Catalysis-chemistry

Zhang, Zeyu published the artcileExplant disinfection with chlorine dioxide promotes adventitious shoot organogenesis in Crassula portulacea via the regulation of reactive oxygen species and related gene expression, SDS of cas: 6972-05-0, the publication is Plant Cell, Tissue and Organ Culture (2021), 146(3), 531-540, database is CAplus.

Abiotic oxidative stress may activate plant organ development and growth. However, this effect is rarely reported for in vitro tissue culture. We report enhanced adventitious shoot formation in Crassula portulacea through the disinfection of explants with an environmentally safe oxidant chlorine dioxide (CD) and explore the involvement of reactive oxygen species (ROS) accumulation and the expression of organogenesis-associated genes. A concentration of 0.62-1.24 mM CD was effective at disinfecting C. portulacea explants within 15 min. Interestingly, the disinfection of explants with CD significantly promoted the formation of adventitious shoots, resulting in a 3-5-fold enhancement of the number of adventitious shoots when compared with the disinfection of explants using 0.1% mercuric chloride. Superoxide anions, hydrogen peroxide and superoxide dismutase increased in the CD treatment, while the enhancements were significantly suppressed when N,N’-dimethylthiourea (DMTU) was applied, indicating that CD-promoted adventitious shoot formation correlates with ROS accumulation. The expression of CpWUS, CpCYCB1 and CpCUC1 was upregulated in explants disinfected with CD, while the application of DMTU significantly suppressed their expression, consistent with adventitious shoot development. These findings present new insights into understanding the physiol. and mol. mechanisms of plant tissue culture and providing an efficient micropropagation protocol for C. portulacea.

Plant Cell, Tissue and Organ Culture 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 C13H9FO2, SDS of cas: 6972-05-0.

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

Zhang, Dejiang published the artcileNickel- and Palladium-Catalyzed Cross-Coupling of Stibines with Organic Halides: Site-Selective Sequential Reactions with Polyhalogenated Arenes, Computed Properties of 613-33-2, the publication is ACS Catalysis (2022), 12(2), 854-867, database is CAplus.

Herein, the authors disclose a general and efficient method for the synthesis of Sb-aryl and Sb-alkyl stibines by the Ni-catalyzed cross-coupling of halostibines with organic halides. The synthesized Sb-aryl stibines couple with aryl halides to give biaryls efficiently via Pd catalysis. Sequential reactions of stibines with polyhalogenated arenes bearing active C-I/C-Br sites and inactive C-Cl sites successfully proceeded, giving a variety of complex mols. with good site selectivity. Drugs such as diflunisal and fenbufen, as well as a fenofibrate derivative, were synthesized on gram scales in good yields, together with the high recovery of chlorostibine. Also, catalytic mechanisms are proposed based on the results of control experiments

ACS Catalysis 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 C9H12O, Computed Properties of 613-33-2.

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

Yu, Linhui published the artcileDisclosing the natures of carbon edges with gradient nanocarbons for electrochemical hydrogen peroxide production, Category: catalysis-chemistry, the publication is Matter (2022), 5(6), 1909-1923, database is CAplus.

Understanding the intrinsic nature of carbon edges toward the electrocatalytic reduction of O₂ to H₂O₂ is challenging due to the inevitable coexistence of edges and heteroatom groups. Herein, ten different gradient nanocarbons with well-defined edge topologies and sizes are used as models to investigate the explicit function of each common edge at a mol. level. We suggest that both armchair and zigzag configurations are pos. in H₂O₂ formation. Direct proportional structure-function relationships between the size/number/areas of edges and the activities are then proposed. Moreover, the dynamic evolution processes and kinetic behaviors of key intermediate products including O₂ (ads) and superoxide anion O₂^-* are monitored with time-resolved IR spectroscopy and simulation calculations Depending on different edge configurations, O₂ (ads) and O₂^-* species show a steep growth trend in the first 7.3 and 10 s and reach equilibrium until 10 and 13.3 s, resp. O₂ (ads) + e^– ¡ú O₂^-* as a possible rate-determining step (RDS) is evidenced by isotopic-labeling studies.

