Tag: M.W=250-300

Ishida, Atsushi; Shichi, Hiroki; Fukuoka, Hidenori; Inoshita, Naoko; Ogawa, Wataru; Yamada, Shozo published the artcile< Efficacy of temozolomide combined with capecitabine (CAPTEM) on refractory prolactinomas as assessed using an ex vivo 3D spheroid assay>, HPLC of Formula: 112-63-0, the main research area is refractory prolactinoma temozolomide capecitabine prolactin cell viability; 3D spheroid culture; CAPTEM; Capecitabine; MGMT; Refractory prolactinoma; Temozolomide.

Purpose: Refractory prolactinomas resistant to dopamine agonists (DAs) pose a clin. challenge. Temozolomide (TMZ) is a recommended treatment option, but its effects are difficult to predict, and the alternatives are limited. Recent reports suggested that TMZ combined with capecitabine (CAPTEM) can be effective for the treatment of aggressive pituitary tumors. This study sought to evaluate the effect of TMZ in an ex vivo three-dimensional (3D) spheroid culture assay and determine if this assay could be used to predict the therapeutic effect of CAPTEM in actual refractory prolactinomas. Methods: Surgically resected tumor tissues from two patients with refractory prolactinoma were cultured as 3D spheroids. The effects of TMZ were assessed based on its suppression of cell viability and reduction of prolactin (PRL) levels. Results: In Case 1, the 3D culture assay showed no effect of TMZ on cell viability or PRL suppression. Clin., TMZ treatment did not reduce PRL levels (8870é–?274 ng/mL) and the tumor progression. However, CAPTEM partially reduced PRL levels (9070é–?046 ng/mL) and suppressed the tumor growth. In Case 2, TMZ in the 3D culture assay showed a 50redn. of cell viability and 40redn. of PRL levels. Clin., CAPTEM was highly effective, with a considerable reduction in PRL level (17,500é–?10 ng/mL), and MRI showed almost no residual tumor. Conclusions: This is the first report to describe the effects of CAPTEM treatment on refractory prolactinomas. The ex vivo 3D spheroid culture assay reliably predicted TMZ sensitivity and informed the selection between TMZ or CAPTEM treatment for refractory prolactinomas.

Pituitary published new progress about Antitumor agents. 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

Graf, Roderich published the artcile< 2-Methyl-5-aminopyridine and its derivatives>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is .

Details are given of the preparation of aldehydocollidine (Ger. pat. 349,184) and its oxidation to 6-methylnicotinic acid (1). The HCl salt of I and SOCl2 do not react below the b. p. of the SOCl2; at the b. p. there results an intensely green-reddish brown dye; MeOH-HCl gives the Me ester of I, m. 32� the ester seps. on warming the aqueous solution as an oil; Et ester, b15 130� b. 222-4�(slight decomposition); amide, m. 194� hydrazide (II), m. 134-5�(benzal derivative, m. 184-5� o-chlorobenzal derivative, m. 183-4� vanillal derivative, m. 245-60�; II and KNO: in N HCl give the azide (III), m. 44-5� and sec-bis(6-metkylnicotinic acid) hydraside, m. 247-50� III and PhNH2 in Et2O give the anilide of I, m. 134-7� 2-methyl-5-aminopyridine and III give N-(6-methyl-3-pyridoyl)-6-methyl-3-aminopyridine, m. 275-7�(decomposition). Boiling III in absolute EtOH gives 2-methyl-5-carbethoxyaminopyridine, m. 132-3� while boiling H2O gives sym-bis(2-methyl-5-pyridoyl)urea, m. 285-8�(decomposition); heating the latter with concentrated HCl at 130�for 10 hrs. gives 2-methyl-5-aminopyridine (IV), m. 95-6� heating III in dilute AcOH gives only a poor yield of IV; the amide (40 g.) and NaOCl give 18 g. VI. The di-HCl salt of IV m. 215-8�(decomposition); Ac derivative, m. 122-3� Bz derivative, m. 110-1� IV, through the diazo solution, gives the 5-Cl derivative, b. 163� m. 19� oxidation gives 5-chloropyridine-2-carboxylic acid, crystals with 1 mol. H2O, m. 169-70� chloride, m. 94� Me ester, m. 85-7� Ph ester, m. 92� amide, m. 200-1� 2-Methyl-5-bromopyridine, m. 32� 5-bromopyridine-2-carboxylic acid, m. 175� 2-Methyl-5-iodopyridine, m. 48-9� HI salt, m. 235-8� 5-iodopyridine-2-carboxylic acid, m. 188-90� 2-Methyl-5-hydroxypyridine, m. 165-7�

Journal fuer Praktische Chemie (Leipzig) published new progress about History. 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

Uludag, Ahsen Akbulut; Erses Yay, Aliye Suna published the artcile< Life Cycle Analysis of Lithium-Air Batteries Designed with TEGDME-LiPF6/PVDF Aprotic Electrolytes>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is life cycle assessment lithium air battery aprotic electrolyte.

In this study, possible environmental effects of lithium-air battery production and use in elec. vehicles are studied using life cycle assessment (LCA). TEGDME + LiPF6/1% wt PVDF electrolyte is selected, and 0.5% wt Al2O3 and 0.5% wt SiO2 nanoparticles are added sep. to this electrolyte. The batteries are produced and tested under laboratory conditions, and 25 kW h power packs are modeled with different electrolytes. A functional unit “”environmental impact per 1 km”” is chosen. The battery modeled with 0.5% wt SiO2 added electrolyte has a low global warming potential (GWP) of 83.5 g CO2-eq/km. Because of the low energy potential, the 0.5% wt Al2O3 added battery exhibits the highest GWP at 158 g CO2-eq/km. It is determined that the environmental effects of batteries are largely due to the high elec. energy needed during the cathode production for the battery cell. While the GWP of a 1% wt poly(vinylidene difluoride) (PVDF) battery is caused by 68.4% of the battery production process, this ratio is 93.3% for 0.5% wt Al2O3 added battery. It is determined that the lithium-air battery technol. has lower emission values than internal combustion engines operating with fossil fuels.

ACS Sustainable Chemistry & Engineering published new progress about Battery electrolytes. 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

Takrouri, Khuloud; Cooper, Harold D.; Spaulding, Adnrew; Zucchi, Paula; Koleva, Bilyana; Cleary, Dillon C.; Tear, Westley; Beuning, Penny J.; Hirsch, Elizabeth B.; Aggen, James B. published the artcile< Progress against Escherichia coli with the Oxazolidinone Class of Antibacterials: Test Case for a General Approach To Improving Whole-Cell Gram-Negative Activity>, Synthetic Route of 112-63-0, the main research area is Escherichia oxazolidinone antibacterial gram neg permeation; Gram-negative; efflux pump; outer membrane permeability; oxazolidinones; porins.

Novel antibacterials with activity against the Gram-neg. bacteria associated with nosocomial infections, including Escherichia coli and other Enterobacteriaceae, are urgently needed due to the increasing prevalence of multidrug-resistant strains. A major obstacle that has stalled progress on nearly all small-mol. classes with potential for activity against these species has been achieving sufficient whole-cell activity, a difficult challenge due to the formidable outer membrane and efflux barriers intrinsic to these species. Using a set of compound design principles derived from available information relating physicochem. properties to Gram-neg. entry or activity, we synthesized and evaluated a focused library of oxazolidinone analogs, a currently narrow spectrum class of antibacterials active only against Gram-pos. bacteria. In this series, we have explored the effectiveness for improving Gram-neg. activity by identifying and combining beneficial structural modifications in the C-ring region. We have found polar and/or charge-carrying modifications that, when combined in hybrid C-ring analogs, appear to largely overcome the efflux and/or permeability barriers, resulting in improved Gram-neg. activity. In particular, those analogs least effected by efflux and the permeation barrier had significant zwitterionic character.

ACS Infectious Diseases published new progress about Antibiotics. 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

Desroy, Nicolas; Denis, Alexis; Oliveira, Chrystelle; Atamanyuk, Dmytro; Briet, Sophia; Faivre, Fabien; LeFralliec, Geraldine; Bonvin, Yannick; Oxoby, Mayalen; Escaich, Sonia; Floquet, Stephanie; Drocourt, Elodie; Vongsouthi, Vanida; Durant, Lionel; Moreau, Francois; Verhey, Theodore B.; Lee, Ting-Wai; Junop, Murray S.; Gerusz, Vincent published the artcile< Novel HldE-K Inhibitors Leading to Attenuated Gram Negative Bacterial Virulence>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is protein kinase HldE inhibitor optimization antibacterial Escherichia virulence attenuation.

The optimization of an HldE kinase inhibitor to low nanomolar potency is reported here, which resulted in the identification of the first reported compounds active on selected Escherichia coli strains. One of the most interesting candidates, compound 86, was shown to inhibit specifically bacterial LPS heptosylation on efflux pump deleted E. coli strains. This compound did not interfere with E. coli bacterial growth (MIC > 32 娓璯/mL) but sensitized this pathogen to hydrophobic antibiotics like macrolides normally inactive on Gram-neg. bacteria. In addition, 86 could sensitize E. coli to serum complement killing. These results demonstrate that HldE kinase is a suitable target for drug discovery. They also pave the way toward novel possibilities of treating or preventing bloodstream infections caused by pathogenic Gram-neg. bacteria by inhibiting specific virulence factors.

Journal of Medicinal Chemistry published new progress about Antibacterial agents. 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

Sumiya, Tomio; Ishigaki, Mai; Oh, Keimei published the artcile< Synthesis of imidazole and indole hybrid molecules and antifungal activity against rice blast>, HPLC of Formula: 112-63-0, the main research area is Magnaporthe rice blast imidazole indole hybrid mol antifungal.

Azole and indole are parent substances of many natural and synthetic compounds with significant biol. activity. However, the biol. activity of the indole and azole conjugates are lack of investigation. In the present work, a series of hybrid mols. with imidazole and indole moiety were designed by using camalexin as a mol. scaffold. Compounds with different length of the carboxylic acid (4a-4f) were prepared The antifungal activity of this synthetic series together with the Et esters analogs (3a-3f) against Magnaporthe oryzae were determined by using agar cup plate assay. Data obtained from the structure-activity relationship studies indicated that the ester analogs displayed antifungal activity against Magnaporthe oryzae while the carboxylic acid derivatives did not. This result indicated that the carboxylic acid Et ester moiety is important to antifungal activity. Among all the synthesized compounds, we found that, at a concentration of 100 娓璏, compound 3c displays the most potent inhibition activity with 38.8 é?2.5% on the inhibition of the diameter of the mycelial mat of Magnaporthe oryzae while the pos. control of propiconazole (10 娓璏) was found 39.3 é?2.9%.

International Journal of Chemical Engineering and Applications published new progress about Fungicides. 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

Chithra, P. A.; Darbha, Srinivas published the artcile< Catalytic conversion of HMF into ethyl levulinate - A biofuel over hierarchical zeolites>, Synthetic Route of 112-63-0, the main research area is hydroxymethyl furfuraldehyde conversion ethyl levulinate biofuel zeolite catalyst.

Catalytic conversion of 5-hydroxymethyl-2-furfuraldehyde (HMF, a biomass-derived platform chem.) into Et levulinate (EL) is an attractive approach for producing renewable transport fuels for mitigating global warming. The application is reported of hierarchical zeolites (DZSM-5 and MZSM-5 synthesized by desilication and mesoporous templating approaches, resp.) as solid acid catalysts for this transformation. Hierarchical structure of these zeolites was confirmed by X-ray diffraction, nitrogen-physisorption and electron microscopy, and acidity was determined by temperature-programmed desorption of ammonia. The HMF conversion of 94.2% with EL selectivity of 90.8% was achieved over the MZSM-5 catalyst. Acidity, pore size, and surface properties affected the catalytic activity.

Catalysis Communications published new progress about Biofuels. 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

Lv, Leiyang; Lu, Shenglin; Chen, Yuanjin; Li, Zhiping published the artcile< Diastereoselective building up polycyclic tetrahydrofurans via tandem annulation of 1,n-enynes with aliphatic acids>, Quality Control of 112-63-0, the main research area is quinolinyl polycyclic THF diastereoselective preparation crystal structure mol; aniline linked enyne aliphatic acid tandem annulation silver catalyst.

A silver-catalyzed tandem annulation of aniline-linked 1,7-enynes with aliphatic acids was reported. This synergistic tandem annulations allowed the straightforward and efficient building up various highly diastereoselective polycyclic tetrahydrofurans. Primary and secondary acids underwent decarboxylation/cascade radical addition/�C(sp3)-H cleavage/cycloalkylation/O-trapping to generate oxygenous [6.6.6.5] fused products I [R = H, Me, F; R1 = Ac, Ms, SO2Ph, Ts, Bs; R2 = CO2Me, CO2Et, CO2t-Bu; n = 0,1] and II [R3 = R4 = H, Et; R3R4 = (CH2)2, (CH2)3, (CH2)OCH2, etc.]. While tertiary acids underwent decarboxylation/cascade radcial addition/�C(sp3)-H cleavage/O-trapping to give oxygenous [6.6.6.6] fused products III [R1 = Me, Ms, SO2Ph, Ts, Bs; R2 = Me, CO2Me, CO2Et, CO2t-Bu; R3 = H, Me; X = CH2, C=O].

