Tag: M.W=250-300

Liu, Xinhua; Wang, Youyou; Wang, Xuechuan; Han, Tengfei; Wang, Wanni; Jiang, Huie published the artcile< A salt-free pickling and chrome-free tanning technology: a sustainable approach for cleaner leather manufacturing>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is salt chrome free pickling tanning clean leather manufacture.

Tannery effluents contain harmful pollutants, such as chromium, total dissolved solids, and neutral salts (chlorides), and hence researchers have focused on eco-benign pickling and tanning processes. Here, a sustainable approach employs a salt-free pickling and chrome-free tanning process for cleaner leather manufacturing Pretreatment with 8% epoxy-terminated hyperbranched poly(amine-ester) (abbreviated as EHBP) before pickling controlled the swelling of the skin in the pickling process, in the absence of conventional neutral salts. Subsequent tanning preferably with a 6% aluminum tanning agent (abbreviated as AL) improved the hydrothermal stability of the resultant crust. It also promoted the subsequent dyeing or fatliquoring in a wet finishing process, as well as ameliorated the yellowing resistance and chem. stability of the tanned leather. This study showed that without compromising on the quality of finished leather, EHBP could ensure a salt-free pickling and chrome-free tanning process and prevent the pollution of tannery effluents (Cl- and Cr3+) with a promising development for large-scale green production

Green Chemistry published new progress about Absorption (aluminum ions). 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

Jiang, Hong; Zhu, Yuxian; Chen, Zhangliang published the artcile< Insect resistance of transformed tobacco plants with gene of the spider insecticidal peptide>, Formula: C19H34O2, the main research area is tobacco transgenic insecticidal.

Tobacco leaves were transformed with Agrobacterium tumefaciens LBA4404 containing the insecticidal peptide gene. Thirty regenerated kanamycin resistant plants were obtained. Three plants showed stronger toxicity to Heliothis armigera by feeding experiments In comparison with feeding of the control plants, the mortality of the insects fed on transgenic plants were significantly higher and the growth of the survived insects were remarkably retarded. The results of PCR Southern blot and Northern blot showed that the insecticidal peptide gene was transferred into the genome of these three plants and expressed efficiently to confer the insect resistance of the transgenic plants.

Zhiwu Xuebao published new progress about Helicoverpa zea. 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

Akiyama, Ryo; Matsuki, Norio; Nomura, Hiroshi; Yoshida, Hisao; Yoshida, Tomoko; Kobayashi, Shu published the artcile< Nontoxic, nonvolatile, and highly efficient osmium catalysts for asymmetric dihydroxylation of alkenes and application to one mol-scale synthesis of an anticancer drug, camptothecin intermediate>, Electric Literature of 112-63-0, the main research area is Sharpless dihydroxylation osmium polymer catalyst prepare.

Novel polymer-incarcerated osmium (PI Os) catalysts have been developed. The osmium (Os) catalysts were shown to be nontoxic and nonvolatile, and stable for several months in air. Asym. dihydroxylation of alkenes using these Os catalysts proceeded smoothly to afford the corresponding diols in high yields with high enantioselectivities. The catalysts could be recovered and reused. A one mol-scale preparation of a key intermediate for camptothecin (anticancer drug, antitumor agent, quinoline alkaloid topoisomerase inhibitor) was successfully demonstrated by using the catalysts. The synthesis of the target compound was achieved using 4-ethyl-8-methoxy-1H-pyrano[3,4-c]pyridine (I) as a starting material and (DHQD)2PYR [(9S,9”S)-9,9”-[(2,5-diphenyl-4,6-pyrimidinediyl)bis(oxy)]bis[(0,11-dihydro-6′-methoxy)cinchonan]] as a ligand. The target compounds thus formed [i.e., (3R,4S)-4-ethyl-3,4-dihydro-8-methoxy-1H-pyrano[3,4-c]pyridine-3,4-diol (II)] was transformed into a camptothecin precursor, (4S)-4-ethyl-1,4-dihydro-4-hydroxy-8-methoxy-3H-pyrano[3,4-c]pyridin-3-one.

RSC Advances published new progress about Aryl alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Gunawan, Steven; Nichol, Gary; Hulme, Christopher published the artcile< Concise route to a series of novel 3-(tetrazol-5-yl)quinoxalin-2(1H)-ones>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is multicomponent reaction Ugi Azide quinoxalinone tetrazole preparation; benzodiazepine tetrazole preparation Ugi azide multicomponent reaction.

This Letter presents a novel three step solution phase protocol to synthesize 3-(tetrazol-5-yl)quinoxalin-2(1H)-ones. The strategy utilizes Et glyoxalate and mono-N-Boc-protected-o-phenylenediamine derivatives in the Ugi-Azide multi-component reaction (MCR) to generate a unique 1,5-disubstituted tetrazole. Subsequent acid treatment stimulates a simultaneous Boc deprotection and intramol. cyclization leading to bis-3,4-dihydroquinoxalinone tetrazoles. Direct oxidation using a stable solid-phase radical catalyst (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) with ceric ammonium nitrate (CAN) in catalytic fashion, initiating aerobic oxidation, completes the entire procedure to generate a series of original unique quinoxalinone tetrazoles, e.g., I. The method was also expanded to produce a benzodiazepine tetrazole, II.

