Catalysis-chemistry

Wu, Hongguo published the artcileHot water-promoted catalyst-free reductive cycloamination of (bio-)keto acids with HCOONH₄ toward cyclic amides, Formula: C10H10O3, the publication is Journal of Supercritical Fluids (2020), 104698, database is CAplus.

HCOONH₄ was demonstrated to be capable of acting as both hydrogen and nitrogen source in the absence of any catalyst and additive for the reductive cycloamination of bio-based levulinic acid (LA) to 5-methyl-2-pyrrolidone (MPL) with more than 90% in just 60 min at 180¡ã. Pressurized hot water remarkably enabled the reaction efficiency and rate by promoting the hydrolysis of HCOONH₄ to liberated ammonia and formic acid for the cascade reactions and this catalyst-free protocol was also applicable to the efficient synthesis of various cyclic amides from relevant keto acids. Moreover, the reaction pathways were investigated by conducting deuterium-labeling experiments and kinetic studies of selected reactions.

Journal of Supercritical Fluids published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C16H19BO3, Formula: C10H10O3.

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

He, Xingrui published the artcileFinding new elicitors that induce resistance in rice to the white-backed planthopper Sogatella furcifera, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2015), 25(23), 5601-5603, database is CAplus and MEDLINE.

Herein we report a new way to identify chem. elicitors that induce resistance in rice to herbivores. Using this method, by quantifying the induction of chems. for GUS activity in a specific screening system that we established previously, 5 candidate elicitors were selected from the 29 designed and synthesized phenoxyalkanoic acid derivatives Bioassays confirmed that these candidate elicitors could induce plant defense and then repel feeding of white-backed planthopper Sogatella furcifera.

Bioorganic & Medicinal Chemistry Letters 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, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Shu, Xin published the artcileDirect synthesis of Fe(III) immobilized Zr-based metal-organic framework for aerobic oxidation reaction, Quality Control of 457-68-1, the publication is Applied Organometallic Chemistry (2017), 31(12), n/a, database is CAplus.

A Zr-based metal-organic framework with bipyridine units (UiO-67) I has been utilized for the immobilization of catalytically active iron species via a post-synthetic metalation method. UiO-67 bipyridine MOF I was synthesized through a simple solvothermal method and was shown to have a UiO-type structure. Post-synthetic metalation of UiO-67 MOF I was performed for the immobilization of the catalytically active FeCl₃. FT-IR and EDX element map suggested that FeCl₃ is coordinately bonded to the UiO-67 bipyridine framework. The synthesized UiO-67-FeCl₃?II catalyst was used for the aerobic oxidation of alcs. such as 4-methoxybenzyl alc., 1,2,3,4-tetrahydronaphthalen-1-ol, thiophen-2-ylmethanol, etc. and benzylic compounds such as ethylbenzene, 9H-fluorene and (4-fluorophenyl)methane in the presence of mol. oxygen. In addition, the UiO-67-FeCl₃?II catalyst can be reused as a solid heterogeneous catalyst without compromising its activity and selectivity.

Applied Organometallic Chemistry published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C19H14Cl2, Quality Control of 457-68-1.

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

Cheng, Xiu-Fen published the artcilePalladium(II)-Catalyzed C(sp²)-H Bond Activation/C-N Bond Cleavage Annulation of N-Methoxy Amides and Arynes, Application In Synthesis of 104-03-0, the publication is Organic Letters (2022), 24(11), 2087-2092, database is CAplus and MEDLINE.

The Pd(II)-catalyzed C-H bond activation/C-N bond cleavage annulation reaction of N-alkyoxyamide aryne was developed to synthesize 9,10-dihydrophenanthrenone derivatives I [R¹ = H, 3-Me, 2-MeO, etc.; R² = Me, n-Pr, i-Pr, n-Bu, Ph, cyclohexyl; R³ = Me, n-Bu, Ph; R⁴ = H, 7-F, 6,7-di-MeO, etc.; R²R³ = (CH₂)₄, (CH₂)₅, (CH₂)₂O(CH₂)₂]. This reaction exhibited good functional group compatibility with yields up to 92%. Detailed mechanistic studies showed that the key to C-N bond cleavage was the formed eight-membered palladacycle intermediate undergoing nucleophilic addition to the carbonyl group, which provided a new and practical way for N-alkoxyamide directed C-H bond activation.

Organic Letters 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 C8H7NO4, Application In Synthesis of 104-03-0.

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

Hong, Chao published the artcileRh-Catalyzed Coupling of Acrylic/Benzoic Acids with ¦Á-Diazocarbonyl Compounds: An Alternative Route for ¦Á-Pyrones and Isocoumarins, Formula: C8H8O2, the publication is Organic Letters (2022), 24(3), 815-820, database is CAplus and MEDLINE.

A coupling of acrylic acids/benzoic acids with ¦Á-diazocarbonyl compounds had been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)₂ additive. The presence of Zn(OAc)₂ obviously accelerates the C(sp²)-H activation and destructed the formation of carboxylic ester that was formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of ¦Á-pyrones I [R¹ = Me, Ph, Bn, etc.; R² = H, Me, Ph; R¹R² = (CH₂)₄; R³ = Me, Et, allyl, t-Bu, R⁴ = Me, Et, Ph, etc.] and isocoumarins II [R = H, 8-Me, 8-Me-6-MeO, etc.] without the transformation of carboxylic acids to the corresponding amides.

Organic Letters 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, Formula: C8H8O2.

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

Xia, Yuehan published the artcileDiscovery of tetrahydroquinolines and benzomorpholines as novel potent ROR¦Ãt agonists, Computed Properties of 104-03-0, the publication is European Journal of Medicinal Chemistry (2021), 113013, database is CAplus and MEDLINE.

The retinoic acid receptor-related orphan receptor ¦Ãt (ROR¦Ãt) is an important nuclear receptor that regulates the differentiation of Th17 cells and production of interleukin 17(IL-17). ROR¦Ãt agonists increase basal activity of ROR¦Ãt and could provide a potential approach to cancer immunotherapy. Herein, hit compound I was identified as a weak ROR¦Ãt agonist during inhouse library screening. Changes in LHS core of I led to the identification of tetrahydroquinoline compound II as a partial ROR¦Ãt agonist (maximum act. = 39.3%). Detailed structure-activity relationship on substituent of the LHS core, amide linker and RHS arylsulfonyl moiety was explored and a novel series of tetrahydroquinolines and benzomorpholines was discovered as potent ROR¦Ãt agonists. Tetrahydroquinoline compound III (EC₅₀ = 8.9 ¡À 0.4 nM, maximum act. = 104.5%) and benzomorpholine compound IV (EC₅₀ = 7.5 ¡À 0.6 nM, maximum act. = 105.8%) were representative compounds with high ROR¦Ãt agonistic activity in dual FRET assay, and they showed good activity in cell-based Gal4 reporter gene assay and Th17 cell differentiation assay (104.5% activation at 300 nM of III; 59.4% activation at 300 nM of IV). The binding modes of III and IV as well as the two ROR¦Ãt inverse agonists accidentally discovered were also discussed.

European Journal of Medicinal Chemistry 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 C6H9N3O2S, Computed Properties of 104-03-0.

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

Guo, Ying published the artcilePalladium-Catalyzed Divergent Regioselective Homocoupling and Hydroxylation of 3-Arylbenzo[d]isoxazoles, Product Details of C3H4F2O2, the publication is Advanced Synthesis & Catalysis (2017), 359(3), 410-418, database is CAplus.

Palladium-catalyzed oxidative homocoupling and hydroxylation of 3-arylbenzo[d]isoxazoles was developed via direct C(sp²)-H bond activation using benzoisoxazoles as a new directing group. The protocols offered a divergent approach to functionalized, synthetically useful benzoisoxazoles in good yields. Critically, 1-iodo-4-methoxybenzene functioned as an oxidant to mediate the dehydrogenative homocoupling and minimize the cross-coupling. A dual-core dimeric palladacycle intermediate was confirmed by X-ray crystallog., and served as an active catalytic species in the catalytic cycles.

Advanced Synthesis & Catalysis published new progress about 155142-69-1. 155142-69-1 belongs to catalysis-chemistry, auxiliary class Difluoromethyl,Fluoride,Carboxylic acid,Aliphatic hydrocarbon chain, name is 3,3-Difluoropropanoic acid, and the molecular formula is C3H4F2O2, Product Details of C3H4F2O2.

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

Chae, Weon-Sik published the artcileBimodal porous gold opals for molecular sensing, Recommanded Product: 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, the publication is Electronic Materials Letters (2013), 9(6), 783-786, database is CAplus.

We have fabricated bimodal porous gold skeletons by double-templating routes using poly(styrene) colloidal opals as templates. The fabricated gold skeletons show a bimodal pore-size distribution, with small pores within spheres and large pores between spheres. The templated bimodal porous gold skeletons were applied in Raman scattering experiments to study sensing efficiency for probe mols. We found that the bimodal porous gold skeletons showed obvious enhancement of Raman scattering signals vs. that of the unimodal porous gold which only has interstitial pores of several hundred nanometers.

Electronic Materials Letters published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Recommanded Product: 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate.

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

Zhai, Wentao published the artcileStable fouling resistance of polyethylene (PE) separator membrane via oxygen plasma plus zwitterion grafting, Related Products of catalysis-chemistry, the publication is Separation and Purification Technology (2022), 121091, database is CAplus.

Low-cost and fouling resistant microfiltration/ultrafiltration membranes for wastewater treatment has been a challenging task when balancing the membrane cost and performance stability. Herein, a low-cost polyethylene (PE) lithium-ion battery separator was explored as a potential solution To tackle the intrinsic hydrophobic character which incurs severe fouling, a novel cascade process of plasma treatment plus zwitterion grafting was designed: first oxygen plasma to endow oxygen-containing groups for hydrophilicity and supply “grafting sites”, and grafting zwitterion 3-[[3-(trimethoxysilane)-propyl] amino] propane-1-sulfonic acid (TMAPS) for robust fouling resistance. The membranes were analyzed by water contact angle, Fourier-transform IR Spectroscopy (FTIR), Energy Dispersive Spectroscopy (EDS), and XPS. Challenged by two typical foulants, e.g., humic acid (HA) and bovine serum albumin (BSA), the zwitterion grafted membrane showed the best antifouling performance. Oxygen plasma treated PE membrane presented a better performance towards HA than to BSA. The Resistance-in-Series model revealed that the plasma-treated membrane showed improvement in reversible resistance but not in irreversible resistance. Migration of hydrophobic PE segment to the surface due to the low glass transition temperature was attributed to the low fouling resistance of the plasma-treated membrane. However, the zwitterion-grafted membrane led to stabilized hydrophilicity and inhibited the hdrophobic-hydrophobic interaction between the membrane and foulant, thus resulting to significantly improved flux recovery and low irreversible fouling rate. This study clarified that oxygen plasma alone is not sufficient to provide sufficient fouling resistance, but grafting with zwitterion provides stable hydrophilicity and fouling resistance.

Separation and Purification Technology 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 C14H20BNO3, Related Products of catalysis-chemistry.

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

Teong, Siew Ping published the artcileCopper catalysed alkynylation of tertiary amines with CaC₂ via sp³ C-H activation, Quality Control of 2909-77-5, the publication is Green Chemistry (2016), 18(12), 3499-3502, database is CAplus.

A mild and easy-to-handle protocol to produce propargylamines with a terminal alkyne through catalytic cross-coupling of tertiary amines and calcium carbide was developed. The reaction proceeds via sp³ C-H bond activation and C-C coupling. Good to excellent yields were obtained for the corresponding propargylamines with both alkyl and aryl substitutions. The development of these functionalized propargylamines with a terminal alkyne group will offer a wider application for the synthesis of natural or pharmaceutical products due to their unique sp C-H reactivity.

Green Chemistry published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C9H5ClO2, Quality Control of 2909-77-5.

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