Category: ethers-buliding-blocks

Li, Liantao published the artcileSynthesis and pharmacological activity of fluorescent histamine H₁ receptor antagonists related to mepyramine, Name: N-(4-Methoxybenzyl)pyridin-2-amine, the publication is Bioorganic & Medicinal Chemistry Letters (2003), 13(7), 1245-1248, database is CAplus and MEDLINE.

Fluorescently labeled histamine H₁ receptor antagonists were synthesized starting from N-demethylmepyramine by introduction of ω-aminoalkyl chains (2-8 methylene groups in length) followed by derivatization of the terminal NH₂ group with various fluorophores (fluorescein, naphthofluorescein, rhodamine, tetramethylrhodamine, BODIPY, dansyl, and nitrobenzoxadiazole (NBD)). On the isolated guinea pig ileum and in a Ca²⁺ assay on U373MG human glioblastoma cells the highest H₁ antagonistic activities were found in 5- and 6-carboxyfluorescein labeled compounds with hexa- and octamethylene spacers and in an analogous NBD-aminohexanoyl derivative (pA₂ or pK_B values in the range: 8.3-9.0; compared to 9.3-9.4 for mepyramine).

Bioorganic & Medicinal Chemistry Letters published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Name: N-(4-Methoxybenzyl)pyridin-2-amine.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Haerianardakani, Sepehr published the artcilePhenylalanine mutation to cyclohexylalanine facilitates triangular trimer formation by β-hairpins derived from Aβ, SDS of cas: 77128-73-5, the publication is Journal of the American Chemical Society (2020), 142(49), 20708-20716, database is CAplus and MEDLINE.

Oligomers of the β-amyloid peptide, Aβ, play a central role in the pathogenesis and progression of Alzheimer’s disease. Trimers and higher-order oligomers composed of trimers are thought to be the most neurotoxic Aβ oligomers. To gain insights into the structure and assembly of Aβ oligomers, our laboratory has previously designed and synthesized macrocyclic peptides derived from Aβ_17-23 and Aβ_30-36 that fold to form β-hairpins and assemble to form trimers. In this study, we found that mutating Phe₂₀ to cyclohexylalanine (Cha) in macrocyclic Aβ-derived peptides promotes crystallization of an Aβ-derived peptide containing the Aβ_24-29 loop (peptide 3_F20Cha) and permits elucidation of its structure and assembly by X-ray crystallog. X-ray crystallog. shows that peptide 3_F20Cha forms a hexamer. X-ray crystallog. and SDS-PAGE further show that trimer 4_F20Cha, a covalently stabilized trimer derived from peptide 3_F20Cha, forms a dodecamer. Size exclusion chromatog. shows that trimer 4_F20Cha forms higher-order assemblies in solution Trimer 4_F20Cha exhibits cytotoxicity against the neuroblastoma cell line SH-SY5Y. These studies demonstrate the use of the F20Cha mutation to further stabilize oligomers of Aβ-derived peptides that contain more of the native sequence and thus better mimic the oligomers formed by full-length Aβ.

Journal of the American Chemical Society published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C25H23NO4, SDS of cas: 77128-73-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Shankar, Jaya Seeli published the artcileMechanism of photoinduced charge transfer at MEH-PPV and titanium dioxide nanoparticle interface, Application of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (2020), 59A(9Spec.Iss.), 1278-1284, database is CAplus.

In this study, we investigated mechanisms of photoinduced electron transfer from a conjugated polymer poly(2-methoxy-5-(2-ethylhexyloxy)1,4-phenylenevinylene) (MEH-PPV) to titanium dioxide (TiO₂) nanoparticles (acceptor) through steady-state photoluminescence (PL) spectroscopy. Since mixed phase TiO₂ has better photocatalytic compared to single phase, it is an efficient charge separation process during photoexcitation of polymer nanocomposites by incorporating the mixed phase TiO₂ nanoparticles into the MEH-PPV polymer matrix through in situ polymerization Structural characterization revealed only phys. interaction between the polymer matrix and dispersed nanoparticles. The absorbance spectra of nanocomposites also indicated the absence of ground state complex formation. Luminescence quenching of polymer nanocomposites compared to pristine MEH-PVV signifies the charge transfer taking place at the MEH-PPV/TiO₂ interfaces. Thus, the MEH-PPV/ mixed phase TiO₂ nanocomposite serves as an active layer for photovoltaic application.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C6H12F3NO5S, Application of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Rahman, Shafikur Md. published the artcileDiscovery of First-in-Class Peptidomimetic Neurolysin Activators Possessing Enhanced Brain Penetration and Stability, Synthetic Route of 6850-57-3, the publication is Journal of Medicinal Chemistry (2021), 64(17), 12705-12722, database is CAplus and MEDLINE.

Peptidase neurolysin (Nln) is an enzyme that functions to cleave various neuropeptides. Upregulation of Nln after stroke has identified the enzyme as a critical endogenous cerebroprotective mechanism and validated target for the treatment of ischemic stroke. Overexpression of Nln in a mouse model of stroke results in dramatic improvement of stroke outcomes, while pharmacol. inhibition aggravates them. Activation of Nln has therefore emerged as an intriguing target for drug discovery efforts for ischemic stroke. Herein, we report the discovery and hit-to-lead optimization of first-in-class Nln activators based on histidine-containing dipeptide hits identified from a virtual screen. Adopting a peptidomimetic approach provided lead compounds that retain the pharmacophoric histidine moiety and possess single-digit micromolar potency over 40-fold greater than the hit scaffolds. These compounds exhibit 5-fold increased brain penetration, significant selectivity over highly homologous peptidases, greater than 65-fold increase in mouse brain stability, and ‘drug-like’ fraction unbound in the brain.

Journal of Medicinal Chemistry published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H11NO, Synthetic Route of 6850-57-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

White, James D. published the artcileTotal Synthesis of Phorboxazole A. 1. Preparation of Four Subunits, Category: ethers-buliding-blocks, the publication is Organic Letters (2006), 8(26), 6039-6042, database is CAplus and MEDLINE.

Four subunits (I–IV) of the potent antitumor agent phorboxazole A were constructed. Fragments C20-C32 (I) and C9-C19 (II) containing tetrahydropyrans A and B, resp., were assembled using palladium-catalyzed intramol. alkoxycarbonylation.

Organic Letters published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C14H18BClO4, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Yadav, Naveen published the artcileRapid Access to Arylated and Allylated Cyclopropanes via Bronsted Acid-Catalyzed Dehydrative Coupling of Cyclopropylcarbinols, HPLC of Formula: 91-16-7, the publication is Journal of Organic Chemistry (2022), 87(10), 6886-6901, database is CAplus and MEDLINE.

A regioselective protocol for the synthesis of cyclopropyl derivatives that relies on Brookhart acid-catalyzed dehydrative coupling over substituted cyclopropylcarbinols without rearrangement is reported herein. The reactions proceed promptly at 25° with only 2.0 mol % catalyst loading and produce the cyclopropyl derivatives in excellent yields. This method is well tolerated with a vast range of cyclopropylcarbinols including aliphatic cyclopropylcarbinols, where no elimination product was obtained, demonstrating the protocol’s utility. Further, the Hammett correlation suggested the formation of a cyclopropylcarbinyl cation followed by a coupling reaction. An extremely effective gram-scale reaction has also been demonstrated with a high turnover number

Journal of Organic Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C3H9ClOS, HPLC of Formula: 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Bridoux, Alexandre published the artcileDesign, synthesis, and biological evaluation of bifunctional thyrointegrin inhibitors: new anti-angiogenesis analogs, Computed Properties of 2944-47-0, the publication is Journal of Enzyme Inhibition and Medicinal Chemistry (2011), 26(6), 871-882, database is CAplus and MEDLINE.

Context: Inhibition of pathol. angiogenesis. Objective: Obtaining new transactivator, bifunctional, thyroid antagonist, non-toxic anti-angiogenic compounds Materials and methods: In silico drug design, synthesis in bulk and biol. evaluation in chick chorioallantoic membrane (CAM) model. Results: Significant inhibition (range 65-73%) at 0.25-2.0 μg/mL doses. Discussion and conclusion: The synthesis of compounds (9), (10), and (11) incorporating long-chain moieties guanidine, urea, Me amine and, Pr amine substitutions, resp., into the core mol. framework of tetrac (tetraiodothyroacetic acid) were undertaken. The evaluation of the anti-angiogenic bioactivity of these compounds in the CAM model revealed no loss of activity in comparison with tetrac and XT199, which showed nearly 86% inhibition at dose levels of 1 and 0.5 μg/mL, resp., and validated the concept.

Journal of Enzyme Inhibition and Medicinal Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Computed Properties of 2944-47-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kubczak, Malgorzata published the artcileHippophae rhamnoides L. leaf and twig extracts as rich sources of nutrients and bioactive compounds with antioxidant activity, Quality Control of 134-96-3, the publication is Scientific Reports (2022), 12(1), 1095, database is CAplus and MEDLINE.

Plants have served for centuries as sources of compounds useful for human health such as antioxidant, anti-diabetic and antitumor agents. They are also rich in nutrients that improve the human diet. Growing demands for these compounds make it important to seek new sources for them. Hippophae rhamnoides L. is known as a plant with health-promoting properties. In this study we investigated the chem. composition and biol. properties of bioactive components of ethanol extracts from leaves and twigs of H. rhamnoides L. Chem. components such as the total content of phenolic compounds, vitamins and amino acids and the antioxidant activities of these compounds in cellular and cell-free systems were assessed. The results suggest that the studied extracts are rich in bioactive compounds with potent antioxidant properties. Cytotoxicity and hemotoxicity assays showed that the extracts had low toxicity on human cells over the range of concentrations tested. Interaction with human serum albumin was investigated and conformational changes were observed Our results indicate that leaf and twig extracts of H. rhamnoides L. should be considered as a non-toxic source of bioactive compounds which may be of interest to the food, pharmaceutical and cosmetic industries.

Scientific Reports published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Quality Control of 134-96-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Tennie, Iris K. published the artcilePolymeric ¹⁹F MRI Contrast Agents Prepared by Ring-Opening Metathesis Polymerization/Dihydroxylation, Product Details of C4H7F3O2, the publication is Macromolecules (Washington, DC, United States) (2020), 53(23), 10386-10396, database is CAplus.

The capability of ring-opening metathesis polymerization (ROMP) to efficiently incorporate bulky monomers and conserve olefin bonds during polymerization was exploited to design water-soluble fluoropolymers, which were evaluated as potential quant. ¹⁹F magnetic resonance imaging (MRI) contrast agents. The fluoromonomeric units comprised 3, 6, 9, or 18 magnetically equivalent fluorine atoms. Aqueous solubility was achieved through dihydroxylation of the partially unsaturated polymeric backbone and by tetraethylene glycol (TEG)-based linker incorporation, ammonium quaternization, or copolymerization

Macromolecules (Washington, DC, United States) published new progress about 2358-54-5. 2358-54-5 belongs to ethers-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-(2,2,2-Trifluoroethoxy)ethanol, and the molecular formula is C20H12N2O2, Product Details of C4H7F3O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Meringdal, Jonas W. published the artcileModular Synthesis of Halogenated Xanthones by a Divergent Coupling Strategy, Application In Synthesis of 91-16-7, the publication is Journal of Organic Chemistry (2022), 87(14), 9375-9383, database is CAplus and MEDLINE.

A versatile strategy to halogenated xanthones I (R¹ = H, R² = Br; R¹ = Br, R² = H; R³ = H, Cl) that relied on a modular coupling of vanillin derivatives with a dibromoquinone has been developed. Depending on the reaction conditions, either the 6- or the 7-bromo heterocycles can be obtained in a divergent manner. These heterocycles were readily further elaborated by sequential Sonogashira couplings, and the sequence might be successfully applied to substructures of the antibiotic lysolipin.

Journal of Organic Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Application In Synthesis of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem