Month: October 2022

Wang, Chaoyu; Bei, Wenfeng; Li, Wanting; Wang, Dongwei; Liu, Yuqin; Gong, Zile; Zeng, Kailin; Feng, Ruokun; Huang, Xianqiang; Qi, Chenze published the artcile< Cobalt-catalyzed O-arylation of N-protected amino alcohols with arenes via cross-dehydrogenative C-O coupling strategy: Direct access to aryloxyamines>, Category: esters-buliding-blocks, the main research area is amino alc aromatic amide cobalt catalyst cross dehydrogenative coupling; aryloxyamine regioselective preparation.

An efficient Co(II)-catalyzed cross-dehydrogenative C-O coupling strategy for the arylation of N-protected amino alcs., including 1,2-, 1,3- and 1,4-amino alcs., branched amino alcs. and cyclic amino alcs. with different amides derivatives was developed, affording a wide range of corresponding aryloxyamines compounds with excellent convertibility in moderate to good yields, which are of great interest in medicinal and pharmaceutical chem. Furthermore, this reaction system could be further applied to the preparation of potential bioactive mols.

Tetrahedron Letters published new progress about Amino alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 34637-22-4 belongs to class esters-buliding-blocks, and the molecular formula is C11H15NO3, Category: esters-buliding-blocks.

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

Wettasinghe, Mahinda; Vasanthan, Thava; Temelli, Feral; Swallow, Kevin published the artcile< Volatiles from Roasted Byproducts of the Poultry-Processing Industry>, Category: esters-buliding-blocks, the main research area is chicken byproduct volatile composition.

Volatiles of roasted chicken breast muscle and byproducts, such as backbones, breastbones, spent bones, and skin, were investigated. Total volatile concentrations ranged from 2030 ppb in the roasted backbones to 4049 ppb in the roasted skin. The major classes of volatile compounds detected in roasted samples were aldehydes (648-1532 ppb) and alcs. (336-1006 ppb). Nitrogen- and/or sulfur-containing compounds were also detected in appreciable quantities (161-706 ppb) in all samples. For all samples, hexanal and 2-methyl-2-buten-1-ol were dominant among the aldehydes and alcs., resp. Among the nitrogen- and sulfur-containing compounds, Maillard reaction products, such as tetrahydropyridazines, piperidines, and thiazoles, were the major contributors to the total volatile content in all samples. The composition of volatiles observed in roasted byproducts was markedly different from that of the roasted breast muscle. Therefore, the blending of the byproducts in appropriate proportions or blending of volatile flavor extracts from different byproducts may be necessary to obtain an aroma that mimics roasted chicken aroma.

Journal of Agricultural and Food Chemistry published new progress about Alcohols Role: BAC (Biological Activity or Effector, Except Adverse), BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Alker, D.; Swanson, A. G. published the artcile< Formation, synthetic utility and structure elucidation of a 2-(bromomethyl)-1,4-dihydropyridine>, Application In Synthesis of 112-63-0, the main research area is bromomethyldihydropyridine derivative preparation nucleophile substitution; pyridine bromomethyldihydro preparation nucleophile substitution.

The structure of the product obtained by reacting the 1,4-dihydropyridine I (R = H) with pyridinium bromide perbromide has been confirmed by NMR spectroscopy as the 2-bromomethyl derivative I (R = Br) (II). The reaction of II with a range of nucleophiles is reported.

Tetrahedron Letters published new progress about Nucleophilic substitution reaction. 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

Zhang, Aiqin; Li, Jing; Fan, Haojun; Xiang, Jun; Wang, Li; Yan, Jun published the artcile< Effect of mechanical properties on the self-healing behavior of waterborne polyurethane coatings>, Quality Control of 112-63-0, the main research area is waterborne polyurethane coating mech property effect self healing behavior.

The effect of structural parameters such as hard segment content and crosslinking degree on the mech. properties of waterborne self-healing polyurethane and the effect of tensile strength, self-healing conditions (temperature, time) on the self-healing properties were investigated. These results demonstrated that as the increasing of the content of hard segments/the crosslinking agent, the tensile strength of the sample increased and the self-healing performance exhibited a downward trend. When the tensile strength reached 40 MPa, it could hardly healed, even if prolonging the self-healing time or increasing the self-healing temperature Mechanism study demonstrated that the self-healing ability was attributed to the dynamic exchange of disulfide bonds and the thermal reversibility of hydrogen bonds in the system. Hydrogen bonding could provide the initial self-healing force and promote the dynamic exchange reaction of disulfide bonds, while high hydrogen bonding is not conducive to the movement of macromol. segments, causing a decrease in the self-healing efficiency.

Journal of Applied Polymer Science published new progress about Crack (fracture). 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

Morino, Yusuke; Yatabe, Takafumi; Suzuki, Kosuke; Yamaguchi, Kazuya published the artcile< Cu/N-Oxyl-catalyzed aerobic oxidative esterification to oxalic acid diesters from ethylene glycol via highly selective intermolecular alcohol oxidation>, COA of Formula: C4H8O3, the main research area is oxalic acid diester preparation green chem; ethylene glycol primary sec alc aerobic oxidative esterification; copper tetramethylethylenediamine dimethyl azanoradamantane oxyl catalyst.

One of the ideal green esterification reactions is aerobic oxidative esterification using only a stoichiometric amount of different alcs. via intermol. selective alc. oxidation followed by hemiacetal formation by the addition of the other alc. and hemiacetal oxidation to esters. However, oxalic acid diester synthesis via oxidative esterification has not been reported to date, possibly owing to the difficulty of selectivity control of intermol. alc. oxidation and the chelating effects of ethylene glycol-derived alcs./hemiacetals on inhibiting oxidation catalysts. Herein, using a CuCl/tetramethylethylenediamine/1,5-dimethyl-9-azanoradamantane N-oxyl catalyst, authors describe a highly efficient aerobic oxidative esterification reaction of ethylene glycol to various oxalic acid diesters via selective oxidation of ethylene glycol-derived alcs./hemiacetals even in the presence of other aliphatic primary alcs. Notably, the green reaction works well using an ideal stoichiometric ratio of ethylene glycol and primary/secondary alcs. Thorough exptl. investigation and theor. calculations revealed that highly selective oxidative esterification is enabled by the preferential bidentate coordination of ethylene glycol-derived alcs./hemiacetals to the Cu(II) species, followed by efficient two-electron/one-proton transfer.

Green Chemistry published new progress about Dicarboxylic acids, diesters Role: SPN (Synthetic Preparation), PREP (Preparation). 623-50-7 belongs to class esters-buliding-blocks, and the molecular formula is C4H8O3, COA of Formula: C4H8O3.

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

Zhang, Wen-ji; Li, Dong; Xu, Yingjian; Jiang, Zhaolin; Chen, Yang; Wang, Peng published the artcile< Synthesis and Application of Novel Molecularly Imprinted Solid Phase Extraction Materials Based on Carbon Nanotubes for Determination of Carbofuran in Human Serum by High Performance Liquid Chromatography>, Safety of 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is molecularly imprinted polymer carbon nanotube carbofuran extraction; HPLC analysis; carbofuran; carbon nanotubes; molecularly imprinted; serum.

Novel molecularly imprinted polymers (MIPs) based on multiwalled carbon nanotubes (MWNTs) were synthesized using carbofuran as template, methacrylic acid as functional monomer, and trimethylolpropane trimethacrylate as cross-liking agent, resp. Characterization results showed that the carbofuran MIPs have been successfully grafted onto the surface of MWNTs as a thin layer with high stability. The results of adsorption dynamics indicated that the synthesized MWNT-MIPs displayed a biphase adsorption profile and good selective recognition to carbofuran with equilibrium adsorption of 106.2 mg/g. The MWNTs-MIPs synthesized were further applied as the adsorbent material of solid-phase extraction (SPE) for the pretreatment of carbofuran in human serum, analyzed using high performance liquid chromatograph (HPLC). The recoveries obtained ranged from 89.0±4.8 to 93.6±3.2, showing that the MWNTs-MIPs-SPE system developed have specific recognition toward carbofuran. Results above indicated that the proposed system filled with synthesized MWNTs-MIPs provided a fast and selective extraction of carbofuran in serum.

Journal of Agricultural and Food Chemistry published new progress about Adsorbents. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Safety of 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate).

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

Garzio, Kayla; McElroy, Kelly; Grossman, Stuart; Holdhoff, Matthias; Ozer, Byram; Yankulina, Olga published the artcile< Safety of temozolomide use in adult patients with renal dysfunction>, Electric Literature of 112-63-0, the main research area is Glioblastoma; High grade glioma; Primary central nervous system lymphoma; Renal impairment; Temozolomide.

Abstract: Purpose: Temozolomide (TMZ), a cytotoxic DNA alkylating agent, is the main chemotherapy used for the treatment of high grade astrocytomas. The active alkylator, methylhydrazine, is not recovered in urine and thus renal function is not expected to affect clearance. Prescribing information for TMZ states pharmacokinetics have not been studied in adults with poor renal function, eGFR < 36 mL/min/1.73 m2. We reviewed our clin. experience with TMZ in patients with impaired renal function to evaluate safety of administering full dose TMZ. Methods: The primary endpoint was to characterize the incidence and severity of thrombocytopenia in patients with eGFR < 60 mL/min/1.73 m2 who received TMZ for treatment of high grade gliomas (HGG) or primary CNS lymphoma (PCNSL). Secondary endpoints included incidence and severity of neutropenia, lymphopenia hepatotoxicity, and number of TMZ cycles administered. Medical records of patients with HGG or PCNSL treated with TMZ from Oct. 1, 2016-Sept. 30, 2019 were accessed to identify cases for this study. Results: Thirty-two patients were eligible for this study. Of the seven patients with eGFR < 36 mL/min/1.73m2, 38/39 cycles (97%) were completed without grade 3-4 thrombocytopenia. No patients experienced grade 3-4 neutropenia, and grade 3-4 lymphopenia occurred in 5 cycles (15%). One patient discontinued TMZ 7 days prior to completion of radiation due to thrombocytopenia. Conclusion: Hematol. toxicity in patients with severe renal dysfunction, eGFR < 36 mL/min/1.73m2, is similar to that of patients with normal renal function. Severe renal impairment does not preclude use of temozolomide, but cautious monitoring of blood counts is warranted. Journal of Neuro-Oncology published new progress about 112-63-0. 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

Hollenhorst, Marie A.; Bumpus, Stefanie B.; Matthews, Megan L.; Bollinger, J. Martin; Kelleher, Neil L.; Walsh, Christopher T. published the artcile< The Nonribosomal Peptide Synthetase Enzyme DdaD Tethers Nβ-Fumaramoyl-L-2,3-diaminopropionate for Fe(II)/α-Ketoglutarate-Dependent Epoxidation by DdaC during Dapdiamide Antibiotic Biosynthesis. [Erratum to document cited in CA153:612347]>, Quality Control of 77215-54-4, the main research area is erratum peptide synthetase DdaD epoxidation DdaC DdaF dapdiamide; Pantoea nonribosomal peptide synthetase DdaD epoxidation erratum.

On Supporting Information page S5, the addition of one equivalent of N-methlymorpholine was omitted from the methods for preparation of amides 2a and 2b. The reagent was added prior to cooling the solutions to -10 °C. On Supporting Information page S7, the wording of the method section ‘G. DdaC/D Enzymic Assays with Anaerobically Purified Ddac’ was altered to make it more clear. This material is available free of charge via the Internet at http://pubs.acs.organic

Journal of the American Chemical Society published new progress about Antibiotics (dapdiamide). 77215-54-4 belongs to class esters-buliding-blocks, and the molecular formula is C12H24N2O4, Quality Control of 77215-54-4.

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

Guan, Xin; Ngai, To published the artcile< pH-Sensitive W/O Pickering High Internal Phase Emulsions and W/O/W High Internal Water-Phase Double Emulsions with Tailored Microstructures Costabilized by Lecithin and Silica Inorganic Particles>, COA of Formula: C18H26O6, the main research area is emulsion Pickering silica nanoparticle lecithin.

Synergistic stabilization of Pickering emulsions by a mixture of surfactants and colloidal particles has received increasing interest in recent years but only a few of them can produce high internal phase double emulsions (HIPDEs) with good stability. In this study, we present a feasible and common method of preparing Pickering high internal phase emulsions (HIPEs) with tunable inner morphol. costabilized by a biosurfactant lecithin and silica nanoparticles. We investigate the influence of the pH value on the interfacial behavior of lecithin and elucidate the synergistic mechanism between lecithin and silica nanoparticles in different conditions in the stability of as-prepared emulsions. Specifically, water-in-oil (W/O) Pickering HIPEs can be successfully stabilized by lecithin and hydrophobic silica nanoparticles in a wide pH range (pH 1-10), while catastrophic phase inversion occurred at high pH values (pH ≥ 11). Interestingly, stable water-in-oil-in-water (W/O/W) high internal phase double emulsions (HIPDEs) can also be prepared via a two-step method by the cooperation of lecithin and silica nanoparticles. Moreover, functional interconnected porous monoliths and microspheres are facilely fabricated by emulsion templates and their potential applications are explored.

Langmuir published new progress about Contact angle. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, COA of Formula: C18H26O6.

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

Childers, Wayne E. Jr.; Havran, Lisa M.; Asselin, Magda; Bicksler, James J.; Chong, Dan C.; Grosu, George T.; Shen, Zhongqi; Abou-Gharbia, Magid A.; Bach, Alvin C. III; Harrison, Boyd L.; Kagan, Natasha; Kleintop, Teresa; Magolda, Ronald; Marathias, Vasilios; Robichaud, Albert J.; Sabb, Annmarie L.; Zhang, Mei-Yi; Andree, Terrance H.; Aschmies, Susan H.; Beyer, Chad; Comery, Thomas A.; Day, Mark; Grauer, Steven M.; Hughes, Zoe A.; Rosenzweig-Lipson, Sharon; Platt, Brian; Pulicicchio, Claudine; Smith, Deborah E.; Sukoff-Rizzo, Stacy J.; Sullivan, Kelly M.; Adedoyin, Adedayo; Huselton, Christine; Hirst, Warren D. published the artcile< The Synthesis and Biological Evaluation of Quinolyl-piperazinyl Piperidines as Potent Serotonin 5-HT1A Antagonists>, Application In Synthesis of 112-63-0, the main research area is quinolinyl piperazinyl piperidine derivative preparation serotonin 5HT1A antagonist.

As part of an effort to identify 5-HT1A antagonists that did not possess typical arylalkylamine or keto/amido-alkyl aryl piperazine scaffolds, prototype compound I was identified from earlier work in a combined 5-HT1A antagonist/SSRI program. This quinolyl-piperazinyl piperidine analog displayed potent, selective 5-HT1A antagonism but suffered from poor oxidative metabolic stability, resulting in low exposure following oral administration. SAR studies, driven primarily by in vitro liver microsomal stability assessment, identified compound II, which displayed improved oral bioavailability and lower intrinsic clearance. Further changes to the scaffold resulted in a loss in potency. Compound II displayed cognitive enhancing effects in a number of animal models of learning and memory, enhanced the antidepressant-like effects of the SSRI fluoxetine, and reversed the sexual dysfunction induced by chronic fluoxetine treatment.

Journal of Medicinal Chemistry published new progress about 5-HT1A receptors Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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