Month: October 2022

Xiang, Jing; Ma, Lin; Gu, Zheng; Jin, Hongjun; Zhai, Hongbin; Tong, Jianfei; Liang, Tianjiao; Li, Juan; Ren, Qiushi; Liu, Qi published the artcile< A Boronated Derivative of Temozolomide Showing Enhanced Efficacy in Boron Neutron Capture Therapy of Glioblastoma>, Application In Synthesis of 112-63-0, the main research area is binary radiation therapy; boron delivery agents; boron neutron capture therapy; glioblastoma.

There is an incontestable need for improved treatment modality for glioblastoma due to its extraordinary resistance to traditional chemoradiation therapy. Boron neutron capture therapy (BNCT) may play a role in the future. We designed and synthesized a 10B-boronated derivative of temozolomide, TMZB. BNCT was carried out with a total neutron radiation fluence of 2.4 ± 0.3 x 1011 n/cm2. The effects of TMZB in BNCT were measured with a clonogenic cell survival assay in vitro and PET/CT imaging in vivo. Then, 10B-boronated phenylalanine (BPA) was tested in parallel with TMZB for comparison. The IC50 of TMZB for the cytotoxicity of clonogenic cells in HS683 was 0.208 mM, which is comparable to the IC50 of temozolomide at 0.213 mM. In BNCT treatment, 0.243 mM TMZB caused 91.2% ± 6.4% of clonogenic cell death, while 0.239 mM BPA eliminated 63.7% ± 6.3% of clonogenic cells. TMZB had a tumor-to-normal brain ratio of 2.9 ± 1.1 and a tumor-to-blood ratio of 3.8 ± 0.2 in a mouse glioblastoma model. BNCT with TMZB in this model caused 58.2% tumor shrinkage at 31 days after neutron irradiation, while the number for BPA was 35.2%. Therefore, by combining the effects of chemotherapy from temozolomide and radiotherapy with heavy charged particles from BNCT, TMZB-based BNCT exhibited promising potential for therapeutic applications in glioblastoma treatment.

Cells published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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

Wang, Qin; Yang, Meng; Yang, Ruisheng published the artcile< Synthesis of pentafluorophenyl acrylates>, Reference of 71195-85-2, the main research area is pentafluorophenyl acrylate preparation; acrylic acid pentafluorophenol condensation.

Pentafluorophenyl acrylates were synthesized for the first time via the condensation reaction of acrylic acids with pentafluorophenol by using N, N’- dicyclohexylcarbodiimide(DCC) as condensing agent, and good yields(74-81%) were obtained. The structures of products were confirmed by 1H NMR and ES-MS.

Huaxue Yanjiu Yu Yingyong published new progress about Aryl fluorides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 71195-85-2 belongs to class esters-buliding-blocks, and the molecular formula is C9H3F5O2, Reference of 71195-85-2.

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

Peralta Muniz Moreira, Rodrigo; Li Puma, Gianluca published the artcile< CFD modeling of pharmaceuticals and CECs removal by UV/H2O2 process in helical microcapillary photoreactors and evaluation of OH radical rate constants>, Computed Properties of 112-63-0, the main research area is CFD modeling pharmaceutical contaminants removal UV hydrogen peroxide process; helical microcapillary photoreactors evaluation hydroxyl radical rate constant.

Process intensification by tailored secondary flow in helical microcapillary film (MCF) photoreactors was unveiled by computational fluid dynamics, and it was revealed for the removal of six common contaminants of emerging concern CECs (the antiviral Acyclovir, the antiretrovirals Stavudine and Zidovudine, and the biocidal antifungal agents Methylisothiazolinone, Benzisothiazolinone and Isoxazole) in water by UV hydrogen peroxide. The MCF photoreactors consisted of fluoropolymer films containing 10 microchannels with diameter varying from 100 to 1000μm coiled around a UVC lamp. In contrast to a MCF with straight channels, mixing intensification by secondary flow (Dean vortices) caused by the helical shape of the microcapillary strongly enhanced the radial fluid mixing, further supplementing the transport of the reacting species by Taylor-Aris dispersion. The intensity of the Dean vortices formed was correlated to the Dean (De) and Schmidt (Sc) numbers through a new correlation for the radial Peclet, which established that these become significant when De1.94Sc > 67. Thus, the second-order reaction rate constant of the six CECs with OH• radicals (kOH) determined in a helical MCF photoreactor increased (4.4% up to 37.9%) in comparison to those determined assuming a MCF photoreactor with plug flow. In addition, the helical shape of the MCF significantly diminished mass transfer limitations and decreased the CECs Elec. Energy per Order Reduction (EEO), paving the way for scaling-up of helical microcapillary photoreactor technol. This study shows how micromixing can be successfully exploited to design more efficient microcapillary photoreactors.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Antiviral agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

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

Esen, Cem; Czulak, Joanna; Cowen, Todd; Piletska, Elena; Piletsky, Sergey A. published the artcile< Highly Efficient Abiotic Assay Formats for Methyl Parathion: Molecularly Imprinted Polymer Nanoparticle Assay as an Alternative to Enzyme-Linked Immunosorbent Assay>, HPLC of Formula: 3290-92-4, the main research area is abiotic determination format methyl parathion molecularly imprinted polymer nanoparticle.

ELISA is a widely used standard method for sensitive detection of analytes of environmental, clin., or biotechnol. interest. However, ELISA has clear drawbacks related to the use of relatively unstable antibodies and enzyme conjugates and the need for several steps such as washing of nonbound conjugates and addition of dye reagents. Herein, the authors introduce a new completely abiotic assay where antibodies and enzymes are replaced with fluorescent molecularly imprinted polymer nanoparticles (nanoMIPs) and target-conjugated magnetic nanoparticles, which acted as both reporter probes and binding agents. The components of the molecularly imprinted polymer nanoparticle assay (MINA) are assembled in microtiter plates fitted with magnetic inserts. The authors have compared the performance of a new magnetic assay with molecularly imprinted polymer (MIP)-based ELISA for the detection of methyl parathion (MP). Both assays showed high sensitivity toward allowing detection of MP at picomolar concentrations without any cross-reactivity against chlorpyriphos and fenthion. The fully abiotic assays were also proven to detect analyte in real samples such as tap water and milk. Unlike ELISA-based systems, the novel assay required no washing steps or addition of enzyme substrates, making it more user-friendly and suitable for high throughput screening.

Analytical Chemistry (Washington, DC, United States) published new progress about Drinking waters. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, HPLC of Formula: 3290-92-4.

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

Kawai, Junya; Ota, Masahiro; Ohki, Hitoshi; Toki, Tadashi; Suzuki, Makoto; Shimada, Takashi; Matsui, Satoshi; Inoue, Hidekazu; Sugihara, Chika; Matsuhashi, Norikazu; Matsui, Yumi; Takaishi, Sachiko; Nakayama, Kiyoshi published the artcile< Structure-Based Design and Synthesis of an Isozyme-Selective MTHFD2 Inhibitor with a Tricyclic Coumarin Scaffold>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is inhibitor isoenzyme selective SBDD tricyclic coumarin MTHFD2.

Methylenetetrahydrofolate dehydrogenase 2 (MTHFD2) plays a key role in one-carbon (1C) metabolism in human mitochondria, and its high expression correlates with poor survival of patients with various types of cancer. An isoenzyme-selective MTHFD2 inhibitor is highly attractive for potential use in cancer treatment. Herein, we disclose a novel isoenzyme-selective MTHFD2 inhibitor DS44960156, with a tricyclic coumarin scaffold, which was initially discovered via high-throughput screening (HTS) and improved using structure-based drug design (SBDD). DS44960156 would offer a good starting point for further optimization based on the following features: (1) unprecedented selectivity (>18-fold) for MTHFD2 over MTHFD1, (2) a mol. weight of less than 400, and (3) good ligand efficiency (LE).

ACS Medicinal Chemistry Letters published new progress about Drug design (structure-based drug design). 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

He, Hao; Zhang, Lei; Yue, Shizhong; Yu, Suzhu; Wei, Jun; Ouyang, Jianyong published the artcile< Enhancement in the Mechanical Stretchability of PEDOT:PSS Films by Compounds of Multiple Hydroxyl Groups for Their Application as Transparent Stretchable Conductors>, COA of Formula: C19H34O2, the main research area is PEDOT PSS film compound hydroxyl group transparent stretchable conductor.

