal of Separation Science (2021), 44(10), 2089-2096, database is CAplus and MEDLINE.

A new extraction method of polyphenols from honey using a biodegradable resin was developed and compared with the common com. resin amberlite XAD2. For this purpose, three honey samples of Algerian origin were selected for the different physicochem. and biochem. parameters study. After extraction of the target compounds by both resins, the polyphenol content was determined, the antioxidant activity was tested, and liquid chromatog.-mass spectrometry analyses were performed for identification and quantification. The results showed that physicochem. and biochem. parameters meet the norms of the International Honey Commission, and the H1 sample seemed to be of high quality. The optimal conditions of extraction by biodegradable resin were a pH of 3, an adsorption dose of 40 g/L, a contact time of 50 min, an extraction temperature of 60°C, and no stirring. The regeneration and reuse number of both resins was three cycles. The polyphenol contents demonstrated a higher extraction efficiency of biosorbent than of XAD2, especially in H1. Liquid chromatog.-mass spectrometry analyses allowed for the identification and quantification of 15 compounds in the different honey samples extracted using both resins and the most abundant compound was 3,4,5-trimethoxybenzoic acid. In addition, the biosorbent extracts showed stronger antioxidant activities than the XAD2 extracts

Journal of Separation Science published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

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

Petrov, V. A. published the artcileReaction of (pentafluorophenyl)trimethylsilane with perfluorinated internal azaalkenes in the presence of cesium fluoride, Name: Trimethyl(perfluorophenyl)silane, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1990), 923-4, database is CAplus.

CF₃(CF₂)_mN:CF(CF₂)_nCF₃ (m = 1, n = 0; m = 3, n = 2) reacted with C₆F₅SiMe₃ in the presence of CsF to give 63 and 56% yields, resp., of CF₃(CF₂)_mN:C(C₆F₅)(CF₂)_nCF₃.

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya 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, Name: Trimethyl(perfluorophenyl)silane.

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

Frohn, Hermann-Josef published the artcileExplored routes to unknown polyfluoroorganyliodine hexafluorides, R_FIF₆, Product Details of C9H9F5Si, the publication is Journal of Fluorine Chemistry (2010), 131(10), 1000-1006, database is CAplus.

Two routes to R_FIF₆ compounds were investigated: (a) the substitution of F by R_F in IF₇ and (b) the fluorine addition to iodine in R_FIF₄ precursors. For route (a) the reagents C₆F₅SiMe₃, C₆F₅SiF₃, [NMe₄][C₆F₅SiF₄], C₆F₅BF₂, and 1,4-C₆F₄(BF₂)₂ were tested. C₆F₅IF₄ and CF₃CH₂IF₄ were used in route (b) and treated with the fluoro-oxidizers IF₇, [O₂][SbF₆]/KF, and K₂[NiF₆]/KF. The observed sidestep reactions in case of routes (a) and (b) are discussed. Interaction of C₆F₅SiX₃ (X = Me, F), C₆F₅BF₂, 1,4-C₆F₄(BF₂)₂ with IF₇ gave exclusively the corresponding ring fluorination products, perfluorinated cyclohexadiene and cyclohexene derivatives, whereas [NMe₄][C₆F₅SiF₄] and IF₇ formed mixtures of C₆F_nIF₄ and C₆F_nH compounds (n = 7 and 9). CF₃CH₂IF₄ was not reactive towards the fluoro-oxidizer IF₇, whereas C₆F₅IF₄ formed C₆F_nIF₄ compounds (n = 7 and 9). C₆F₅IF₄ and CF₃CH₂IF₄ were inert towards [O₂][SbF₆] in anhydrous HF. CF₃CH₂IF₄ underwent C-H fluorination and C-I bond cleavage when treated with K₂[NiF₆]/KF in HF. The fluorine addition property of IF₇ was independently demonstrated in case of perfluorohexenes. C₄F₉CF=CF₂ and IF₇ underwent oxidative fluorine addition at -30 °C, and the isomers (CF₃)₂CFCF=CFCF₃ (cis and trans) formed very slowly perfluoroisohexanes even at 25 °C. The compatibility of IF₇ and selected organic solvents was investigated. The polyfluoroalkanes CF₃CH₂CHF₂ (PFP), CF₃CH₂CF₂CH₃ (PFB), and C₄F₉Br are inert towards iodine heptafluoride at 25 °C while CF₃CH₂Br was slowly converted to CF₃CH₂F. Especially PFP and PFB are new suitable organic solvents for IF₇.

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 C9H9F5Si, Product Details of C9H9F5Si.

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

Shmakov, Mikhail M. published the artcilePreparation of heptafluoronaphthyllithiums and -magnesiums: An unexpected difference in the reactivity of isomers C₁₀F₇H and C₁₀F₇Br towards organolithium and organomagnesium compounds, SDS of cas: 1206-46-8, the publication is Journal of Organometallic Chemistry (2019), 120889, database is CAplus.

Significant differences in the reactivity of isomeric heptafluoronaphthalenes and bromoheptafluoronaphthalenes towards organolithium and organomagnesium compounds were found. Metalation of polyfluorinated naphthalenes 2-C₁₀F₇X (X = H, Br) occurs easily under the action of bases (BuLi, t-BuLi, LDA) as well as EtMgBr (X = Br) in ether. This fact was proven by ¹⁹F NMR spectroscopy and by trapping of 2-C₁₀F₇M (M = Li, MgBr, Mg(2-C₁₀F₇)) with electrophile ClSiMe₃. The interaction of 1-C₁₀F₇Br with BuLi or EtMgBr proceeds in a similar way. In contrast to 2-C₁₀F₇H, isomeric 1-C₁₀F₇H is the less acidic substrate and undergoes only the nucleophilic alkyldefluorination when combined with BuLi or t-BuLi.

Journal of Organometallic 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 C8H5F3N4, SDS of cas: 1206-46-8.

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

Giel, Marie-Claire published the artcileAminium cation-radical catalyzed selective hydration of (E)-aryl enynes, Application In Synthesis of 16909-09-4, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(57), 6991-6994, database is CAplus and MEDLINE.

The hydration of carbon-carbon triple bonds is an important and atom economic synthetic transformation. Herein, authors report a mild and selective method for the catalytic Markovnikov hydration of (E)-aryl enynes to the corresponding enones, mediated through the bench-stable aminium salt, tris(4-bromophenyl)ammoniumyl hexachloroantimonate (TBPA). The chemoselective and diastereoselective method proceeds under neutral metal-free conditions, delivering excellent product yields from terminal and internal alkyne units. The synthesis of biol. important (E)-3-styrylisocoumarins, including a formal synthesis of the natural product achlisocoumarin III, demonstrates the utility of this novel transformation.

Chemical Communications (Cambridge, United Kingdom) published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Application In Synthesis of 16909-09-4.

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

Mori, Ichiro published the artcileStereoselective additions of nucleophilic alkenes to chiral thionium ions, Formula: C15H24S, the publication is Journal of Organic Chemistry (1990), 55(24), 5966-77, database is CAplus.

A convenient one-pot process has been developed for conversion of an aldehyde to an arylthionium ion which can be trapped by a nucleophilic alkene. The stereochem. of the reactions of such chiral and prochiral arylthionium ions with achiral and prochiral nucleophilic alkenes has been studied. The major adducts are those predicted by qual. application of the Cram-Felkin rule. Quant., however, the nature of the thionium aryl group has a marked effect. In reactions between prochiral thionium ions and prochiral enol silanes, good simple (anti) relative stereochem. is observed, especially with enol silane I. Mesitylthionium ions of α-chiral aldehydes react with prochiral enol silanes to give one of the four possible products in predominance. Again, however, enol silane I is found to be a superior reagent, giving II in 97% stereoisomeric purity. The α-methyl-β-arylthio ketones produced in these thionium ion reactions can be transformed by a straightforward process, which includes desulfurization, into chain compounds having anti 1,3-di-Me branches. An iterative application of this scheme can be used to prepare deoxypolypropionate structures.

Journal of Organic Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Formula: C15H24S.

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

Jones, Mark M. published the artcileChelate antidotes for acute nickel(II) intoxication, COA of Formula: C6H20Cl2N4, the publication is Journal of Inorganic and Nuclear Chemistry (1981), 43(7), 1705-10, database is CAplus.

Of 27 chelating agents tested, 13 were excellent antidotes for acute Ni acetate poisoning when given i.p. to mice at 10 times the Ni dose. Log K_NiX/K_CaX ratios for the effective compounds ranged from 3 to 10. Na diethyldithiocarbamate [148-18-5], effective against Ni carbonyl intoxication, was not effective against Ni(II) poisoning. A donor atom appeared essential for activity, with N and O being more effective than S. Zn diethylenetriaminepentaacetate [65229-17-6] was not effective, despite its favorable transformation stability constant, possibly due to its slow rate of transformation.

Journal of Inorganic and Nuclear Chemistry 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 C6H20Cl2N4, COA of Formula: C6H20Cl2N4.

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