Tetrahedron Letters published new progress about Cyclization. 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

Johannesson, Jenny; Hansson, Paula; Bergstroem, Christel A. S.; Paulsson, Mattias published the artcile< Manipulations and age-appropriateness of oral medications in pediatric oncology patients in Sweden: Need for personalized dosage forms>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is pediatric oncol oral medications age Sweden; Age-appropriate; Drug manipulation; Oncology; Oral medication; Pediatric; Personalized dosage form.

Due to the lack of age-appropriate formulations for children, healthcare professionals and caregivers frequently manipulate dosage forms to facilitate oral administration and obtain the required dose. In this study, we investigated drug manipulation and age-appropriateness of oral medications for pediatric oncol. patients with the aim of identifying the therapeutic needs for personalized dosage forms. An observational study at a pediatric oncol. ward, combined with anal. of the age-appropriateness of the oral medications, was performed. Nurses frequently manipulated solid dosage forms to administer them via enteral feeding tubes. Of the active pharmaceutical ingredients (APIs) assessed for age-appropriateness, 74% (29 of 39) were identified to need personalization, either because of lack of child-friendly dosage form, suitable dosage strength, or both. Most APIs, due to limited solubility, were sensitive to formulation changes, such as drug manipulation. This study demonstrates problems and therapeutic needs regarding oral dosage forms in treatment of children with cancer. Expertise in formulation design, new manufacturing technologies, and patient-centered information are needed to address age-appropriate formulations for children.

Biomedicine & Pharmacotherapy published new progress about Aging, animal. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Wang, Dan; Zhao, Li; Hao, Zhiyan; Huang, Ying; Liao, Yang; Wang, Lingli; Zhang, Jinfeng; Cao, Shan; Liu, Lixiao published the artcile< High-throughput and untargeted metabolic profiling revealed the potential effect and mechanisms of paeoniflorin in young asthmatic rats>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is asthma metabolic profiling paeoniflorin; action mechanism 3; biomarker; metabolites; metabolomics; pathways.

Paeoniflorin (PF) is a multi-target monoterpenoid glycoside and possesses broad pharmacol. functions, e.g., anti-inflammation, anti-depression, antitumor, abirritation, neuroprotection, antioxidant, and enhancing cognitive and learning ability. PF has gained a large amount of attention for its effect on asthma disease as the growth rate of asthma has increased in recent years. However, its mechanism of action on asthma is still unclear. In this study, we have explored the action mechanism of PF on asthma disease. Furthermore, high-throughput untargeted metabolic profiling was performed through ultraperformance liquid chromatog./electrospray ionization quadruple time-of-flight high-definition mass spectrometry (QA) UPLC-Q/TOF-MS combined with pattern recognition approaches and pathway anal. A total of 20 potential biomarkers were discovered by UPLC/MS and urine metabolic profiling. The key pathways including the citrate cycle (the TCA cycle), pyrimidine metabolism, pentose phosphate pathway, tyrosine metabolism, and tryptophan metabolism were affected by PF. In conclusion, we have discovered metabolite biomarkers and revealed the therapeutic mechanism of PF based on liquid chromatog. coupled with mass spectrometry untargeted metabolomics. The untargeted metabolomics combined with UPLC-MS is a useful tool for exploring the therapeutic mechanism and targets of PF in the treatment of asthma. Metabolomics combined with UPLC-MS is an integrated method to explore the metabolic mechanism of PF in the treatment of asthma rats and to reveal the potential targets, providing theor. support for the study of the treatment of PF.

Frontiers in Pharmacology published new progress about Asthma. 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

Legault, Claude Y.; Prevost, Julie published the artcile< 1-Fluoro-3,3-dimethyl-1,3-dihydro-1æµ?-benzo[d][1,2]iodoxole>, Computed Properties of 112-63-0, the main research area is mol structure fluoro methyl benzoiodoxole; crystal structure fluoro methyl benzoiodoxole.

The asym. unit of the title compound, C9H10FIO, contains two independent mols. which are weakly bound by intermol. O璺矾璺ç–?interactions [3.046(4) and 2.947(4) 鑴淽. The two covalent I-F bonds are slightly longer than the two I-O bonds. Crystallog. data and at. coordinates are given.

