Tag: M.W=250-300

Pandey, Ganash; Das, Parthasarathi; Reddy, P. Yella published the artcile< Photoinduced electron transfer (PET) promoted oxidative activation of 1-(N-benzyl-N-methylglycyl)-(S)-prolinol: development of novel strategies towards enantioselective syntheses of α-amino acids, their N-methyl derivatives and α-hydroxy acids employing (S)-prolinol as a recyclable chiral auxiliary>, COA of Formula: C19H34O2, the main research area is amino hydroxy acid preparation enantioselective cyclization photolysis alkylation hydrolysis; prolinol chiral auxiliary preparation amino hydroxy acid.

PET activation of 1-(N-benzyl-N-methylglycyl)-(S)-prolinol (I) in dry acetonitrile, utilizing 1,4-dicyanonaphthalene (DCN) as a light-harvesting electron-acceptor and Me viologen (MV++) as an electron-transfer mediator, leads to the formation of 3-[benzyl(methyl)amino]perhydropyrrolo-[2,1-c][1,4]oxazin-4-one (II). When this photolysis is carried out in aqueous acetonitrile, exclusively 3-hydroxy-perhydropyrrolo[2,1-c][1,4]oxazin-4-one (III) is produced. The formation of II can be rationalized in terms of intramol. cyclization of the in situ generated iminium cation intermediate (IV) by the OH moiety of (S)-prolinol, while III is generated by hydrolysis of IV followed by acetalization. Nucleophilic alkylation of II and III, using Grignard reagents and allyltrimethylsilane/TiCl4, provides amides in a highly stereoselective manner. Hydrolysis of the resultant amides provides α-amino acid derivatives and α-hydroxy acids, resp., in optically active form, along with the recovered (S)-prolinol chiral auxiliary in its recyclable form.

European Journal of Organic Chemistry published new progress about Alkylation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Arimoto, Hirokazu; Shimano, Toshihisa; Uemura, Daisuke published the artcile< Concise Synthesis of the Plant Growth Regulator Theobroxide>, Electric Literature of 112-63-0, the main research area is theobroxide preparation dihydrotoluene plant growth regulator; lipase resolution theobroxide preparation.

A plant growth regulator, theobroxide (I), which produces potato tubers under noninduced long-day conditions, was synthesized in four steps from dihydrotoluene.

Journal of Agricultural and Food Chemistry published new progress about Enzymic resolution. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Zhang, Wenguo; Zou, Xiaobin; Liu, Xiaoli; Liang, Zhu; Ge, Zhen; Luo, Yunjun published the artcile< Preparation and properties of waterborne polyurethane modified by aminoethylaminopropyl polydimethylsiloxane for fluorine-free water repellents>, Category: esters-buliding-blocks, the main research area is aminoethylaminopropyl polydimethylsiloxane modified waterborne polyurethane preparation water repellency property.

Waterborne polyurethane (WPU) prepolymers were firstly synthesized by toluene diisocynate (TDI), trimethylolpropane (TMP), polydimethylsiloxane (PDMS), N-methyldiethanolamine (N-MDEA) and glycerin monostearate (GMS). Then the prepolymers were chain-extended by aminoethylaminopropyl polydimethylsiloxane (AEAPS) to obtain fluorine-free water repellents. In this paper, the structure of AEAPS-modified waterborne polyurethane (AEWPU) was characterized, and the influence of different AEAPS contents on stability, particle size and viscosity of AEWPU, the waterproof performance, surface energy, contact-angle hysteresis and morphol. of the AEWPU films. The application properties of the fabrics finished by AEWPU, the elements distribution of the film and the finished fabric were also discussed. The optimum AEAPS content of the water repellent was 20 wt%, then the highest score of 90+ was obtained.

Progress in Organic Coatings published new progress about Absorption (water). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Krueger, Bastian; Ruecker, Konstantin Kimon; Wittstock, Gunther published the artcile< Redox Mediators for Faster Lithium Peroxide Oxidation in a Lithium-Oxygen Cell: A Scanning Electrochemical Microscopy Study>, Electric Literature of 112-63-0, the main research area is lithium peroxide oxidation kinetics redox mediator lithium oxygen battery.

