Category: ethers-buliding-blocks

Adamska, Anna published the artcileSynthesis of linear and cyclic opioid-based peptide analogs containing multiple N-methylated amino acid residues, Formula: C25H23NO4, the publication is Journal of Peptide Science (2015), 21(11), 807-810, database is CAplus and MEDLINE.

A series of six novel opioid peptide analogs containing one to three N-methylamino acid residues, and six cyclic counterparts of these peptides were prepared by the solid-phase method. Introduction of two consecutive N-methylated amino acids, as well as cyclization of such conformationally constrained sequences, turned out to be challenging. The use of a recently reported triazine-based coupling reagent, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium toluene-4-sulfonate, enabled the synthesis and cyclization of the designed analogs in acceptable yields and with a lesser amount of byproducts than observed with the standard coupling reagents such as TBTU or HATU. Copyright © 2015 European Peptide Society and John Wiley & Sons, Ltd.

Journal of Peptide Science 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, Formula: C25H23NO4.

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

Kalcic, Filip published the artcilePolysubstituted Pyrimidines as mPGES-1 Inhibitors: Discovery of Potent Inhibitors of PGE₂ Production with Strong Anti-inflammatory Effects in Carrageenan-Induced Rat Paw Edema, SDS of cas: 849062-21-1, the publication is ChemMedChem (2020), 15(15), 1398-1407, database is CAplus and MEDLINE.

We report an extensive structure-activity relationship optimization of polysubstituted pyrimidines that led to the discovery of 5-butyl-4-(4-benzyloxyphenyl)-6-phenylpyrimidin-2-amine, and its difluorinated analog. These compounds are sub-micromolar inhibitors of PGE₂ production (IC₅₀ as low as 12 nM). In order to identify the mol. target of anti-inflammatory pyrimidines, we performed extensive studies including enzymic assays, homol. modeling and docking. The difluorinated analog simultaneously inhibits two key enzymes of the arachidonic acid cascade, namely mPGES-1 and COX-2, with mPGES-1 inhibition being the principal mechanism of action. Other pyrimidines studied are potent mPGES-1 inhibitors with no observed inhibition of COX-1/2 enzymes. Moreover, the two most potent compounds proved to be significantly effective in vivo in a model of acute inflammation, suppressing carrageenan-induced rat paw edema by 36 and 46%. The promising results of this study warrant further preclin. evaluation of selected anti-inflammatory candidates.

ChemMedChem published new progress about 849062-21-1. 849062-21-1 belongs to ethers-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic Acids,Boronic acid and ester,, name is (4-((3-Chlorobenzyl)oxy)-3,5-dimethylphenyl)boronic acid, and the molecular formula is C15H16BClO3, SDS of cas: 849062-21-1.

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

Zhang, Su-Yang published the artcileSynthesis, characterization, and electro-optical properties of a soluble conjugated polymer containing an oxadiazole unit in the main chain, Name: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Journal of Applied Polymer Science (2003), 89(10), 2618-2623, database is CAplus.

A novel copolymer, poly{[2,5-di-phenylene-1,3,4-oxadiazole-vinylene]-[2-methoxy-5-(2-ethylhexyl-oxy)-1,4-phenylenevinylene]}(MEH-OPPV) containing a high-electron-affinity unit of aromatic oxadiazole in the main chain is synthesized through the Wittig condensation reaction. The obtained copolymer is easily soluble in conventional organic solvents. The structure of the copolymer was characterized by Fourier transform IR, ¹H NMR, thermogravimetric anal. (TGA), differential scanning calorimetry (DSC), and UV-visible and photoluminescence spectroscopy. The TGA result indicates that the copolymer has very high thermal stability (stable up to 310°C in nitrogen), while DSC investigation demonstrates that the glass transition temperature (T_s) is 143°C, which might be a merit for the long-life operation of light-emitting devices. The absorption spectrum of film sample of the copolymer reveals two peaks at 310 and 370 nm, resp., and the edge absorption corresponds to a band gap of 2.46 eV. A single-layer light-emitting diode device ITO/MEH-OPPV/Al is successfully fabricated. The device emits visible yellowish-green light above the bias voltage of 4.0 V under ambient condition.

Journal of Applied Polymer Science 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 C4H4N2O2, Name: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene.

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

Suzuki, Rio published the artcileStain Protocol for the Detection of N-Terminal Amino Groups during Solid-Phase Peptide Synthesis, Recommanded Product: (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, the publication is Organic Letters (2020), 22(9), 3309-3312, database is CAplus and MEDLINE.

A novel and reversible detection method for N-terminal amino groups and alternative to the Kaiser test during Fmoc-SPPS has been developed. The utility of the new method was exemplified in its monitoring of the construction of a peptide, the final yield of which was higher than that of an identical peptide constructed under identical conditions but using the Kaiser test, and its scope was established to include all 20 proteinogenic amino acids as well as nonproteinogenic ones.

Organic Letters 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 C9H21NO3, Recommanded Product: (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid.

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

Liu, Ming published the artcileThe role of Zn in the sustainable one-pot synthesis of dimethyl carbonate from carbon dioxide, methanol and propylene oxide, Formula: C4H10O2, the publication is Chemical Engineering Science (2021), 116267, database is CAplus.

Di-Me carbonate (DMC) can be applied as a greener alternative to more hazardous materials, e.g. phosgene or di-Me sulfate. Herein, one-pot synthesis of DMC from propylene oxide, methanol and CO₂ using alkali halide catalysts under mild conditions was studied. Addition of Zn powder to the K₂CO₃-NaBr- MgZnO catalyst system was seen to increase DMC selectivity from 19.8% (TOF = 39.0 h^-1) to 40.2% (TOF = 78.1 h^-1) at 20 bar and 160°C for 5 h. Catalyst characterization showed that Zn powder increases the stability of the catalyst, preventing the active ingredients on the catalyst surface from leaching. An increase in propylene oxide conversion to DMC is attributed to the increase of Zn²⁺ ions in the reaction solution Elevated pressure was not found to be a necessary reaction condition for transesterification. This study shows that increased selectivity to DMC can be achieved at mild conditions with the addition of Zn powder.

Chemical Engineering Science published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Formula: C4H10O2.

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

Kertalli, E. published the artcileDirect synthesis of propylene oxide in a packed bed membrane reactor, Recommanded Product: 2-Methoxypropan-1-ol, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2017), 9-14, database is CAplus.

In the present work, the direct synthesis of propylene oxide (PO) in the liquid phase is successfully performed in a packed bed membrane reactor. We show that this engineering device can be implemented under mild reaction conditions (low temperature and pressure) and outside the explosive regime (low hydrogen concentration), making it appealing for industrial applications. The ceramic membrane allows for a sep. feed of the reactants, therefore addressing the PO selectivity issue related to the propylene hydrogenation. The reaction is operated in a continuous methanol flow fed with propylene inside the tubular membrane; hydrogen and oxygen are fed through the porous material. We observe that the feeding strategy of the reactants has an important effect on key parameters such as PO selectivity and productivity. By separating propylene from hydrogen, the propane formation was reduced with respect to conventional packed bed reactors. Moreover, the addition of small amounts of NaBr to the reaction medium increases the catalytic activity to PO, but also to propane formation. Therefore, this study provides a good starting point in the design of a membrane reactor device for the direct synthesis of PO where the main limitations such as propylene hydrogenation and water formation can be addressed.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Recommanded Product: 2-Methoxypropan-1-ol.

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

Habrant, Damien published the artcileTowards the total synthesis of calyculin C: preparation of the C₉-C₂₅ spiroketal-dipropionate unit, Computed Properties of 99438-28-5, the publication is Organic & Biomolecular Chemistry (2010), 8(19), 4364-4373, database is CAplus and MEDLINE.

An asym. synthesis of the C₉-C₂₅ spiroketal fragment of calyculin C is described. Key steps include two crotylation reactions using successively Brown’s reagent and (Z)-crotyltrifluorosilane for the formation of the anti, anti, anti stereo-tetrad, ynone formation by a Pd-catalyzed coupling of a thiol ester with a terminal alkyne and a double intramol. hetero-Michael addition for the stereoselective construction of the spiroketal framework.

Organic & Biomolecular Chemistry 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 C21H37BO, Computed Properties of 99438-28-5.

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

Karisalmi, Kaisa published the artcileStereoselective synthesis of the C₉-C₁₉ lactone-dipropionate fragment of calyculin C, Computed Properties of 99438-28-5, the publication is Tetrahedron Letters (2004), 45(44), 8245-8248, database is CAplus.

A highly diastereoselective synthesis of the title fragment (I) of calyculin C has been developed based on an internal asym. induction between a chiral aldehyde and Z-crotyl trifluorosilane.

Tetrahedron 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 C21H37BO, Computed Properties of 99438-28-5.

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

Ikeda, Koichi published the artcileSynthesis of polyazomethine having naphthalene structure in the main chain, Recommanded Product: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Kobunshi Ronbunshu (2009), 66(6), 234-237, database is CAplus.

We have synthesized aldehyde compounds with branched methylene groups by a LiCl catalyst. The number-average mol. weight and the weight-average mol. weight of the polymer, determined by MS, were 6.5 × 10³ and 6.5 × 10³, resp. The synthesized polymer showed a photoluminescence peak at 447 nm. However, the fluorescent strength did not show enough fluorescence. The TGA measurements of the polymer, showed that the polymer had a high thermal stability with a 10% thermal weight loss initiation temperature of 390°.

Kobunshi Ronbunshu 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 C15H24O2, Recommanded Product: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene.

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

Gilmartin, Philip H. published the artcileVanadium-Catalyzed Oxidative Intramolecular Coupling of Tethered Phenols: Formation of Phenol-Dienone Products, HPLC of Formula: 2944-47-0, the publication is Organic Letters (2020), 22(8), 2914-2919, database is CAplus and MEDLINE.

A mild and efficient method for the vanadium-catalyzed intramol. coupling of tethered free phenols is described. The corresponding phenol-dienone products are prepared directly in good yields with low catalyst loadings. Electronically diverse tethered phenol precursors are well tolerated, and the catalytic method was effectively applied as the key step in syntheses of three natural products and a synthetically useful morphinan alkaloid precursor.

Organic Letters 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, HPLC of Formula: 2944-47-0.

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