Matter 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 C6H8N2, Category: catalysis-chemistry.

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

Zhang, Guangji published the artcileCo,N-Codoped Porous Carbon-Supported Co_yZnS with Superior Activity for Nitroarene Hydrogenation, Synthetic Route of 104-03-0, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(15), 6118-6126, database is CAplus.

Preparation of chemoselective hydrogenation catalyst containing both CoNx and CoyZnS supported on N-doped porous carbon (CoN_x-Co_yZnS@NPC-Z) was reported. The CoN_x-Co_yZnS@NPC-Z catalyst were prepared by pyrolyzing the protein-metal-ion networks, followed by treatment with acid. The CoN_x-Co_yZnS@NPC-Z-3 catalyst delivered high catalytic activity and selectivity in chemoselective hydrogenation of nitroarenes afforded aryl amines R-NH₂ [R = Ph, 4-ClC₆H₄, 2-naphthyl, etc.] with almost full conversion and >98% selectivity in water/methanol mixture solvents at 90¡ãC under 5 bar of H₂ pressure for 3h of reaction. Also Schiff-base derivatives R¹CH=NR² [R¹ = Ph, 4-ClC₆H₄, 4-MeOC₆H₄, etc.; R² = Ph, 2-MeC₆H₄, 4-ClC₆H₄, etc.] were prepared via one-pot reductive amination of aryl aldehydes with aromatic nitro compounds using CoN_x-Co_yZnS@NPC-3 catalyst. Notably, the catalytic hydrogenation could work even under 1 bar of H₂ pressure and at room temperature with high conversion and selectivity. Besides, CoN_x-Co_yZnS@NPC-Z-3 exhibited remarkable tolerance to CO or H₂S poisoning and acid erosion.

ACS Sustainable Chemistry & Engineering 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 C6H13NO2, Synthetic Route of 104-03-0.

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

Huang, Lei published the artcileTuning the Electron Density of Metal Nickel via Interfacial Electron Transfer in Ni/MCM-41 for Efficient and Selective Catalytic Hydrogenation of Halogenated Nitroarenes, COA of Formula: C6H17NO3Si, the publication is ACS Sustainable Chemistry & Engineering (2022), 10(9), 2947-2959, database is CAplus.

Catalytic hydrogenation of nitrocompound is an environment-benign strategy for the production of important aniline intermediates. Herein, MCM-41 was synthesized from sepiolite via in situ self-assembled method and the modified MCM-41 supported nickel-based catalysts were prepared and applied in halogenated nitrobenzene hydrogenation to halogenated aniline. Compared with Ni/MCM-41, the Sn or La modified MCM-41 supported nickel-based catalysts exhibited better catalytic performance. The electron transfer from Sn or La species to Ni led to a downshift in d-band center of Ni, which was in favor of H desorption and hence promoted hydrogenation activity. It was found that chloronitrobenzene preferred the tilted adsorption orientation mode on the surface of Ni-Sn and Ni-La₂O₃ to flat adsorption orientation. Moreover the C-Cl bond scission on Ni-Sn and Ni-La₂O₃ were thermodynamically unfavorable in comparison with pure-phased Ni, leading to higher selectivity to chloroaniline. Ni/LaMCM-41-NH₂ gave the best catalytic performance of 100% conversion and 99.6% selectivity to m-chloroaniline.

ACS Sustainable Chemistry & Engineering 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 C6H17NO3Si, COA of Formula: C6H17NO3Si.

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

Deng, Yu published the artcileSemi-synthesis, antibacterial activity, and molecular docking study of novel pleuromutilin derivatives bearing cinnamic acids moieties, Application of (E)-3-(3-Nitrophenyl)acrylic acid, the publication is Archiv der Pharmazie (Weinheim, Germany) (2019), 352(1), n/a, database is CAplus and MEDLINE.

To develop new antibiotics owning a special mechanism, we used the mol. assembly method to synthesize a series of novel pleuromutilin derivatives containing a cinnamic acid scaffold at the C-14 side chain. We evaluated their antibacterial activity and used in silico mol. docking to study their binding mode with the target. The structure-activity relationship (SAR) study suggested that compounds with NO₂ (13e), OH (13u), and NH₂ (13y) appeared more active (0.0625-2 ¦Ìg/mL) in vitro against several penicillin-resistant Gram-pos. bacteria and the position of the substituent on the benzene ring would affect the activity. The in vivo efficacy investigation of 13e, 13u, and 13y with once daily intragastric (i.g.) administration at 40 mg/kg for 3 consecutive days in a mouse systemic infection model showed that 13u had equal activity as valnemulin providing the mice with 60% survival, while 13e and 13y gave 30 and 40% survival, resp. The mol. docking studies indicated that ¦Ð-¦Ð stacking and hydrogen bond formation played important roles in improving the antibacterial activity.

Archiv der Pharmazie (Weinheim, Germany) published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C9H7NO4, Application of (E)-3-(3-Nitrophenyl)acrylic acid.

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

Haraguchi, Ryosuke published the artcilePalladium-Catalyzed Formylation of Arylzinc Reagents with S-Phenyl Thioformate, Application In Synthesis of 77189-99-2, the publication is Organic Letters (2017), 19(7), 1646-1649, database is CAplus and MEDLINE.

In the presence of Pd(OAc)₂ and tri(2-furyl)phosphine in toluene/THF, arylzinc reagents derived from aryl iodides and an alkenylzinc reagent were chemoselectively formylated with S-Ph thioformate PhSCHO to yield aryl aldehydes ArCHO (Ar = 4-NCC₆H₄, 4-EtO₂CC₆H₄, 4-i-Pr₂NCOC₆H₄, 4-ClC₆H₄, 4-BrC₆H₄, 3-ClC₆H₄, 3-BrC₆H₄, 4-MeOC₆H₄, 1,3-benzodioxol-5-yl, 4-HOC₆H₄, 4-Me₂NC₆H₄, 2-MeC₆H₄, 2-MeOC₆H₄, 2,4,6-Me₃C₆H₂, 2-naphthyl, 1-naphthyl, 2-thienyl, 2-benzofuranyl, 1-Me-5-indolyl) and trans-cinnamaldehyde in 56-97% yields. Using deuterated and ¹³C-labeled deuterated and ¹³C-labeled S-Ph thioformate, 4-DCOC₆H₄CN and 4-BrC₆H₄¹³CH:CH₂ were prepared in high isotopic purities by this method.

Organic Letters published new progress about 77189-99-2. 77189-99-2 belongs to catalysis-chemistry, auxiliary class Thiophenol,Benzene,Ether, name is 2,4,6-Trimethoxybenzenethiol, and the molecular formula is C9H12O3S, Application In Synthesis of 77189-99-2.

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

Horii, Zenichi published the artcileItaconic acid in organic chemistry. I. Synthesis of 2-methyl-1,4-naphthoquinone (menadione), Category: catalysis-chemistry, the publication is Pharmaceutical Bulletin (1957), 82-4, database is CAplus and MEDLINE.

The easy availability of itaconic acid (I) led to its use in the synthesis of the title compound (II). The anhydride of I was converted by the Friedel-Crafts reaction with C₆H₆ and AlCl₃ to BzCH:CMeCO₂H (Dixon, et al., C.A. 44, 1516a), which (4 g.) refluxed 24 hrs. with amalgamated Zn (from 16 g. mossy Zn and 1.6 g. HgCl₂) in 14 cc. concentrated HCl, 6 cc. H₂O, 8 cc. PhMe, and 0.4 cc. AcOH, plus 4 cc. addnl. concentrated HCl each 6 hrs., cooled, the aqueous layer extracted with ether, and the extract distilled underwent the Clemmensen reduction to 1.7 g. Ph(CH₂)₂CHMeCO₂H (III), b₃ 138-40¡ã. III was also prepared by the catalytic hydrogenation of I to methylsuccinic acid according to D., et al. (loc. cit.), whose anhydride was converted to BzCH₂CHMeCO₂H, thence to III, and finally to 3,4-dihydro-2-methyl-1(2H)-naphthalenone (IV), all according to Alexander and Mudrak (C.A. 44, 10693i). IV (6 g.) in 60 cc. AcOH oxidized by 12 g. CrO₃ in 60 cc. 80% AcOH at such a rate as to keep the temperature below 20¡ã, the mixture kept 36 hrs. at room temperature, and poured into ice H₂O yielded 1.8 g. II, m. 104¡ã. Or, IV (14.7 g.) in 200 cc. ether treated gradually below 5¡ã with 16 g. Br, stirred 1.5 hrs., and worked up as usual yielded 17.5 g. 2-Br derivative of IV, m. 66¡ã, and this (1 g.) refluxed 30 min. with 2.5 g. 2,4,6-collidine yielded 0.5 g. 2-methyl-1-naphthol (V), m. 61¡ã. V (1 g.) in 10 cc. AcOH oxidized below 20¡ã by the gradual addition of 1.2 g. CrO₃ in 80% AcOH, kept 48 hrs., and poured into ice H₂O yielded 0.4 g. II. The structure of II was confirmed by reductive acetylation (Fieser, et al., C.A. 34, 413²) with AcONa, Zn dust, AcOH, and Ac₂O to 1,4,2-(AcO)₂C₁₀H₅Me, m. 112¡ã.

Pharmaceutical Bulletin 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, Category: catalysis-chemistry.

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

Futamura-Takahashi, Junko published the artcileStructure-based design, synthesis, and binding mode analysis of novel and potent chymase inhibitors, Name: O-Isobutylhydroxylamine hydrochloride, the publication is Bioorganic & Medicinal Chemistry Letters (2018), 28(2), 188-192, database is CAplus and MEDLINE.

Based on insight from the x-ray crystal structure of human chymase in complex with compound 1, a lactam carbonyl of the diazepane core was exchanged with O-substituted oxyimino group, leading to amidoxime derivatives This modification resulted in highly potent chymase inhibitors, such as O-phenylamidoxime I. X-ray crystal structure anal. indicated that compound I induced movement of the Leu99 and Tyr94 side chains at the S2 site, and the increase in inhibitory activity of O-Ph amidoxime derivatives suggested that the O-Ph moiety interacted with the Tyr94 residue. Surface plasmon resonance experiments showed that compound I had slower association and dissociation kinetics and the calculated residence time of compound I to human chymase was extended compared to that of amide compound 1.

Bioorganic & Medicinal Chemistry Letters published new progress about 6084-58-8. 6084-58-8 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is O-Isobutylhydroxylamine hydrochloride, and the molecular formula is C4H12ClNO, Name: O-Isobutylhydroxylamine hydrochloride.

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

Ohtaki, Hitoshi published the artcileIonic equilibriums in mixed solvents. VI. Dissociation constants of aliphatic diamines in water-methanol solutions, HPLC of Formula: 10517-44-9, the publication is Journal of Physical Chemistry (1971), 75(1), 90-2, database is CAplus.

Dissociation constant of protonated 1,2-diaminoethane, 1,3-diaminopropane, and 1,4-diaminobutane have been determined potentiometrically at 25¡ã in various H2O-MeOH mixtures containing 0.1M NaCl as an ionic medium. Ion products, Kw(S), in the mixtures have been calculated and used for calculations of pK’s of the acids, equilibrium of hydronium ions with alkoxonium ions being taken into consideration. Since values of pK2 – pK1 of the diamines have been independent of solvent compositions, interactions between charged sites in a mol. may scarcely be affected with the variation of the solvent composition

Journal of Physical Chemistry published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, HPLC of Formula: 10517-44-9.

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