Tag: M.W=250-300

Shan, Changli; Ning, Chuang; Lou, Jingjie; Xu, Wei; Zhang, Yingqiang published the artcile< Design and preparation of UV-curable waterborne polyurethane based on novel fluorinated chain extender>, Reference of 112-63-0, the main research area is UV curable waterborne polyurethane fluorine chain extender design preparation.

A series of UV-curable waterborne fluorinated polyurethane (UV-WFPU) were prepared successfully based on novel fluorinated side chain extender (F-TMP). The structure of F-TMP and particle size of UV-WFPU dispersions, contact angle (CA) and surface free energy, morphol., and damping property of UV-WFPU films were characterized through Fourier transform IR spectroscopy, nanoparticle size anal., contact angle test, scanning electron microscope and dynamic mech. anal. (DMA), resp. The results indicated that UV-WFPU dispersions had a particle size between 49.01 and 61.52 nm. The latex particle size and tan 鏈?value of UV-WFPU films increased with the increase in F-TMP contents. The studies of surface properties confirmed that UV-WFPU films based on F-TMP had outstanding hydrophobicity properties. The highest CA of water and lowest surface free energy of UV-WFPU films reached 96.2鎺?and 21.17 mJ/m2, resp. Meanwhile, the DMA results showed UV-WFPU films possessed great damping property which had the broad temperature range enhanced by F-TMP, with a maximum value at 190.4鎺矯. The results of mech. properties showed that the addition of fluorine increased in the tensile strength of the film. And these films have potential application values in the tech. fields of damping, anti-corrosion and dust prevention.

Polymer Bulletin (Heidelberg, Germany) published new progress about Anticorrosive coating materials. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Vielhaber, Thomas; Heizinger, Christian; Topf, Christoph published the artcile< Homogeneous pressure hydrogenation of quinolines effected by a bench-stable tungsten-based pre-catalyst>, Related Products of 112-63-0, the main research area is quinoline tungsten catalyst hydrogenation; tetrahydroquinoline preparation.

An operationally simple catalytic method for the tungsten-catalyzed hydrogenation of quinolines through the use of the easily handled and self-contained precursor [WCl(鐣?-Cp)(CO)3] were reported. This half sandwich complex is indefinitely storable on the bench in simple screw-capped bottles or stoppered flasks and can, if required, be prepared on a multi-gram scale while the actual catalytic transformations were performed in the presence of a Lewis acid in order to achieve both decent substrate conversions and product yields. The described method represents a facile and atom-efficient access to a variety of 1,2,3,4-tetrahydroquinolines that circumvents the use of cost-intensive and oxygen-sensitive phosphine ligands as well as auxiliary hydride reagents.

Journal of Catalysis published new progress about Hydrogenation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Hu, Siwei; Huang, Biwu; Chen, Weiqing published the artcile< Synthesis of 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane and Research on Its UV-curing Performance>, Quality Control of 112-63-0, the main research area is methoxyoxetane propyl trisiloxane preparation epoxy UV curing mech property.

A compound, 3-ethyl-3-hydroxymethyloxetane (EHO), was synthesized with di-Et carbonate and trihydroxypropane as raw materials, 3-ethyl-3-allylmethoxy oxetane (EAMO) was synthesized with EHO and allyl bromide, and 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane (HMBEMOPTS) was synthesized with EAMO and 1,1,3,3,5,5-hexamethyltrisiloxane (HMTS). HMBEMOPTS is a novel UV-curable oligomer. The test of photo-DSC shows the photosensitivity of HMBEMOPTS is better than the ordinary oxetane, 3-ethyl-3-[(3-ethyloxetan-3-yl)methoxymethyl]oxetane. HMBEMOPTS was mixed with bisphenol A type epoxy resin E-51 to prepare a cationic UV-curable system, and triarylsulfonium hexafluoroantimonate (UV-6976) was used as a cationic photoinitiator. The mech. tests of coating films prove that when the mass fraction of HMBEMOPTS is 50%, the mech. properties of the curing system are the best. The impact strength of the UV-curable films is measured to be 40 kg-cm and the flexibility is 2 mm; the tensile strength and flexural strength of the prepared specimens are 20.74 MPa and 13.43 MPa, resp. The exptl. results show that HMBEMOPTS can effectively improve photosensitivity and flexibility of the photosensitive resin.