The reoxidation of Li2O2 as a discharge product of a Li-O2 cell occurs with high overpotential at the three-phase boundary between the electron conductor of the pos. gas-diffusion electrode, the organic electrolyte, and solid Li2O2. Indirect oxidation of Li2O2 by means of redox mediators is a way to overcome the high overpotential of this reaction, decrease the formation of reactive oxygen species, and convert the entire amount of Li2O2 formed during the discharge step. The rate constants of the redox reaction between oxidized mediators and solid Li2O2 were determined for five organic redox mediators in two glyme electrolytes and two electrolytes based on ionic liquids Specifically, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO), 1,2,4,5-tetramethoxybenzene (TMB), 2,5-di-tert-butyl-1,4-dimethoxybenzene (DBDMB), 2,2′-bis(1,3-dithiolylidene) (TTF), and N-methylphenothiazine (MPT) were used in electrolytes based on 1-methoxy-2-(2-methoxyethoxy)ethane (diglyme) and 1-methoxy-2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethane (tetraglyme) as well as in the ionic liquids 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm]TFSI) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Py1,4]TFSI). The suitability of the method was carefully evaluated. The highest rate constant was found for DBDMB in diglyme. TTF showed the lowest rate constant in all tested electrolytes. The rate constants of all mediators in ionic liquids are at least 1 order of magnitude lower than in the ether-based electrolytes although the viscosity of [EMIm]TFSI is comparable to that of tetraglyme. This must be considered when devising Li-O2 cells with such nonvolatile electrolytes.

ACS Applied Energy Materials published new progress about Battery electrolytes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Ohkita, Masakazu; Sano, Kieko; Ono, Katsuhiko; Saito, Katsuhiro; Suzuki, Takanori; Tsuji, Takashi published the artcile< Kinetic stabilization of the o-quinoidal 3,4-benzotropone system>, Electric Literature of 112-63-0, the main research area is kinetic stabilization quinoidalbenzotropone.

Kinetic stabilization of the o-quinoidal 3,4-benzotropone system was investigated. The parent 3,4-benzotropone 1 undergoes rapid [π8 + π10] dimerization in fluid solution even at -78 °C while triptycene-fused derivative 5 having a tert-Bu group at the C(6) position of the tropone moiety was found to be stable indefinitely under similar conditions. The relative importance of the triptycene moiety and the tert-Bu group in 5 for the kinetic stabilization was evaluated.

Organic & Biomolecular Chemistry published new progress about Dimerization kinetics. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Wu, Dudu; Ye, Xiaomei; Yuan, Kangrui; Liu, Wei; Liu, Kun; Xie, Yuling; Huang, Chaobo; Yu, Zhiqiang; Chen, Zhi published the artcile< Fluorescence spectroscopy based on ZnSe quantum dots to detect berberine>, HPLC of Formula: 112-63-0, the main research area is zinc selenium quantum dot berberine fluorescence spectroscopy.

The bovine serum albumin (BSA)-modified ZnSe quantum dots (QDs) possessed water solubility were applied in determining berberine within water solutions by fluorescence spectroscopy. According to our findings, the mean size of those synthesized QDs was approx. 12 nm, as verified through X-ray diffraction (XRD), nanoparticle size anal. and transmission electron microscopy (TEM). Besides, berberine within physiol. buffer solution was used to markedly quench fluorescence intensity for those as-modified ZnSe QDs, with the best value being achieved after 10 min of incubation at 25°C and pH 7.0. At the most suitable conditions, berberine showed the limit of detection (LOD) of 5.27 x 10-7 mol·L-1. Addnl., the quenching mechanism was also examined, which was suggested as the static quenching process, as certified via constant quenching rate Kq (3.28 x 1013 L · mol-1·s-1).

Materials Express published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Foroutan, Zahra; Afshari, Amir Reza; Sabouri, Zahra; Mostafapour, Asma; Far, Bahareh Farasati; Jalili-Nik, Mohammad; Darroudi, Majid published the artcile< Plant-based synthesis of cerium oxide nanoparticles as a drug delivery system in improving the anticancer effects of free temozolomide in glioblastoma (U87) cells>, HPLC of Formula: 112-63-0, the main research area is cerium oxide green synthesis drug delivery Caccinia macranthera.

