Catalysis-chemistry

Xia, Mingjin published the artcileCatalytic upgrading of ex-situ heavy coal tar over modified activated carbon, HPLC of Formula: 191-07-1, the publication is Fuel (2022), 122912, database is CAplus.

Com. activated carbon (AC) was modified by steam activation (ST) and chem. activation (AT), and their catalytic upgrading of ex-situ heavy coal tar was investigated. The results show that both AT and ST methods could significantly increase the total surface area, promote the formation of mesopores, and further improve the catalytic upgrading performances. The light tar content was increased to 90.5% over AC-0.25ST and 85.0% over AC-2AT, resp. The specific textural properties of AC exerted an obvious effect on the resultant tar quality, and a good linear relationship between light tar content and mesoporous surface area of AC was first revealed. The removal of minerals in AC is unbeneficial to the tar upgrading, suggesting that the minerals play a catalytic role. The modified ACs could obviously increase the contents of light oil and naphthalene oil, and the pitch content was declined to 9.5% over AC-0.25ST. H₂ and CH₄ yields were also remarkably increased during tar upgrading. The resultant ACs exhibited good selectivity to benzenes and naphthalenes during tar upgrading, along with a decrease in aliphatic compounds and more than 3-ring polycyclic aromatic hydrocarbons (PAHs), and 50.3% and 47.2% naphthalenes were acquired over the AC-0.25ST and AC-2AT, resp. This study is expected to guide the preparation of upgrading catalysts and the products regulation during the catalytic upgrading of heavy coal tar.

Fuel published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C3H12Cl2N2, HPLC of Formula: 191-07-1.

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

Xu, Guanghui published the artcileStudy on process for producing ¦Á-trifluoromethyl ethylamine, COA of Formula: C3H6F3N, the publication is Guangdong Huagong (2012), 39(1), 194-195, database is CAplus.

¦Á-Trifluoromethyl ethylamine was prepared under pressure by using L-alanine and sulfur tetrafluoride as raw materials for one step fluorination reaction. The optimal operating conditions for the process were investigated exptl. These conditions obtained are as follows: 100 g of L-alanine as raw material and molar ratio of sulfur tetrafluoride to L-alanine at 1: 2, the reaction at temperature of 55¡ãC and pressure of 18 ? 19 kgf/cm² for 12 h. The yield of the product is above 55% and the m.p. of the hydrochloride of the product is above 218.5¡ãC.

Guangdong Huagong published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C25H21N3O4, COA of Formula: C3H6F3N.

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

Wang, Xiaochen published the artcileCombined Photoredox and Carbene Catalysis for the Synthesis of ¦Á-Amino Ketones from Carboxylic Acids, Application In Synthesis of 118-90-1, the publication is ACS Catalysis (2022), 12(4), 2522-2531, database is CAplus.

Herein, a mild, operationally simple method for direct acylation of ¦Á-amino C(sp³)-H bonds from carboxylic acids RC(O)OH (R = cyclopropyl, Ph, 2-chlorophenyl, etc.) via the merger of carbene and photoredox catalysis was reported. Specifically, cross-coupling reactions between a wide range of carboxylic acids, a class of feedstock chems., and readily available N-alkyl anilines R¹CH₂N(R²)R³ (R¹ = H; R² = Me; R¹R² = -(CH₂)₃-, -(CH₂OCH₂CH₂)-; R³ = Ph, 4-bromophenyl, pyridin-2-yl, etc.) and 1-phenyl-2,3-dihydro-1H-indole by means of single-electron N-heterocyclic carbene catalysis combined with photocatalysis provided access to structurally diverse ¦Á-amino ketones RC(O)CH(R¹)N(R²)R³ and (1-phenylindolin-2-yl)(p-tolyl)methanone. The method features a broad substrate scope and is compatible with a wide array of functional groups. To demonstrate the potential applications of the method, one of the ¦Á-amino ketone products was subjected to further transformations.

ACS 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 C13H10O2, Application In Synthesis of 118-90-1.

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

Yan, Zhuo published the artcileOne-pot fabrication of superhydrophilic/underwater superoleophobic membrane based on mussel-inspired chemistry for high-efficiency oil-water separation, Name: 3-(Trimethoxysilyl)propan-1-amine, the publication is Nano (2022), 17(5), 2250039, database is CAplus.