Organic Chemistry Frontiers published new progress about Aliphatic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Wu, Changchun; Yu, Xiaobo; Wang, Baolei; Liu, Jingbo; Meng, Fanfei; Zhao, Yangyang; Xiong, Lixia; Yang, Na; Li, Yuxin; Li, Zhengming published the artcile< Synthesis, insecticidal evaluation and 3D-QASR of novel anthranilic diamides derivatives containing N-arylpyrrole as potential ryanodine receptor activators>, HPLC of Formula: 112-63-0, the main research area is phenylcarboamyl chlorophenyl pyrrolyl carboxamide preparation larvicide SAR HOMO LUMO; pyridinylpyrrolyl carbamoylphenyl carboxamide preparation larvicide SAR HOMO LUMO; CoMFA; DFT; calcium imaging technique; insecticidal activity; pyrrole; ryanodine receptors.

The synthesis of novel anthranilic diamides derivatives I [R = HC, N, Cl-C; R4 = O2N, F3C, i-Pr, etc; R5 = Me, i-Pr] incorporating pyrrole moiety targeting at insect RyRs. The structures I were confirmed by 1H NMR, 13C NMR, 19F NMR and HRMS. The preliminary bioassay results indicated that most of the title compounds I showed good to excellent insecticidal activities against oriental armyworm (Mythimna separata) and diamondback moth (Plutella xylostella). For oriental armyworm, I [R = N; R4 = H; R5 = Me] displayed the same level of larvicidal activity as the pos. control chlorantraniliprole, with the LC50 value of 0.21 mg/L. For diamondback moth II [R5 = Me; X = Br], [R5 = i-Pr; X = Br], [R5 = Me; X = Cl] and [R5 = i-Pr; X = Cl] exhibited higher insecticidal activities than chlorantraniliprole. In particular, In had 50% larvicidal activity at 0.00001 mg/L. Calcium imaging technique was applied to study the effect of I [R = N; R4 = H; R5 = Me] and II [R5 = Me; X = Br, Cl] on the intracellular calcium ion concentration ([Ca2+]i) in central neurons isolated from oriental armyworm. The results indicated that the tested compoundsI and II, like chlorantraniliprole was activate the insect ryanodine receptors. Furthermore, comparative mol. field (CoMFA) anal. and d. functional theory (DFT) calculations were carried out to study the structure-activity relationship (SAR).

Journal of Agricultural and Food Chemistry published new progress about Amides Role: AGR (Agricultural Use), BSU (Biological Study, Unclassified), SPN (Synthetic Preparation), BIOL (Biological Study), USES (Uses), PREP (Preparation). 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

Jia, Shuangzhu; Li, Changan; Pan, Hongyan; Wang, Meng; Wang, Xianshu; Lin, Qian published the artcile< Preparation and pore-forming mechanism of hydrogen bond and ionic bond double-driven chitosan-based mesoporous carbon>, Electric Literature of 112-63-0, the main research area is chitosan based mesoporous carbon preparation hydrogen ionic bond adsorption; Chitosan; Hydrogen bond and ionic bond; Mesoporous carbon; Sol-hydrothermal method; Synergistic preparation; Tannic acid.

Using chitosan as the carbon source, F127 as the template, and sodium tripolyphosphate as crosslinking agent, a hydrogen bond and ionic bond double-driven mesoporous carbon material was prepared via the sol-hydrothermal method and its formation mechanism was discussed. According to the results from FTIR, Raman, XPS, phys. adsorption analyzer, SEM, TEM, and TG-IR, the mesoporous carbon material was formed under the synergistic effect of hydrogen bond and ionic bond has a mesoporous volume of 0.44 cm3/g, a BET surface area of 262 m2/g, and possesses the ideal unimodal distribution around 2.20 nm. The mesopores are originated from the degradation of hydrophobic segment PPO of F127, and the micropores come from the gases CO2, CO, NH3, CH4, tetraethylene glycol di-Me ether, and 2,6-diisopropylphenyl isocyanate produced during the degradation of prepolymers. The maximum adsorption capacity of this mesoporous carbon for tannic acid (Sips model) at 30 鎺矯 is 70.4 mg/g.

International Journal of Biological Macromolecules published new progress about Adsorption. 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