Nowadays, nanocarriers were proven to contain the potential of improving cancer treatments and are utilized to carry anticancer medications to tumors. In this study, cerium oxide nanoparticles (CeO2-NPs) were synthesized by using Caccinia macranthera leaf extract as the stabilizer and reducer agent, as well as cerium nitrate salt as the supplier source of cerium. The synthesized CeO2-NPs were analyzed through different procedures such as UV-Vis, FTIR, FESEM/EDX/PSA, XRD, XPS, and TGA/DTA. The outcomes of XRD and FTIR analyses confirmed the synthesis of pure and crystalline structures of CeO2-NPs. The average size and zeta potential of our nanoparticles were about 30 nm and -18.5 mV, resp. According to the results of XPS anal., the percentage of Ce4+ was more than that of the Ce3+ oxidation state in synthesized NPs. The CeO2-NPs were loaded with Temozolomide (TMZ) as an anti-cancer drug through electrostatic interaction and the produced nano-drug (CeO2-TMZ) was delivered to glioblastoma multiforme (GBM) tumor cells. In conformity to the observations, the drug loading content (DLC) and drug loading efficiency (DLE) of CeO2-TMZ were about 89.10 and 20.29, resp. In comparison to the TMZ drug, the in vitro assay exhibited the exertion of higher antiproliferative activities, cell cycle arrest, apoptosis, and expression of p53 by CeO2-TMZ, which proves the promising capability of this drug as a remedial factor for cancer treatment.

Ceramics International published new progress about Apoptosis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Saetiao, Phonsan; Rattanawilai, Sukritthira; Photaworn, Songtham; Prasertsit, Kulchanat published the artcile< Using reactive distillation for upgrading bio-oil from co-pyrolysis of palm kernel shell and palm empty fruit bunches>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is biooil copyrolysis palm kernel shell fruit reactive distillation.

Due to the poor phys. properties of raw bio-oil from pyrolysis, in this work reactive distillation was used to upgrade vaporized bio-oil from selected co-pyrolysis of palm kernel shell and palm empty fruit bunches at 75%/25% mixing ratio by using 10%Ni/HZSM-5 catalyst and ethanol at various reboiler temperatures In the pyrolysis process, the feed temperature (biooil vapor and non-condensable gas) was in the range between 35 and 230°C. The reboiler temperature not only influenced the separation of heavy oil from raw bio-oil, which would help minimize catalyst deactivation, but also possibly affected contact time of reactants with catalyst via the residence time. The vaporized bio-oil was upgraded by esterification and acetalization reactions producing levulinic acid Et ester, nonanoic acid Et ester, and 1,1-diethoxyethane. The phys. characteristics d., kinematic viscosity, water content, and pH were improved from those of the raw bio-oil.

Songklanakarin Journal of Science and Technology published new progress about Acetalization. 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

Dopp, Dietrich published the artcile< Preparation of 4-(N,N-dihexylamino)-4'-nitrostilbene (DHANS)>, Related Products of 112-63-0, the main research area is NLO dye stilbene derivative preparation.

A rational preparation of the NLO dye (E)-4-(N,N-dihexylamino)-4′-nitrostilbene (DHANS), using adapted standard procedures, is described. DHANS has been for the first time fully characterized by elemental anal. and spectroscopic data.

ARKIVOC [online computer file] published new progress about Nonlinear optical materials. 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

Zhou, Jianrong; Hartwig, John F. published the artcile< Intermolecular, Catalytic Asymmetric Hydroamination of Bicyclic Alkenes and Dienes in High Yield and Enantioselectivity>, SDS of cas: 112-63-0, the main research area is alkene diene strained bicyclic enantioselective hydroamination aniline iridium catalyst; norbornane arylamino stereoselective preparation ozonolysis ring opening metathesis; cyclopentane amino stereoselective preparation.

A set of catalytic, intermol. hydroaminations of strained bicyclic olefins and dienes are reported that occur in both high yield and high enantioselectivity. These reactions occur with a catalyst generated from [Ir(cyclooctene)2Cl]2, sterically hindered and electron-rich derivatives of the Segphos (I, R1 = Ph, 3,5-diMeC6H3, 3,5-di-tert-butyl-4-methoxyphenyl) and BIPHEP (II R2 = R1, 3,4,5-trimethoxyphenyl) families of ligands, and a soluble base. This system catalyzes the addition of various anilines to norbornene, norbornadiene, and other bicyclic olefins. The products from addition of p-anisidine can be transformed to BOC-protected norbornylamine and to substituted cyclopentanes in nearly enantiopure form. Mechanistic studies show that addition of aniline-d2 occurs in a syn fashion and suggest that the catalytic cycle comprises oxidative addition of aniline to form a bis-anilide hydride complex, followed by migratory insertion of olefin and reductive elimination of product in a series of steps involving iridium complexes containing ancillary bisphosphine and arylamide ligands.

Journal of the American Chemical Society published new progress about Aromatic amines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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