Journal of Wuhan University of Technology, Materials Science Edition published new progress about Bending strength. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Huang, Chen; Feng, Jie; Ma, Rui; Fang, Shuaishuai; Lu, Tao; Tang, Weifang; Du, Ding; Gao, Jian published the artcile< Redox-Neutral Borylation of Aryl Sulfonium Salts via C-S Activation Enabled by Light>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is aryl sulfonium salt preparation photochem redox neutral borylation pinacolatodiboron; arylboronate ester preparation; methyl aryl thioether methylation methyl triflate.

Reported here is a novel photoinduced strategy for the borylation of aryl sulfonium salts using bis(pinacolato)diboron as the B source. This method exploits redox-neutral aryl sulfoniums to gain access to aryl radicals via C-S bond activation upon photoexcitation under transition-metal-free conditions. Therefore, it grants access to diverse arylboronate esters with good performance from easily available aryl sulfoniums accompanied by mild conditions, operational simplicity, and easy scalability.

Organic Letters published new progress about Boranes Role: SPN (Synthetic Preparation), PREP (Preparation) (arylboronate esters). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Hongming; Wang, Yi; Tang, Liang; Deng, Li published the artcile< Highly Enantioselective Conjugate Addition of Malonate and 灏?Ketoester to Nitroalkenes: Asymmetric C-C Bond Formation with New Bifunctional Organic Catalysts Based on Cinchona Alkaloids>, Synthetic Route of 112-63-0, the main research area is nitroester enantioselective preparation; gamma nitroester enantioselective prepare; hydroxyquinidine hydroxyquinuclidine catalyst Michael addition malonate acetoacetate nitroalkene; enantioselective Michael addition malonate nitroalkene hydroxyquinidine hydroxyquinuclidine catalyst; aryl heteroaryl alkyl nitroalkene enantioselective Michael addition malonate hydroxyquinidine; hydroxyquinine aryl heteroaryl alkyl nitroalkene enantioselective Michael addition malonate; rate dependence enantioselective Michael addition nitroalkene malonate hydroxyquinine; conjugate addition malonate ketoester nitroalkene cinchona alkaloid bifunctional catalyst; asym bond formation bifunctional organic catalyst cinchona alkaloid.

Quinine and quinidine derivatives such as I and II are prepared; in the presence of I or II, nitroalkanes (E)-RCH:CHNO2 (R = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-Me2CHC6H4, 4-MeOC6H4, 3-MeC6H4, 2-MeC6H4, 2-FC6H4, 2-O2NC6H4, 1-naphthyl, 2-thienyl, 2-furyl, 3-pyridinyl, BuCH2, Me2CHCH2, c-C6H11) undergo enantioselective addition reactions with di-Me malonate to provide either enantiomer of the nitroesters O2NCH2CHRCH(CO2Me)2 (III) (R = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-MeC6H4, 4-Me2CHC6H4, 4-MeOC6H4, 3-MeC6H4, 2-MeC6H4, 2-FC6H4, 2-O2NC6H4, 1-naphthyl, 2-thienyl, 2-furyl, 3-pyridinyl, BuCH2, Me2CHCH2, c-C6H11) in 71-99% yields and in 91-97% ee. Aryl, heteroaryl, and alkyl-substituted nitroalkenes give conjugate addition products in high yields and enantioselectivities. Cinchona alkaloids with a 6′-hydroxy group yield III with much higher enantioselectivities than those bearing 6′-methoxy groups; etherification of the secondary alc. of alkaloids such as I or II alters the enantioselectivity and yield of Michael addition reactions catalyzed by them minimally. The enantioselectivity of Michael additions catalyzed by I and II is attributed to bifunctional catalysis using both the 6′-hydroxy group and the quinuclidine amine moiety. Kinetic studies on the addition of di-Me malonate to III (R = Ph) in the presence of I indicate that the rate of reaction is first order in nitroalkene, di-Me malonate, and catalyst. Et acetoacetate undergoes conjugate addition to trans-灏?nitrostyrene III (R = Ph) to yield 绾?nitro ester O2NCH2CHPhCHAcCO2Et as a 1:1 mixture of diastereomers at the 浼?acetyl ester in 93% yield; both diastereomers are isolated in 91% ee.

Journal of the American Chemical Society published new progress about 1,3-Dicarbonyl compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sandmark, Jenny; Tigerstroem, Anna; Akerud, Tomas; Althage, Magnus; Antonsson, Thomas; Blaho, Stefan; Bodin, Cristian; Bostroem, Jonas; Chen, Yantao; Dahlen, Anders; Eriksson, Per-Olof; Evertsson, Emma; Fex, Tomas; Fjellstroem, Ola; Gustafsson, David; Hersloef, Margareta; Hicks, Ryan; Jarkvist, Emelie; Johansson, Carina; Kalies, Inge; Svalstedt, Birgitta Karlsson; Kartberg, Fredrik; Legnehed, Anne; Martinsson, Sofia; Moberg, Andreas; Ridderstroem, Marianne; Rosengren, Birgitta; Sabirsh, Alan; Thelin, Anders; Vinblad, Johanna; Wellner, Annika U.; Xu, Bingze; Oestlund-Lindqvist, Ann-Margret; Knecht, Wolfgang published the artcile< Identification and analyses of inhibitors targeting apolipoprotein(a) kringle domains KIV-7, KIV-10, and KV provide insight into kringle domain function>, Related Products of 112-63-0, the main research area is preparation inhibitor targeting apolipoprotein kringle domain; Lp(a); X-ray crystallography; apo(a); apolipoprotein; apolipoprotein(a); cardiovascular disease; crystal structure; crystallography; drug design; drug discovery; low-density lipoprotein (LDL); small molecule inhibitor; surface plasmon resonance (SPR).

Increased plasma concentrations of lipoprotein(a) (Lp(a)) are associated with an increased risk for cardiovascular disease. Lp(a) is composed of apolipoprotein(a) (apo(a)) covalently bound to apolipoprotein B of low-d. lipoprotein (LDL). Many of apo(a)’s potential pathol. properties, such as inhibition of plasmin generation, have been attributed to its main structural domains, the kringles, and have been proposed to be mediated by their lysine-binding sites. However, available small-mol. inhibitors, such as lysine analogs, bind unselectively to kringle domains and are therefore unsuitable for functional characterization of specific kringle domains. Here, we discovered small mols. that specifically bind to the apo(a) kringle domains KIV-7, KIV-10, and KV. Chem. synthesis yielded compound AZ-05, which bound to KIV-10 with a Kd of 0.8娓璏 and exhibited more than 100-fold selectivity for KIV-10, compared with the other kringle domains tested, including plasminogen kringle 1. To better understand and further improve ligand selectivity, we determined the crystal structures of KIV-7, KIV-10, and KV in complex with small-mol. ligands at 1.6-2.1 鑴?resolutions Furthermore, we used these small mols. as chem. probes to characterize the roles of the different apo(a) kringle domains in in vitro assays. These assays revealed the assembly of Lp(a) from apo(a) and LDL, as well as potential pathophysiol. mechanisms of Lp(a), including (i) binding to fibrin, (ii) stimulation of smooth-muscle cell proliferation, and (iii) stimulation of LDL uptake into differentiated monocytes. Our results indicate that a small-mol. inhibitor targeting the lysine-binding site of KIV-10 can combat the pathophysiol. effects of Lp(a).

Journal of Biological Chemistry published new progress about Apolipoprotein A Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rezaei-Chiyaneh, Esmaeil; Battaglia, Martin Leonardo; Sadeghpour, Amir; Shokrani, Fahime; Nasab, Adel Dabbagh Mohammadi; Raza, Muhammad Ali; von Cossel, Moritz published the artcile< Optimizing Intercropping Systems of Black Cumin (Nigella sativa L.) and Fenugreek (Trigonella foenum-graecum L.) through Inoculation with Bacteria and Mycorrhizal Fungi>, Quality Control of 112-63-0, the main research area is Nigella Trigonella intercropping system bacteria mycorrhizal fungi biofertilizer.

This study evaluates the effects of intercropping patterns, plant growth-promoting rhizobacteria and arbuscular mycorrhizal fungi (AMF) on seed yield and yield components of black cumin (Nigella sativa L.) and fenugreek (Trigonella foenum-graecum L.), as well as the essential oil and fatty acid profile of black cumin. A two-year two-factorial field experiment was conducted in 2015 and 2016 to investigate intercropping of black cumin and fenugreek in five ratios and biofertilizer application as AMF and bacteria. Intercropping reveals higher concentrations of nitrogen and phosphorus compared with monocropping, whereas monocropping inoculated with bacteria shows the highest seed yield of both fenugreek (151 g m-2) and black cumin (148 g m-2). Regarding the quality of black cumin, the combination of a black cumin:fenugreek-intercropping pattern of 66:34 with bacteria fertilization is most promising, as it shows i) the maximum essential oil content, oil yield, and fixed oil content, ii) the highest contents of thymol and p-cymene, iii) the highest content of linoleic acid, and iv) the maximum land equivalent ratio. Conclusively, bacteria fertilization and black cumin:fenugreek-intercropping pattern of 66:34 helps improving essential oil, fixed oil quality, and quantity of black cumin, thus creating a more sustainable cultivation system for black cumin and fenugreek.

Advanced Sustainable Systems published new progress about Atmospheric precipitation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Benecke, Ingrid published the artcile< Resolution of underivatized 2-hydroxy acids by high-performance liquid chromatography>, Formula: C19H34O2, the main research area is resolution hydroxy acid HPLC; liquid chromatog resolution hydroxy acid; reversed phase HPLC hydroxy acid; copper amino acid chiral phase; mobile phase chiral HPLC.

A high-performance liquid chromatog. method for enantiomeric separation of free 2-hydroxy acids is described. Reversed-phase chromatog. and Cu(II) complexes of N,N-dialkyl-L-amino acids as chiral mobile phases are used for the separation The detection is performed by post-column derivatization with Fe(III) and subsequent visible absorption measurement.

Journal of Chromatography published new progress about Hydroxycarboxylic acids Role: ANST (Analytical Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Gang; Presly, Oliver; White, Fraser; Oppel, Iris M.; Mastalerz, Michael published the artcile< A Permanent Mesoporous Organic Cage with an Exceptionally High Surface Area>, SDS of cas: 112-63-0, the main research area is mesoporous organic cage compound surface area boronic ester triptycene; boronic acids; cage compounds; dynamic covalent chemistry; porosity; triptycene.

Recently, porous organic cage crystals have become a real alternative to extended framework materials with high sp. surface areas in the desolvated state. Although major progress in this area has been made, the resulting porous compounds are restricted to the microporous regime, owing to the relatively small mol. sizes of the cages, or the collapse of larger structures upon desolvation. Herein, we present the synthesis of a shape-persistent cage compound by the reversible formation of 24 boronic ester units of 12 triptycene tetraol mols. and 8 triboronic acid mols. The cage compound bears a cavity of a min. inner diameter of 2.6 nm and a maximum inner diameter of 3.1 nm, as determined by single-crystal X-ray anal. The porous mol. crystals could be activated for gas sorption by removing enclathrated solvent mols., resulting in a mesoporous material with a very high sp. surface area of 3758 m2 g-1 and a pore diameter of 2.3 nm, as measured by nitrogen gas sorption.

Angewandte Chemie, International Edition published new progress about Crystal structure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jorge, Ana Rita; Chernobryva, Mariya; Rigby, Stephen E. J.; Watkinson, Michael; Resmini, Marina published the artcile< Incorporation of Cobalt-Cyclen Complexes into Templated Nanogels Results in Enhanced Activity>, Reference of 112-63-0, the main research area is cobalt cyclen complex phosphonate mol imprinting nanogel; cyclen; enzyme mimics; molecular imprinting; nanogels; phosphatase.

Recent advances in nanomaterials have identified nanogels as an excellent matrix for novel biomimetic catalysts using the mol. imprinting approach. Polymerisable Co-cyclen complexes with phosphonate and carbonate templates were prepared, fully characterized and used to obtain nanogels that show high activity and turnover with low catalytic load, compared to the free complex, in the hydrolysis of 4-nitrophenyl phosphate, a nerve agent simulant. The chem. structure of the template has an impact on the coordination geometry and oxidation state of the metal center in the polymerisable complex resulting in very significant changes in the catalytic properties of the polymeric matrix. Both pseudo-octahedral Co(III) and trigonal-bipyramidal Co(II) structures were used for the synthesis of imprinted nanogels, and the catalytic data demonstrate that: (i) the imprinted nanogels can be used in 15% load and show turnover; (ii) the structural differences in the polymeric matrixes resulting from the imprinting approach with different templates are responsible for the mol. recognition capabilities and the catalytic activity. Nanogel P1, imprinted with the carbonate template, shows > 50% higher catalytic activity than P2 imprinted with the phosphonate.

Chemistry – A European Journal published new progress about Hydrolysis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics