Month: November 2022

Sadakiyo, Masaaki published the artcileDesign and Synthesis of Hydroxide Ion-Conductive Metal-Organic Frameworks Based on Salt Inclusion, SDS of cas: 17351-62-1, the publication is Journal of the American Chemical Society (2014), 136(5), 1702-1705, database is CAplus and MEDLINE.

The authors demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alk.-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. Tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Also, ZIF-8 including the salt exhibited a capacity for OH^– ion exchange, implying that freely exchangeable OH^– ions are present in the MOF. ZIF-8 containing OH^– ions showed an ionic conductivity of 2.3 ¡Á 10^-8 S cm^-1 at 25¡ã, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.

Journal of the American Chemical Society published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, SDS of cas: 17351-62-1.

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

Gurumurthy, R. published the artcileRuthenium(III)-catalyzed oxidation of phenoxyacetic acids by aqueous phenyliodoso acetate, Formula: C12H16O3, the publication is Oxidation Communications (1993), 16(3-4), 351-7, database is CAplus.

The kinetics of oxidation of phenoxyacetic acid and its derivatives (19 compounds) by phenyliodoso acetate has been studied in 60% (volume/volume) aqueous acetic acid. The reaction is first order with respect to both phenoxyacetic acid and phenyliodoso acetate and is catalyzed by hydrogen ions. Catalysis by Ru(III) is observed A Hammett ¦Ñ value of -2.62 at 35¡ã indicates an electron-deficient transition state. The oxidation rates of ortho-substituted compounds have been analyzed by applying Taft’s steric energy parameters. A suitable mechanism has been proposed.

Oxidation Communications published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Formula: C12H16O3.

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

Elango, K. P. published the artcileKinetics and mechanism of oxidation of phenoxyacetic acids by periodate complex of Cu(III), Formula: C12H16O3, the publication is Oxidation Communications (1996), 19(1), 44-9, database is CAplus.

The kinetics of oxidation of phenoxyacetic acid by copper(III)-periodate complex have been studied in aqueous alk. medium. The reaction is first order with respect to phenoxyacetic acid and copper(III). The rate dependence on [NaOH] is unity. The rates of oxidation of a number of para- and meta-substituted phenoxyacetic acids were correlated with Hammett substituent constants On the basis of the kinetic studies, a mechanism has been proposed.

Oxidation Communications published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Formula: C12H16O3.

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

Stepanov, B. I. published the artcileSynthesis of trimesitylphosphine and tetramesityldiphosphine, Name: Dimesitylphosphine oxide, the publication is Zhurnal Obshchei Khimii (1969), 39(7), 1544-9, database is CAplus.

To RMgBr from 15.92 g. bromomesitylene was added 1.8 ml. PCl3 in tetrahydrofuran (THF) and the mixture refluxed 2 hrs. and worked up to give 29% trimesitylphosphine (I), m. 192-3¡ã, isolated through its HCl salt. The filtrate from the latter gave on evaporation dimesitylphosphine oxide (II), 6%, m. 132-40¡ã. Refluxing 15 g. bromomesitylene, 8 g. Na, and 2.22 ml. PCl3 in C6H6 80 hrs. gave 6% I. Heating I with MeI 6 hrs. gave the methiodide, decomposed 314-17¡ã, which with Na picrate in aqueous EtOH gave the corresponding picrate, m. 183.5-84¡ã. I and 20% H2O2 in Me2CO gave trimesitylphosphine oxide, m. 210-10.5¡ã. II and H2O2 in MeCOEt refluxed 4 hrs. gave dimesitylphosphinic acid, m. 208-9¡ã, also formed by heating II 1 hr. at 150¡ã and extracting with aqueous NaHCO3, then acidifying the extract RMgBr from 9.95 g. bromomesitylene treated in THF with 1.8 ml. PCl3 and heated 2 hrs. gave after an aqueous treatment (NH4Cl) 33% tetramesityldiphosphine (III), decomposed 200-15¡ã, while the filtrate gave 5% I; use of PBr3 gave the same result, while inverted order of mixing gave 35% and 2.5% yields of these, resp. III monomethiodide m. 274-6¡ã; picrate m. 198.5-9.5¡ã. Treating 1.08 g. III with 3.52 ml. 20% H2O2 in Me2CO suspension and refluxing 4 hrs. gave on evaporation 80% III monoxide, m. 205-8¡ã; with a larger amount H2O2 the reaction gave II dioxide, m. 188-90¡ã. Ir and uv spectral curves are reported.

Zhurnal Obshchei Khimii published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C19H21N3O3S, Name: Dimesitylphosphine oxide.

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

Batenko, Nelli G. published the artcileA new method for the synthesis of 2,5-bisheteroaryl-3,6-dichloro-1,4-benzoquinones, Safety of 1,1-Dimethylthiourea, the publication is Heterocycles (2005), 65(7), 1569-1576, database is CAplus.

A new method for the synthesis of sym. and asym. 2,5-bisheteroaryl-3,6-dichloro-1,4-benzoquinones with sulfur and/or nitrogen containing heterocycles has been elaborated on the basis of easily obtainable benzofuran.

Heterocycles published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Safety of 1,1-Dimethylthiourea.

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

Kaur, Gurpreet published the artcileStudies on thermogravimetric analysis and solvophobic interactions of micellization of Pd (II) complex in non aqueous solvents, Category: catalysis-chemistry, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2013), 25-34, database is CAplus.