It is of significance to develop stretchable conductors for flexible electronics. Although intrinsically conducting polymers like poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) can exhibit high conductivity, they have limited mech. stretchability because of the rigid conjugated backbone and strong interchain interaction. Here, we report the significant enhancement in the mech. stretchability of PEDOT:PSS films by adding a compound of two or more hydroxyl groups like glycerol, malic acid, 1,2,6-hexanetriol, or triethylene glycol. The elongation at break can be enhanced from <10% of pristine PEDOT:PSS films to >50%. The enhancement in the mech. stretchability is less significant when other compounds with only one hydroxyl or no hydroxyl group are used. The effect of the compounds with multiple hydroxyl groups on the stretchability of PEDOT:PSS is related to the Hansen solubility parameter (HSP) δh. A compound with a higher δh value can give rise to a more significant plasticization of PEDOT:PSS. The mechanism is attributed to the destruction of hydrogen bonds among the chains of poly(styrenesulfonic acid) (PSSH) by the compounds of multiple hydroxyl groups. This effectively lowers the interchain interaction among the PSSH and thus increases the mech. stretchability of PEDOT:PSS. Simultaneously, these compounds can induce secondary doping to saliently enhance the conductivity of PEDOT:PSS films. The highly stretchable and highly conductive PEDOT:PSS films can be used as transparent stretchable conductors.

Macromolecules (Washington, DC, United States) published new progress about Conducting polymers. 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

Corder, Ria D.; Gadi, Sashi V.; Vachieri, Robert B.; Jayes, Friederike L.; Cullen, John M.; Khan, Saad A.; Taylor, Darlene K. published the artcile< Using rheology to quantify the effects of localized collagenase treatments on uterine fibroid digestion>, Reference of 112-63-0, the main research area is collagenase treatment rheol uterine fibroid digestion; Collagenase; Drug delivery; Histology; Rheology; Uterine fibroids.

Uterine fibroids are stiff, benign tumors containing excessive, disordered collagens that occur in 70-80% of women before age 50 and cause bleeding and pain. Collagenase Clostridium histolyticum (CCH) is a bacterial enzyme capable of digesting the collagens present in fibroids. By combining CCH with injectable drug delivery systems to enhance effectiveness, a new class of treatments could be developed to reduce the stiffness of fibroids, preventing the need for surgical removal and preserving fertility. In this work, we achieved localization of CCH via phys. entrapment by co-injecting a thermoresponsive pNIPAM-based polymeric delivery system called LiquoGel (LQG), which undergoes a sol-gel transition upon heating. Toxicity study results for LQG injected s.c. into mice demonstrate that LQG does not induce lesions or other adverse effects. We then used rheol. to quantify the effects of localized CCH injections on the modulus and viscoelasticity of uterine fibroids, which exhibit gel-like behavior, through ex vivo and in vivo digestion studies. Ex vivo CCH injections reduce the tissue modulus by over two orders of magnitude and co-injection of LQG enhances this effect. Rheol. results from an in vivo digestion study in mice show a significant reduction in tissue modulus and increase in tissue viscoelasticity 7 days after a single injection of LQG+CCH. Parallel histol. staining validates that the observed rheol. changes correspond to an increase in collagen lysis after treatment by LQG+CCH. These results show promise for development of injectable and localized enzymic therapies for uterine fibroids and other dense tumors. Uterine fibroids are stiff, benign tumors containing high collagen levels that cause bleeding and pain in women. Fertility-preserving and minimally-invasive treatments to soften fibroids are needed as an alternative to surgical removal via hysterectomy. We demonstrate through ex vivo and in vivo studies that co-injecting a thermoresponsive polymer delivery system (LQG) alongside a bacterial collagenase (CCH) enzyme significantly increases treatment effectiveness at softening fibroids through CCH localization. We use rheol. to measure the modulus and viscoelasticity of fibroids and histol. to show that fibroid softening corresponds to a decrease in collagen after treatment with LQG+CCH. These results highlight the utility of rheol. at quantifying tissue properties and present a promising injectable therapy for fibroids and other dense tumors.

Acta Biomaterialia published new progress about Biological digestion. 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

Canale, Vittorio; Kotanska, Magdalena; Dziubina, Anna; Stefaniak, Matylda; Siwek, Agata; Starowicz, Gabriela; Marciniec, Krzysztof; Kasza, Patryk; Satala, Grzegorz; Duszynska, Beata; Bantreil, Xavier; Lamaty, Frederic; Bednarski, Marek; Sapa, Jacek; Zajdel, Pawel published the artcile< Design, Sustainable Synthesis and Biological Evaluation of a Novel Dual α2A/5-HT7 Receptor Antagonist with Antidepressant-Like Properties>, Related Products of 112-63-0, the main research area is dihydrobenzofuranoxy ethyl piperidine preparation antidepressant activity green chem SAR; 5-HT7 receptor antagonist; depression; forced swim test; medicinal mechanochemistry; α2 adrenoceptor antagonist.

The complex pathophysiol. of depression, together with the limits of currently available antidepressants, has resulted in the continuous quest for alternative therapeutic strategies. Numerous findings suggest that pharmacol. blockade ofα2-adrenoceptor might be beneficial for the treatment of depressive symptoms by increasing both norepinephrine and serotonin levels in certain brain areas. The antidepressant properties of 5-HT7 receptor antagonists have been widely demonstrated in a large set of animal models. Considering the potential therapeutic advantages in targeting both α2-adrenoceptors and 5-HT7 receptors, a small series of arylsulfonamide derivatives of (dihydrobenzofuranoxy)ethyl piperidines I (Ar = 4-fluorophenyl, naphthalen-1-yl, isoquinolin-4-yl, etc.; m = 0,1) as dually active ligands were designed. Following green chem. principles, the designed compounds were synthesized entirely using a sustainable mechanochem. approach. The identified compound I (Ar = 5-chloro-2-fluorophenyl (II)) behaved as a potent α2A/5-HT7 receptor antagonist and displayed moderate-to-high selectivity over α1-adrenoceptor subtypes and selected serotonin and dopaminergic receptors. Finally, (II) improved performance of mice in the forced swim test, displaying similar potency to the reference drug mirtazapine.

Molecules published new progress about 5-HT antagonists. 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

Farnier, M.; Drakenberg, T. published the artcile< Nuclear magnetic resonance conformational studies of C-substituted formylpyrroles. I. Substituent effects on aldehyde conformations as shown by long range coupling constants>, HPLC of Formula: 7126-50-3, the main research area is formylpyrrole conformation NMR; pyrrole formyl conformation NMR; substituent effect conformation formylpyrrole; solvent effect conformation formylpyrrole.

The substituent effects on the conformation of the CHO group of 2- and 3-formylpyrroles and their NO2, I, EtO2C, and CHO derivatives were studied by measuring the 5J and 4J long-range coupling constants The solvent effect was also studied for several mols., increasing polarity of the solvent causing an increase in the proportion of trans conformer. This was probably due to a reduction in intramol. H bonding between NH and CO relative to intermol. interactions.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about Formyl group. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, HPLC of Formula: 7126-50-3.

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

Press, Loren P.; Kosanovich, Alex J.; McCulloch, Billy J.; Ozerov, Oleg V. published the artcile< High-Turnover Aromatic C-H Borylation Catalyzed by POCOP-Type Pincer Complexes of Iridium>, HPLC of Formula: 112-63-0, the main research area is borylation arene pinacolate iridium pincer complex catalyst mechanism; crystal structure mol iridium pincer complex preparation borylation catalyst.

The catalytic C-H borylation of arenes with HBpin (pin = pinacolate) using POCOP-type pincer complexes of Ir has been demonstrated, with turnover numbers exceeding 10,000 in some cases. The selectivity of C-H activation was based on steric preferences and largely mirrored that found in other Ir borylation catalysts. Catalysis in the (POCOP)Ir system depends on the presence of stoichiometric quantities of sacrificial olefin, which is hydrogenated to consume the H2 equivalents generated in the borylation of C-H bonds with HBpin. Smaller olefins such as ethylene or 1-hexene were more advantageous to catalysis than sterically encumbered tert-butylethylene (TBE). Olefin hydroboration is a competing side reaction. The synthesis and isolation of multiple complexes potentially relevant to catalysis permitted examination of several key elementary reactions. These experiments indicate that the C-H activation step in catalysis ostensibly involves oxidative addition of an aromatic C-H bond to the three-coordinate (POCOP)Ir species. The olefin is mechanistically critical to gain access to this 14-electron, monovalent Ir intermediate. C-H activation at Ir(I) here is in contrast to the olefin-free catalysis with state-of-the-art Ir complexes supported by neutral bidentate ligands, where the C-H activating step is understood to involve trivalent Ir-boryl intermediates.

Journal of the American Chemical Society published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 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