Membrane separation technol. is attracting a broad spectrum of attention because of its low energy consumption and superior availability in oily wastewater treatment. Poly(vinylidene fluoride) (PVDF) membranes play an important role in membrane separation field. Herein, a kind of superhydrophilic/underwater superoleophobic nanoparticles modified PVDF membrane based on mussel-inspired chem. was prepared via a one-pot method. This method applied the Michael addition/Schiff base reactions between dopamine (DA) and alkoxy hydrolysis of (3-Aminopropyl) trimethoxysilane (APTMS). The water contact angle (WCA) decreased from 117¡ã to 12.6¡ã after the modification. The resultant superhydrophilic/underwater superoleophobic membrane exhibited the outstanding water flux (12280.4L m^-2 h^-1 bar^-1), which was a sixfold increment compared to Pristine PVDF. Besides, the resultant membranes showed the effective separation of various oil-water emulsions ( > 98%), and a high recoverability in multiple-iterations presented the membrane possessing the performance of persistent separation With the simplicity of one-pot method preparation, outstanding performance, and environmental friendliness, this work provided a potential strategy to large-scale modified membrane materials for the treatment of oily wastewater.

Nano published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C13H11NO, Name: 3-(Trimethoxysilyl)propan-1-amine.

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

Sheng, Xijun published the artcileSynthesis and Biological Activity of 4-[(Substituted Phenoxyacetoxy)methyl]-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane-1-one, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Journal of Heterocyclic Chemistry (2017), 54(1), 165-170, database is CAplus.

A series of novel 4-[(substituted phenoxyacetoxy)methyl]-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane-1-one were synthesized. Their structures were confirmed by IR, ¹H NMR, mass spectroscopy, and elemental analyses. The results of preliminary bioassays show that some of the title compounds exhibit moderate to good herbicidal and fungicidal activities. For example, some title compounds possess 90-100% inhibition against the growth of roots of both rape and barnyard grass at 10 mg/L. Moreover, some of the title compounds possess 75-89% inhibition against Botrytis cinerea at the concentration of 50 mg/L.

Journal of Heterocyclic Chemistry 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 C10H11NO4, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Liao, Yang published the artcileIntramolecular Oxidative Coupling between Unactivated Aliphatic C-H and Aryl C-H Bonds, Application In Synthesis of 1949-41-3, the publication is Organic Letters (2021), 23(4), 1251-1257, database is CAplus and MEDLINE.

In this article, a Pd-catalyzed intramol. oxidative coupling between unactivated aliphatic and aryl C-H compounds ROCH₂C(CH₃)₂CO₂H (R = C₆H₅, 4-ClC₆H₄, 2-naphthyl, etc.) has been described. This chem. showed great potential to build up fused cyclic scaffolds I (R¹ = H, Me, OMe; R² = Me, Ph, F, etc.; R³ = H, Me; R⁴ = H, Me; R¹R² = R³R⁴ = -CH=CHCH=CH-) and 3-methyl-3,4-dihydro-2H-benzofuro[2,3-h]chromene-3-carboxylic acid from linear substrates through oxidative couplings. Privileged chromane and tetralin scaffolds were constructed from readily available linear starting materials in the absence of any organohalides and organometallic partners.

Organic Letters 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, Application In Synthesis of 1949-41-3.

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

Wu, Jiaxin published the artcileSolubility Modeling, Solvent Effect, and Dissolution Properties of 4-Nitrophenylacetic Acid in Thirteen Solvents Ranging from 283.15 to 328.15 K, COA of Formula: C8H7NO4, the publication is Journal of Chemical & Engineering Data (2020), 65(5), 2894-2902, database is CAplus.

Solubility of 4-nitrophenylacetic acid in 13 neat solvents of n-propanol, methanol, ethylene glycol (EG), ethanol, isopropanol, cyclohexane, acetonitrile, N,N-DMF (DMF), N,N-dimethylacetylammonia (DMA), n-butanol, Et acetate, water, and isobutanol was exptl. attained by the use of a shake-flask method ranging from 283.15 to 328.15 K at ambient pressure of p = 101.2 kPa. The solubility of 4-nitrophenylacetic acid (mole fraction) increased as the studied temperature increased and presented the subsequence in the studied solvents: DMF > methanol > DMA > ethanol > n-propanol > n-butanol > Et acetate > isopropanol > isobutanol > acetonitrile > EG > water > cyclohexane. The interactions of solvent-solvent and solvent-solute mols. were inspected through linear solvation energy relationships. Results showed that the dipolarity/polarizability and Hildebrand solubility parameter of solvents greatly affected the 4-nitrophenylacetic acid solubility The determined solubility was math. correlated by the NRTL model, ¦Ëh equation, Apelblat equation, and Wilson model. The maximum values of root-mean-square deviations and relative average deviations were 57.52 x 10^-4 and 4.22 x 10^-2, resp. The values of relative average deviation were lower via the Apelblat equation than via the other model/equations for a certain neat solvent. As well, the dissolution properties, reduced excess enthalpy, and activity coefficient at infinitesimal concentration were derived according to the Wilson model. The obtained solubility data and thermodn. relationships were of crucial importance for the purification of 4-nitrophenylacetic acid isomers.

Journal of Chemical & Engineering Data published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C18H20N2O12, COA of Formula: C8H7NO4.

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

Wang, Ying published the artcileChiral Fluorescent Metal-Organic Framework with a Pentanuclear Copper Cluster as an Efficient Luminescent Probe for Dy³⁺ Ion and Cyano Compounds, Application In Synthesis of 613-33-2, the publication is Inorganic Chemistry (2021), 60(20), 15085-15090, database is CAplus and MEDLINE.

Luminescent probes were used for detecting various heavy metals and toxic compounds Novel sensor with excellent sensitivity and selectivity is highly demanding. Herein, the authors designed and synthesized a three-dimensional (3D) Cu-organic framework [[Cu₅(TMDP)₃Cl](ClO₄)₄]_n (1) [TMDP = 4,4′-di(4H-1,2,4-triazol-4-yl)methylbiphenyl] of pcu ¦Á-Po primitive cubic topol. with Schlafli symbol of {4.4.4.4.4.4.4.4.4.4.4.4.^*.^*.^*}. By taking advantage of metal clusters and triazole ligand as the MOF components, the newly obtained MOF is stable in various environments and can be potentially used as the sensor. Remarkably, this MOF-based sensor shows high sensitivity and selectivity toward Dy ion (Dy³⁺) in a multiple lanthanides mixed solution Besides, it exhibits luminescent quenching toward various cyano compounds This chiral cluster-based network provides a potential luminescent probe for various inorganic and organic compounds with high sensitivity and selectivity.

Inorganic Chemistry published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C9H9BrO2, Application In Synthesis of 613-33-2.

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

Xu, Tianhao published the artcileNickel-Catalyzed Decarbonylative Thioetherification of Carboxylic Acids with Thiols, Recommanded Product: 2-Methylbenzoic acid, the publication is Journal of Organic Chemistry (2022), 87(13), 8672-8684, database is CAplus and MEDLINE.

A nickel-catalyzed decarbonylative thioetherification of carboxylic acids RC(O)OH (R = naphthalen-2-yl, 1-benzofuran-2-yl, 1-benzothiophen-2-yl, etc.) with thiols R¹HS (R¹ = 4-methylphenyl, naphthalen-2-yl, 2-methylfuran-3-yl, etc.) was developed. Under the reaction conditions, benzoic acids, cinnamic acids, and benzyl carboxylic acids coupled with various thiols including both aromatic and aliphatic ones produce the corresponding thioethers RSR¹ in up to 99% yields. Moreover, this reaction was applicable to the modification of bioactive mols. such as 3-methylflavone-8-carboxylic acid, probenecid, and flufenamic acid, and the synthesis of acaricide chlorbenside. These results well demonstrated the potential synthetic value of this new reaction in organic synthesis.

Journal of Organic Chemistry 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 C8H14O2, Recommanded Product: 2-Methylbenzoic acid.

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

Yi, Ji-Tao published the artcileCopper-catalyzed direct decarboxylative fluorosulfonylation of aliphatic carboxylic acids, Category: catalysis-chemistry, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(67), 9409-9412, database is CAplus and MEDLINE.

Two efficient and complementary methods for direct decarboxylative fluorosulfonylation of carboxylic acids by the merging of copper catalysis with different N-centered HAT regents were reported. A wide range of structurally diverse sulfonyl fluorides was readily accessed from primary, secondary, and tertiary carboxylic acids in a single step under mild conditions.

Chemical Communications (Cambridge, United Kingdom) 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 C2H3N3, Category: catalysis-chemistry.

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