The present paper deals with the synthesis and characterization of a Pd (II) metal complex by means of various spectroscopic, thermogravimetric and physicochem. techniques. The Pd metal complex was found to be thermally stable with m.p. at 193 ¡ãC. Thermodn. decomposition parameters and activation energy were obtained using various methods. The micellization behavior of the complex was examined in different alcs. (n = 2-5) and at various temperatures Self assembly of synthesized metallosurfactant resulted in formation of inverted metallomicelles with cmc in range of 0.7-0.8 mM. Thermodynamically micellization process was found to be enthalpy driven. Dynamic redox electrochem. behavior changes from reversible to irreversible process with change of alc. as solvent for different micellar solution The size of Pd inverse’ metallomicelles was found to increase with increase in the hydrophobicity of the solvent. Moreover, the study also takes into account the role of metal ion in modifying the properties of a metallosurfactant.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects 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

Zahra Alizadeh, Seyedeh published the artcileFrom Deep Eutectic Solvents to Nitrogen-rich Ordered Mesoporous Carbons: A Powerful Host for the Immobilization of Palladium Nanoparticles in the Aerobic Oxidation of Alcohols, Formula: C8H8O2, the publication is ChemCatChem (2022), 14(8), e202101621, database is CAplus.

The preparation of a nitrogen-rich ordered mesoporous carbon (DNOMC) with three-dimensional cubic structure was established via carbonization of a green, inexpensive and safe deep eutectic solvent consisting of choline chloride salt and D-glucose in the presence of KIT-6 template for the first time. The materials were characterized by TEM, N₂ adsorption-desorption anal., XPS, TGA, CHN, and FT-IR. The DNOMC was shown to be a powerful support for the immobilization of palladium nanoparticles. The Pd@DNOMC catalyst exhibited high activity in the selective aerobic oxidation of various activated and non-activated primary and secondary benzylic as well as linear and cyclic aliphatic alcs. to the corresponding carboxylic acids RCOOH [R = hexyl, Ph, 4-MeC₆H₄, etc.] and ketones R¹C(O)R² [R¹ = Me, Ph; R² = Me, pentyl, hexyl; R¹R² = (CH₂)₆, (CH₂)₇] in pure water under mol. oxygen. The catalyst system could successfully be reused at least ten times without any significant decrease in either activity or selectivity. It was worth noting that, the hot filtration strongly showed that the catalyst worked in a boomerang-type catalyst pathway.

ChemCatChem published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is 0, Formula: C8H8O2.

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

Lupp, Amelie published the artcileA synopsis on different homologous series of fomocaine derivatives. In vitro interactions with the cytochrome P450 system, toxicity, and local anesthetic effects in rats., Application of 4-(Phenoxymethyl)benzoic acid, the publication is Arzneimittel Forschung (2007), 57(9), 562-567, database is CAplus.

Fomocaine (CAS 56583-43-6) is a basic ether-type local anesthetic used in dermatol. practice for surface anesthesia. For many years, modifications of the fomocaine mol. have been pursued, e.g. to improve its physicochem. properties and also in view of possible new (systemic) applications, e.g. in the treatment of migraine or as antiarrhythmic. The present paper provides a survey of the investigations undertaken with all the different series of fomocaine derivatives synthesized so far with respect to their in vitro interaction capacity at the cytochrome P 450 system, in vivo toxicity (LD₅₀; paresis of the N. ischiadicus) and local anesthetic effects (conduction anesthesia at the N. ischiadicus; surface anesthesia of the cornea) in rats. The main objective of this systematic comparison of the effects of all these substances was to assess possible basic structure-activity relationships.

Arzneimittel Forschung published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C14H12O3, Application of 4-(Phenoxymethyl)benzoic acid.

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

Pickel, Thomas C. published the artcileSynthesis of Previously Inaccessible Derivatives of 1,4,7-Tri-R-1,4,7-Triazacyclononane, Including Chiral Examples, and a Rapid Synthesis of the HCl Salts of H₃tacn and H₄dtne, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine, the publication is European Journal of Organic Chemistry (2018), 2018(48), 6876-6889, database is CAplus.

Unsym. triazacyclononanes with one or two tertiary alkyl nitrogen substituents, including nonracemic N-substituted triazacyclononanes, such as I and II, were prepared using the “crab-like” cyclization of N,N’-bis(chloroacetyl)ethanediamines with amines as the key step. Tert-butyl-substituted triazacyclononanes were deprotected with acid to yield triazacyclononane hydrochlorides, including the trihydrochloride of 1,4,7-triazacyclononane and a binucleating N-ethylene bridged derivative The structures of the copper(I) complexes of I and two other triazacyclononanes and the structure of II were determined by X-ray crystallog.

European Journal of Organic Chemistry 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

Nagy, Bence S. published the artcileN-Hydroxyphthalimide Catalyzed Aerobic Oxidation of Aldehydes under Continuous Flow Conditions, Synthetic Route of 118-90-1, the publication is Advanced Synthesis & Catalysis (2022), 364(12), 1998-2008, database is CAplus.

The efficacy of synthetic methodologies is based not only on potent chemistries but also on processing strategies that amplify reaction performance and overall safety. The N-hydroxyphtalimide-catalyzed aerobic oxidation of aldehydes is an environmentally reliable and inexpensive approach for the synthesis of valuable carboxylic acids. However, the reaction may lead to the accumulation of significant amounts of peracid in crude product mixtures thereby generating a considerable safety hazard. Also, in the case of deactivated substrates, long reaction times, high catalyst loading, and stoichiometric additives are required to promote oxidation Therefore, we developed a flow chem.-based process for N-hydroxyphtalimide-catalyzed aldehyde oxidations and exploited its benefits to minimize peracid buildup, thereby enhancing the process safety. By performing the aerobic oxidation of aldehydes under continuous flow conditions, chem. intensified and scalable carboxylic acid formation was obtained even in the reactions of deactivated substrates.

Advanced Synthesis & Catalysis published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Synthetic Route of 118-90-1.

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