Tag: M.W=250-300

Barkane, Anda published the artcileSimultaneous wettability and stiffness control of UV-curing vegetable oil resin composites by lignocellulosic components, HPLC of Formula: 15625-89-5, the publication is Polymer (2022), 125154, database is CAplus.

Acrylic resins have various applications, which range from coatings to 3D printing, among others. Following green chem. and environmental preservation trends, the demand for bio-based acrylic resins is growing. Vegetable oil-based resins have arisen to meet the present challenge. However, the performance and tuning of sustainable resin properties still need improvement. Hence, we undertook this study to research tuneable and durable vegetable oil-based UV-curing composite resins. This work reports on vegetable oil-based resin loaded with lignocellulosic components of cellulose nanocrystals (CNC), cellulose nanofibres (CNF), hemicellulose (HC), and lignin (LN). The effects of lignocellulosic components on thermal stability, thermomech. properties, transparency, surface morphol., and wettability were evaluated in detail. In addition, the interaction of lignocellulosic components with the polymer matrix and interface was thoroughly investigated. The intense interaction between lignocellulosic components and the polymer matrix helps to form a strong interface and creates a polymer composite with enhanced thermomech. properties. The composite surface morphol. and wettability can be tuned depending on the lignocellulosic component, i.e., with the addition of HC, CNC, and CNF. Hydrophilic affinity is improved and water wetting angles as low as 8° can be achieved, but with LN a value of 96° was observed, a slight increase in hydrophobicity compared to the vegetable oil (VO) matrix value of 90°. Adding HC and CNC reduced transparency at 500 nm by 14 and 16%, while adding LN and CNF by 18 and 25%, resp. Fourier-transform IR spectroscopy revealed strong interfacial interactions through the hydrogen bonding between CNC, CNF, HC, and the VO polymer. This work will shed light on the lignocellulosic components’ future role in UV-curing resin applications. It also broadens lignocellulosic particles’ application as reinforcing additives for UV-light sensitive polymeric resins.

Polymer published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, HPLC of Formula: 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Pagidi, Srinivas published the artcileNanosize-confined nematic liquid crystals at slippery interfaces of polymer composites consisting of poly(hexyl methacrylate), Application of Trimethylolpropane triacrylate, the publication is Journal of Molecular Liquids (2022), 118540, database is CAplus.

Nanosize-confinement of anisotropic mol. arrangement below the wavelength of visible light gives fascinating and useful optical and phys. properties. Liquid crystal (LC) and polymer composite is one of the most well-known combinations to explore such effect for applications from optical modulating devices to sensors. The nanosize-confinement, however, causes inevitably strong surface interaction, which requires high-operating voltage to reorient LC directors. Herein, we demonstrate nanosize-confined LCs embedded in photopolymerizable polymer composites including poly(hexyl methacrylate) (PHMA) with glass transition below room temperature, which can provide slippery interfaces owing to weak anchoring strength. Using the slippery interface in the nanosize-confined electro-optic device gives highly improved electro-optic properties: up to, resp., 41.1% and 22.2% reduced threshold and operating elec. field strength and up to 57.3% enhanced transmittance compared to those without PHMA. We believe this approach, providing a slippery interface in LC-polymer composites, will contribute to practical realization of optically isotropic-to-anisotropic switching mechanisms for next-generation optical modulation devices.

Journal of Molecular Liquids published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Application of Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dhanoa, Daljit S. published the artcileThe synthesis of potent macrocyclic renin inhibitors, Related Products of esters-buliding-blocks, the publication is Tetrahedron Letters (1992), 33(13), 1725-8, database is CAplus.

An efficient synthesis of a novel class of potent macrocyclic renin inhibitors, exemplified by compounds I [R = Et, Bu, n-hexyl, morpholinomethyl, R¹ = Boc-Phe; R = Bu, morpholinomethyl, R¹ = (S)-Me₃CSO₂CH₂CH(CH₂Ph)CO; Boc = Me₃CO₂C], which involves the macrocyclization of glutamine derivative II as the key step, is described. The macrocyclic design of renin inhibitors I disclosed here incorporates (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutanoic acid as the transition-state isostere. Determination of stereochem. at the P₂‘ position of the more potent diastereomer of the 13-membered cyclic renin inhibitors I [R = morpholinomethyl, R¹ = PhCH₂O₂C, Boc-Phe, (S)-Me₃CSO₂CH₂CH(CH₂Ph)CO] is presented.

Tetrahedron Letters published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Okubo, Teiji published the artcileRadiolysis of sulfuric acid esters in dilute aqueous solution by Co⁶⁰ γ-radiation, Recommanded Product: Potassium 4-nitrophenyl sulfate, the publication is Repts. Liberal Arts Sci. Fac. Shizuoka Univ., Nat. Sci. (1959), 203-7, database is CAplus.

K salts of several sulfuric acid esters (0.1 M) were irradiated at pH 5.8. After 18,000 r. γ-radiation the acid formed was determined from the pH change. Esters irradiated, acid yield in micromoles/10 ml., and G-value are as follows: Me, 0.42, 2.7; Et, 0.32, 2.1; Pr, 0.06, 0.4; iso-Pr, 0.12, 0.8; Bu, 0.07, 0.5; amyl, 0.08, 0.5; cyclohexyl, 0.04, 0.3; benzyl, 0.69, 4.4; Ph, 0.67, 4.3; p-tolyl, 0.71, 4.6; p-nitrophenyl, 0.69, 4.4. The acid yield was proportional to dose from 5000 r. to 30,000 r. No effect of the dose rate at 15-60 r./min. was observed. The acid yield of K ethyl sulfate increased linearly with ester concentration to 0.1M and was then constant to 0.4M. KMeSO₄ or KEtSO₄ (0.1M) may be used as a chem. dosimeter for measuring x- or γ-radiation in the dose range 5000-50,000 r.

Repts. Liberal Arts Sci. Fac. Shizuoka Univ., Nat. Sci. published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Recommanded Product: Potassium 4-nitrophenyl sulfate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ohno, Tomoyasu published the artcileSynthesis and structure-activity relationship of 4-substituted benzoic acids and their inhibitory effect on the biosynthesis of fatty acids and sterols, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Archiv der Pharmazie (Weinheim, Germany) (2005), 338(4), 147-158, database is CAplus and MEDLINE.

The synthesis of 4-[3-(substituted phenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acids and their inhibitory effects on the biosynthesis of fatty acids and sterols is described. IC₅₀ values in vitro were 10^-6 and 10^-5 M, resp. Though the in vitro inhibitory activity of all these compounds toward sterol biosynthesis was inferior to that of pravastatin, several compounds had a stronger reducing effect in Sprague-Dawley (SD) rat on both, cholesterol (TC) and triglyceride (TG), than pravastatin and bezafibrate. The potent compounds were present at high concentrations in rat liver. The enantiomers of the potent racemic compound (4-[3-(4-bromo-2-fluorophenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acid) were prepared and their activity was examined in vivo and in vitro. In vivo, each enantiomer possessed more activity than the racemic compound Further, in Watanabe hereditable hyperlipidemic (WHHL) rabbit, optically active (R)-4-[3-(4-bromo-2-fluorophenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acid also potently reduced the effect of both TC and TG on serum levels, compared with pravastatin and bezafibrate.

Archiv der Pharmazie (Weinheim, Germany) published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Borjigin, Timur published the artcileThe new LED-Sensitive photoinitiators of Polymerization: Copper complexes in free radical and cationic photoinitiating systems and application in 3D printing, Recommanded Product: Trimethylolpropane triacrylate, the publication is European Polymer Journal (2022), 110885, database is CAplus.

A ligand (A1) and four copper complexes (Cu1, Cu2, Cu3 and Cu4) were examined as photosensitizers in various photoinitiating systems (PISs). Interestingly, excellent photochem. reactivities were determined with the different compounds Especially, notable photoinitiation abilities were determined upon exposure to LED@405 nm during the free radical polymerization of acrylates and the cationic polymerization of epoxides when combined with an iodonium salt and an amine. With regards to their remarkable reactivities, the different photoinitiating systems were applied to 3D printing experiments By combining steady state photolysis and ESR spin trapping, the chem. mechanism supporting the polymerization processes could be fully detailed and proved. Among all PISs studied, the three-component PISs furnished the best monomer conversions during the free radical polymerization of trimethylolpropane triacrylate (TMPTA) and the cationic polymerization of (3,4-epoxycyclohexane)methyl 3,4-epoxycyclohexylcarboxylate (EPOX) monomers. The conversion process was monitored by real-time Fourier transform IR spectroscopy (RT-FTIR). Three-component PISs based on A1, Cu1 and Cu2 showed better performances than those based on Cu3, Cu4 and the different two-component PIS (comprising only the iodonium salt or the amine) in FRP experiments Based on the outstanding photoinitiation abilities of A1 and Cu1 with both TMPTA and EPOX, smooth and regular 3D patterns could be obtained by direct laser write experiments by generating interpenetrating polymer networks (IPN) with the blend of these two monomers.

European Polymer Journal published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Recommanded Product: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Thompson, Andrew M. published the artcileRepositioning Antitubercular 6-Nitro-2,3-dihydroimidazo[2,1-b][1,3]oxazoles for Neglected Tropical Diseases: Structure-Activity Studies on a Preclinical Candidate for Visceral Leishmaniasis, Product Details of C9H9NO6S, the publication is Journal of Medicinal Chemistry (2016), 59(6), 2530-2550, database is CAplus and MEDLINE.

6-Nitro-2,3-dihydroimidazo[2,1-b][1,3]oxazole derivatives were initially studied for tuberculosis within a backup program for the clin. trial agent pretomanid (PA-824). Phenotypic screening of representative examples against kinetoplastid diseases unexpectedly led to the identification of DNDI-VL-2098 as a potential first-in-class drug candidate for visceral leishmaniasis (VL). Addnl. work was then conducted to delineate its essential structural features, aiming to improve solubility and safety without compromising activity against VL. While the 4-nitroimidazole portion was specifically required, several modifications to the aryloxy side chain were well-tolerated e.g., exchange of the linking oxygen for nitrogen (or piperazine), biaryl extension, and replacement of Ph rings by pyridine. Several less lipophilic analogs displayed improved aqueous solubility, particularly at low pH, although stability toward liver microsomes was highly variable. Upon evaluation in a mouse model of acute Leishmania donovani infection,phenylpyridine derivative I stood out, providing efficacy surpassing that of the original preclin. lead.

Journal of Medicinal Chemistry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C7H8O3, Product Details of C9H9NO6S.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Gary, Daniel P. published the artcileCharge transfer complexes as dual thermal/photo initiators for free-radical frontal polymerization, SDS of cas: 15625-89-5, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(10), 1624-1630, database is CAplus.

Frontal polymerization is a process in which a localized reaction zone propagates from the coupling of thermal transport and the Arrhenius rate dependence of an exothermic polymerization; monomer is converted into polymer as the front passes through an unstirred medium. Herein we report the first study of charge transfer complexes (CTCs) as photo/thermal initiators for free-radical frontal polymerization Front velocity was studied as a function of mole ratio between an aromatic amine, such as dimethyl-p-toluidine or dimethylaniline, and an iodonium salt. It was found that the front velocity reached a maximum at a certain mole ratio of amine to iodonium salt. The velocity remained constant upon increasing the ratio of amine to iodonium salt past this critical ratio. Fronts were also studied using N-Ph glycine as an electron donor, but its utility was limited by low solubility Lastly, the steric and electronic effects of the iodonium salt and counter anion were explored. It was found that CTCs using iodonium salts with less nucleophilic anions gave higher front velocities. In terms of intrinsic reactivity, the CTC composed of N,N-dimethyl-p-toluidine and bis[4-(tert-butyl)phenyl]iodonium tetra(nonafluoro-tert-butoxy)aluminate gave the highest front velocity per m of iodonium salt.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, SDS of cas: 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Burgos, Carmen E. published the artcileAsymmetric synthesis of the diastereoisomers of the leukotriene B₄ antagonist, U-75302, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Tetrahedron Letters (1989), 30(38), 5081-4, database is CAplus.

A synthesis of the 4 diastereoisomers of U-75302 (I) was completed with (R)- and (S)-glycidol as the precursors to the C-5 chiral centers and asym. reductions of a ketone to generate the C-12 centers. (12R)-I are the active leukotriene B₄ antagonists.

Tetrahedron Letters published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Fagerstroem, Alexandra published the artcileNew propranolol analogues: binding and chiral discrimination by cellobiohydrolase Cel7A, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Organic & Biomolecular Chemistry (2006), 4(16), 3067-3076, database is CAplus and MEDLINE.

Novel propranolol analogs have been designed and synthesized and their enantioselective binding to the cellulose degrading enzyme, Cel7A, has been evaluated. Affinity and enantioselectivity have been determined by capillary electrophoresis experiments Ligands with significantly improved affinity and selectivity have been obtained and an anal. of the results has led to insights concerning the relation between the changes in ligand structure and selectivity as well as affinity to the protein.

Organic & Biomolecular Chemistry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics