Catalysis-chemistry

Zhao, Mingzhen published the artcilePreparation of Polyethylene Nanocomposites Based on Polyethylene Grafted Exfoliated ¦Á-Zirconium Phosphate, Computed Properties of 13822-56-5, the publication is Macromolecules (Washington, DC, United States) (2022), 55(8), 3039-3050, database is CAplus.

Polymer nanocomposites containing well-exfoliated nanoplatelets have been shown to possess greatly enhanced phys. and mech. properties. However, it is still a significant challenge to achieve adequate exfoliation of 2D nanoplatelets in polyolefin matrixes due to poor compatibility and associated entropic penalty between 2D inorganic filler and nonpolar polyolefin matrixes. Grafting polyolefin chains onto the surfaces of an already exfoliated nanoplatelet is a simple, yet effective solution to this problem. The grafted polyolefin chains on the nanoplatelets can entangle and cocrystallize with the polyolefin matrix, preventing agglomeration. In this study, polyethylene (PE) grafted ¦Á-zirconium phosphate (ZrP), ZrP-g-PE, was prepared and blended with the PE matrix. The graft d. of ZrP-g-PE was designed to maintain ZrP exfoliation during subsequent blending with the PE matrix. It was found that PE confined crystallization formed in ZrP-g-PE, resulting in the formation of PE crystal orientation perpendicular to the ZrP nanoplatelets. The usefulness of this study for preparation of high-performance polyolefin nanocomposites is discussed.

Macromolecules (Washington, DC, United States) 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 C8H5F3O3, Computed Properties of 13822-56-5.

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

Wang, Hai-su published the artcileQuality characteristics of black garlic with differet processing procedures, Recommanded Product: 1,1-Dimethylthiourea, the publication is Xiandai Shipin Keji (2014), 30(7), 230-236, 257, database is CAplus.

In this study, fresh garlic from Jinxiang was fermented to black garlic by -18¡ãC pretreatment combined with variable temperature fermentation for the first time. The total color difference, water content, texture, reducing sugar content, total phenol content, free amino acid content, volatile components and sensory indexes of black garlic were determined in order to compare the quality characteristics of lab-prepared fermented black garlic (FBG) and three kinds of com. black garlic made by traditional processing. The results indicated that the fermentation period by the new processing method with frozen pretreatment decreased, which was shortened from 60-90 days to 15 days and FBG made by the new processing method was similar or better than the com. black garlic by traditional processing in terms of sensory indexes, nutrition and functional components. The reducing sugar content, total phenol content, free amino acid content of FBG reached to (48.50 ¡À 0.44) ¡Á 10^-2 g/g, 10.44 ¡À 0.53 mg/g, (54.90 ¡À 0.61) ¡Á 10^-2 mg/g, resp., by the new method. At the same time, the contents of 17 kinds of amino acid and volatile components are equal or higher than those of the com. black garlic. Therefore, the new processing technol. for FBG shortened the fermentation period, and ensured the quality of black garlic products. These results provided references for black garlic processing industry in China.

Xiandai Shipin Keji 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 C16H24BNO2, Recommanded Product: 1,1-Dimethylthiourea.

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

Liu, Yongan published the artcileTrifluoromethylfluorosulfonylation of Unactivated Alkenes Using Readily Available Ag(O₂CCF₂SO₂F) and N-fluorobenzenesulfonimide, Recommanded Product: Allyldiphenylphosphine oxide, the publication is Angewandte Chemie, International Edition (2017), 56(48), 15432-15435, database is CAplus and MEDLINE.

Presented is a novel intermol. radical trifluoromethylfluorosulfonylation of unactivated alkenes under mild reaction conditions with good functional-group tolerance in the most atom-economic manner by using readily available Ag(O₂CCF₂SO₂F) and N-fluorobenzenesulfonimide (NFSI). Both the trifluoromethyl and sulfonyl groups in the products originate from Ag(O₂CCF₂SO₂F).

Angewandte Chemie, International Edition published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, Recommanded Product: Allyldiphenylphosphine oxide.

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

Huang, He published the artcileSuper-flexible, thermostable and superhydrophobic polyimide/silicone interpenetrating aerogels for conformal thermal insulating and strain sensing applications, Application In Synthesis of 13822-56-5, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 136032, database is CAplus.

Soft and thermostable materials are crucial to applications in the fields of aerospace, wearable materials, and artificial intelligence (AI) in harsh environments. However, decided by the mol. structures, most soft materials are easy to pyrolyze at 100-200¡ãC, hindering developments in the critical technologies for such applications. In this work, through a rational “slice/sphere” dual-morphol. microstructure design, a hydrogen-bonded polyimide/silicone aerogel is obtained with a two-step-gelling process. As rationally discussed with evidence, the recoverable “air compression” and the “silicone sphere deformation” contribute to the superflexibility, with the low elastic modulus (0.155 kPa), high cyclic compressive strain (90%), and good fatigue-resistance (600 cycles at 50% strain). Addnl., the structure and components together endow the composite with light weight (0.14-0.16 g cm^-3), low bulk shrinkage (less than5%), superhydrophobicity (water contact angle of 150.1¡ã), prominent thermostability (weight remains 90% at 474¡ãC), promising thermal insulating performance below 600¡ãC, and stable sensing ability at 300¡ãC. The efficient thermal insulation, sensible pizeopermittivity and endurance in a wide temperature window (-196-400¡ãC) make it feasible for conformal thermal protection and strain sensors for aerospace, and AI applications under harsh conditions.

Chemical Engineering Journal (Amsterdam, Netherlands) 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, Application In Synthesis of 13822-56-5.

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

Tangdenpaisal, Kassrin published the artcileDesigning New Analogs for Streamlining the Structure of Cytotoxic Lamellarin Natural Products, Synthetic Route of 4230-93-7, the publication is Chemistry – An Asian Journal (2015), 10(4), 925-937, database is CAplus and MEDLINE.

Despite the therapeutic potential of marine-derived lamellarin natural products, their preclin. development has been hampered by their lipophilic nature, causing very poor aqueous solubility In order to develop more drug-like analogs, their structure was streamlined in this study from both the cytotoxic activity and lipophilicity standpoints. First, a modified total synthetic route was successfully devised to construct a library of 59 systematically designed lamellarin analogs, which were then subjected to cytotoxicity and log P determinations [e.g., I with single or double bond as indicated by dotted line; R = H, Me; X = H, OH; Y = H, OMe; A, B = H, OH]. Along with the 25 first-generation lamellarins previously synthesized in our laboratory, the structure-activity and structure-lipophilicity relationships were extensively evaluated. Our results clearly indicated the addnl. structural requirements around the lamellarin skeleton which, when combined with those reported previously, can provide invaluable guidance for further modifications to increase the aqueous solubility of these compounds

Chemistry – An Asian Journal published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C15H10O2, Synthetic Route of 4230-93-7.

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

Tangdenpaisal, Kassrin published the artcileDesigning New Analogs for Streamlining the Structure of Cytotoxic Lamellarin Natural Products, Application of 2-(3-(Benzyloxy)phenyl)acetic acid, the publication is Chemistry – An Asian Journal (2015), 10(4), 925-937, database is CAplus and MEDLINE.

Despite the therapeutic potential of marine-derived lamellarin natural products, their preclin. development has been hampered by their lipophilic nature, causing very poor aqueous solubility In order to develop more drug-like analogs, their structure was streamlined in this study from both the cytotoxic activity and lipophilicity standpoints. First, a modified total synthetic route was successfully devised to construct a library of 59 systematically designed lamellarin analogs, which were then subjected to cytotoxicity and log P determinations [e.g., I with single or double bond as indicated by dotted line; R = H, Me; X = H, OH; Y = H, OMe; A, B = H, OH]. Along with the 25 first-generation lamellarins previously synthesized in our laboratory, the structure-activity and structure-lipophilicity relationships were extensively evaluated. Our results clearly indicated the addnl. structural requirements around the lamellarin skeleton which, when combined with those reported previously, can provide invaluable guidance for further modifications to increase the aqueous solubility of these compounds

Chemistry – An Asian Journal published new progress about 1860-58-8. 1860-58-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(3-(Benzyloxy)phenyl)acetic acid, and the molecular formula is C17H14O5, Application of 2-(3-(Benzyloxy)phenyl)acetic acid.

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

Bustamante, Heriberto published the artcileInteraction of dodecylamine and sodium dodecyl sulfate with a low-rank bituminous coal, Formula: C14H31NO2, the publication is Colloids and Surfaces (1984), 12(3-4), 381-99, database is CAplus.

The electrokinetic behavior of a low-rank bituminous coal (Great Northern coal), its carbonaceous matter, and its mineral matter (mainly kaolinite) have been studied. The major contributor to the neg. zeta potential of the coal was the mineral matter, especially at pH <6.0. Flotation tests showed that dodecylammonium cations adsorbed on nonpolar carbonaceous matter decreasing its hydrophobicity, indicating that the mol. orientation of the cations was reversed. On weathered coal, in which both the carbonaceous and the mineral matter were extensively neg. charged, dodecylammonium was adsorbed with the polar group interacting with the surface; therefore, all types of composite grains became hydrophobic. Adsorption of Na?dodecyl?sulfate??[151-21-3] on Great Northern coal was almost an order of magnitude lower than that of dodecylammonium?acetate??[2016-56-0] under all conditions.

Colloids and Surfaces 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, Formula: C14H31NO2.

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

Xu, Yan published the artcileEfficient Z-Selective Olefin-Acrylamide Cross-Metathesis Enabled by Sterically Demanding Cyclometalated Ruthenium Catalysts, Recommanded Product: 1,1,1-Trifluoropropan-2-amine, the publication is Journal of the American Chemical Society (2020), 142(50), 20987-20993, database is CAplus and MEDLINE.

The efficient Z-selective cross-metathesis between acrylamides and common terminal olefins has been developed by the use of novel cyclometalated ruthenium catalysts with bulky N-heterocyclic carbene (NHC) ligands. Superior reactivity and stereoselectivity are realized for the first time in this challenging transformation, allowing streamlined access to an important class of cis-Michael acceptors from readily available feedstocks. The kinetic preference for cross-metathesis is enabled by a pivalate anionic ligand, and the origin of this effect is elucidated by d. functional theory calculations

Journal of the American Chemical Society 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 C11H11NO2, Recommanded Product: 1,1,1-Trifluoropropan-2-amine.

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

Ackermann, Sarah L. published the artcileCrystallographic Snapshot of an Arrested Intermediate in the Biomimetic Activation of CO₂, Application In Synthesis of 17351-62-1, the publication is Angewandte Chemie, International Edition (2015), 54(1), 164-168, database is CAplus and MEDLINE.

The design of mol. catalysts that mimic the behavior of enzymes is a topical field of activity in emerging technologies, and can lead to an improved understanding of biol. systems. Herein, we report how the bulky arms of the cations in [(n-C₄H₉)₄N]⁺[HCO₃]^– give rise to a host scaffold that emulates the substrate binding sites in carbonic anhydrase enzymes, affording a unique glimpse of an arrested intermediate in the base-mediated binding and activation of CO₂.

Angewandte Chemie, International Edition 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, Application In Synthesis of 17351-62-1.

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

Chandrachud, Preeti P. published the artcileDecarboxylative Amination: Diazirines as Single and Double Electrophilic Nitrogen Transfer Reagents, SDS of cas: 2051-95-8, the publication is Journal of the American Chemical Society (2020), 142(52), 21743-21750, database is CAplus and MEDLINE.

The ubiquity of nitrogen-containing small mols. in medicine necessitates the continued search for improved methods for C-N bond formation. Electrophilic amination often requires a disparate toolkit of reagents whose selection depends on the specific structure and functionality of the substrate to be aminated. Further, many of these reagents are challenging to handle, engage in undesired side reactions, and function only within a narrow scope. Here, we report the use of diazirines as practical reagents for the decarboxylative amination of simple and complex redox-active esters. The diaziridines thus produced are readily diversifiable to amines, hydrazines, and nitrogen-containing heterocycles in one step. The reaction has also been applied in fluorous phase synthesis with a perfluorinated diazirine.

Journal of the American Chemical Society 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 C10H10O3, SDS of cas: 2051-95-8.

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