Acta Crystallographica, Section E: Structure Reports Online published new progress about Crystal structure. 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

Palo-Nieto, Carlos; Sau, Abhijit; Galan, M. Carmen published the artcile< Gold(I)-Catalyzed Direct Stereoselective Synthesis of Deoxyglycosides from Glycals>, Safety of (2R,3R,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate, the main research area is deoxyglycoside stereoselective synthesis gold catalyzed hydrofunctionalization glycal enol ether; oligosaccharide stereoselective synthesis gold catalyzed hydrofunctionalization glycal enol ether; glycosyl amino acid stereoselective synthesis gold catalyzed hydrofunctionalization glycal; glycoconjugate stereoselective synthesis gold catalyzed hydrofunctionalization glycal enol ether.

Au(I) in combination with AgOTf enables the unprecedented direct and æµ?stereoselective catalytic synthesis of deoxyglycosides from glycals. Mechanistic investigations suggest that the reaction proceeds via Au(I)-catalyzed hydrofunctionalization of the enol ether glycoside. The room temperature reaction is high yielding and amenable to a wide range of glycal donors and OH nucleophiles.

Journal of the American Chemical Society published new progress about Amino acids Role: SPN (Synthetic Preparation), PREP (Preparation) (glycosyl). 4098-06-0 belongs to class esters-buliding-blocks, and the molecular formula is C12H16O7, Safety of (2R,3R,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate.

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

Yilmaz, Yasar; Uysal, Nihan; Gelir, Ali; Guney, Orhan; Aktas, Demet K.; Gogebakan, Savas; Oner, Aylin published the artcile< Elucidation of multiple-point interactions of pyranine fluoroprobe during the gelation>, Product Details of C19H34O2, the main research area is hydrogel acrylamide methylenbisacrylamide copolymer preparation fluorescence.

We have studied the multiple-point interactions of the pyranine (8-hydroxypyrene-1,3,6-trisulfonic acid, trisodium salt; 3sPyOH) fluoroprobe with polymer chains during the free-radical polymerization of acrylamide (AAm) by using the steady state fluorescence measurements. We observed a considerable blue shift from 515 nm to 406 nm in the emission spectra due to a C-O ether bond formation between the hydroxylic oxygen of 3sPyOH and a terminal C-atom of the growing AAm chain. Furthermore ionic (electrostatic) interactions occur between the three ionized sulfonic acid groups (SO 3é‘?) of 3sPyOH and protonated amide groups on the AAm chains. These electrostatic interactions also cause a gradual red shift in the maximum of the short-wavelength-peak, from 406 nm to 430 nm. The pyranine can be used as a probe for real time monitoring of the polymerization process of AAm system since it monitors both the progression of the polymerization via chem. binding over OH group and the change in the local d. of the polymerizing sample by means of the gradual red shift in the short-wavelength-peak via ionic interactions over SO 3é‘? groups.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Diffusion (of fluoroprob). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Baro, Valentina; Cerretti, Giulia; Todoverto, Michela; Della Puppa, Alessandro; Chioffi, Franco; Volpin, Francesco; Causin, Francesco; Busato, Fabio; Fiduccia, Pasquale; Landi, Andrea; d’Avella, Domenico; Zagonel, Vittorina; Denaro, Luca; Lombardi, Giuseppe published the artcile< Newly Diagnosed Multifocal GBM: A Monocentric Experience and Literature Review.>, Related Products of 112-63-0, the main research area is glioblastoma; multicentric; multifocal; oncology; surgery; survival.

Glioblastomas with multiple foci at presentation (mGBMs) account for 2-35% of all GBMs. mGBMs have limited existing data and no standardized treatment. This study aims to determine their incidence, demographic and clinical features, outcome, and prognostic factors in terms of overall survival. We performed a monocentric retrospective study, reviewing patients treated at the Istituto Oncologico Veneto. Inclusion criteria were: new diagnosis of GBM and presence of multiple lesions on pre-treatment MRI. ECOG PS was used to evaluate clinical condition, RANO criteria for radiological assessment, and CTCAE v5.0 for treatment-related adverse events. The incidence of newly diagnosed mGBM was 7.2% and the study population consisted of 98 patients. Median age was 63 years, M:F ratio of 1.8:1, and a surgical approach was undertaken in 73 patients (mostly partial resection). MGMT was methylated in 47.5%, and 82 patients received active oncological treatment (65.9% radiotherapy plus temozolomide (RT + TMZ)). The disease control rate with RT + TMZ was 63%. Median OS of the entire study population was 10.2 months (95% CI 6.6-13.8), and median PFS was 4.2 months (95% CI 3.2-5.2). The ECOG PS, the extent of resection, and the RT + TMZ were significant prognostic factors in the univariate analysis for OS, but only the RT + TMZ was a significant independent OS predictor in the multivariate analysis (HR = 3.1, 95% IC 1.3-7.7, p = 0.014). The incidence of mGBM is not rare. RT + TMZ is confirmed to be an independent prognostic factor for survival and a safe and effective treatment. When feasible, RT + TMZ should be considered as a possible first-line treatment. The role of the extent of resection is still unclear.

Current oncology (Toronto, Ont.) published new progress about 112-63-0. 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