Category: ethers-buliding-blocks

Spadaro, Angelo; Rao, Marco; Lorenti, Miriam; Romano, Mario Rosario; Augello, Antonio; Eandi, Chiara Maria; Platania, Chiara Bianca Maria; Drago, Filippo; Bucolo, Claudio published the artcile< New brilliant blue G derivative as pharmacological tool in retinal surgery>, Formula: C3H7BrO, the main research area is alkyl brilliant blue inner limiting membrane retina vitreoretinal surgery; Brilliant Blue G; drug design; inner limiting membrane; pucker; retina; vitreoretinal surgery.

Our study was aimed at assessing the retinal binding of a new synthetic Brilliant Blue G (BBG) derivative (pure benzyl-Brilliant Blue G; PBB) ophthalmic formulation, to improve vitreoretinal surgery procedure. Protein affinity of the new mol. was evaluated in vitro (cell-free assay) and in silico. Furthermore, an ex vivo model of vitreoretinal surgery was developed by using porcine eyes to assess the pharmacol. profile of PBB, compared to com. formulations based on BBG and methyl-BBG (Me-BBG). PBB showed a higher affinity for proteins (p < 0.05), compared to BBG and Me-BBG. In vitro and in silico studies demonstrated that the high selectivity of PBB could be related to high lipophilicity and binding affinity to fibronectin, the main component of the retinal internal limiting membrane (ILM). The PBB staining capabilities were evaluated in porcine eyes in comparison with BBG and Me-BBG. Forty microliters of each formulation were slowly placed over the retinal surface and removed after 30 s. After that, ILM peeling was carried out, and the retina collected. BBG, Me-BBG, and PBB quantification in ILM and retina tissues was carried out by HPLC anal. PBB levels in the ILM were significantly (p < 0.05) higher compared to BBG and Me-BBG formulations. On the contrary, PBB showed a much lower (p < 0.05) distribution in retina (52 ng/mg tissue) compared to BBG and Me-BBG, in particular PBB levels were significantly (p < 0.05) lower. Therefore, the new synthetic Brilliant Blue derivative (PBB) showed a great ILM selectivity in comparison to underneath retinal layers. In conclusion, these findings had high translational impact with a tangible improving in ex vivo model of retinal surgery, suggesting a future use during surgical practice. Frontiers in Pharmacology published new progress about Bovine serum albumin Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Formula: C3H7BrO.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Lin, Xiao-Long; Yu, Yan; Zhang, Liang; Leng, Li-Jing; Xiao, Dong-Rong; Cai, Tian; Luo, Qun-Li published the artcile< Switchable synthesis of 1,4-bridged dihydroisoquinoline-3-ones and isoquinoline-1,3,4-triones through radical oxidation of isoquinolinium salts with phenyliodine(III) diacetate>, Category: ethers-buliding-blocks, the main research area is bridged dihydroisoquinolinone isoquinoline trione preparation stereoselective; isoquinolinium salt hydroxycoumarin radical oxidation annulation.

A metal-free switchable synthesis of 1,4-bridged dihydroisoquinoline-3-ones and isoquinoline-1,3,4-triones through the oxidation of isoquinolinium salts is described. 1,4-Bridged dihydroisoquinolin-3-ones were constructed for the first time via the sequential oxidation/annulation of isoquinolinium salts with 4-hydroxycoumarins. Meanwhile, the iodine(III)-oxidized intermediates of isoquinolinium salt could be converted to isoquinoline-1,3,4-triones in high yields by treatment with tert-Bu hydroperoxide. These site-selective transformations rely on an iodine(III)-mediated dual radical addition/radical coupling strategy and prove that the combination of the bromide anion and phenyliodine(III) diacetate is a useful carrier of relatively stable bromine radicals and highly labile carboxyl radicals.

Organic Chemistry Frontiers published new progress about Acetophenones Role: RCT (Reactant), RACT (Reactant or Reagent). 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Wei, Jie; Lu, Donghui; Jiang, Cailian; Fang, Dawei; Hu, Xiaohong published the artcile< Experimental determination of viscosity for the binary mixtures of the ether-functionalized ionic liquids [C22O1IM][TfO] with monohydric alcohols>, Computed Properties of 6482-24-2, the main research area is ionic liquid monohydric alc viscosity binary mixture.

In order to apply ionic liquids in various fields, it is necessary to understand their phys. and chem. properties. Viscosity, in particular, is an important parameter of multicomponent solutions and plays a decisive role in mass transfer, heat transfer and fluid flow in industrial process. In this work, the ether-functionalized ionic liquid [C22O1IM][TfO] was synthesized and characterized by 1H NMR, 13C NMR, ESI mass spectrometry and elemental anal. The viscosity of the binary mixture of ionic liquid [C22O1IM][TfO] with ethanol, 1-propanol and 2-propanol in the full concentration range of T = (288.15-318.15) K were measured. The relationships between the viscosity of the binary system and concentration and temperature were investigated. By Vogel-Tamman-Fulcher (VTF) equation and Arrhenius equation, the temperature dependences of the viscosities for the binary system were described and the VTF equation showed better correlation for the binary system. The viscosity deviation that expresses the difference between the actual value and the ideal value of the mixture viscosity, Δη, was calculated At the same time, the Gibbs energy of activation for viscous flow of the relative viscosity for the mixture, ΔG≠r, was also calculated based on the relative viscosity, ηr, and ΔG≠r is neg. that is consistent with the results of, Δη, it means that the interaction between ions becomes weak due to the solvation.

Journal of Molecular Liquids published new progress about Activation energy. 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Computed Properties of 6482-24-2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhao, Xin; Yang, Fang; Zou, Shao-Yu; Zhou, Qian-Qian; Chen, Zi-Sheng; Ji, Kegong published the artcile< Cu-Catalyzed Intermolecular γ-Site C-H Amination of Cyclohexenone Derivatives: The Benefit of Bifunctional Ligands>, Formula: C8H11NO, the main research area is aniline cyclohexenone copper catalyst regioselective amination green chem; amino alc preparation antibacterial antioxidant; cyclohexadienyl oxy silyl ether aniline copper regioselective diastereoselective amination; aminocyclohexenone preparation green chem.

Utilizing 1,10-phenanthroline-type bifunctional ligands, an efficient Cu-catalyzed intermol. site-selective remote C-H amination using cyclohexenone derivatives and anilines was realized. The amide group installed on the bifunctional ligand played a key role in stabilizing the N-centered radical generated in-situ to realize C-N-directed formation. Meanwhile, a useful catalytic system for site-selective intermol. remote γ-C-H amination to p-aminophenols and γ-aminated enones was established. This economical and practical approach using oxygen as the terminal oxidant was mild and environmentally friendly.

ACS Catalysis published new progress about Amination catalysts (stereoselective, regioselective). 10541-78-3 belongs to class ethers-buliding-blocks, and the molecular formula is C8H11NO, Formula: C8H11NO.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Xu, Hai-Feng; Pan, You-Lu; Li, Gang-Jian; Hu, Xu-Yang; Chen, Jian-Zhong published the artcile< Copper(II)-Catalyzed Direct C-H (Hetero)arylation at the C3 Position of Indoles Assisted by a Removable N,N-Bidentate Auxiliary Moiety>, Category: ethers-buliding-blocks, the main research area is arylated indole regioselective preparation; indole arylboronic ester arylation copper catalyst.

The regioselective arylation of inert C3-H bonds in indoles reacting with arylboronates via effective copper-mediated catalysis with the aid of a facile and removable 2-pyridinylisopropyl (PIP) group without ligand participation was reported. This newly established method features high compatibility with diverse functional groups between coupling partners, including both indole substrates and arylboron reagents, consequentially leading to operational simplicity and providing access to generate the desired arylated products I [R = H, 4-Me, 5-MeO, 6-Br, etc.; R1 = Me, Bn; Ar = Ph, 2-thienyl, 3-pyridyl, etc.] in good to excellent yields of up to 97%. Synthetically, the PIP-derived amide moiety could subsequently be readily removed under mild reaction conditions to produce useful indolecarboxylic acids for further transformation.

Journal of Organic Chemistry published new progress about Amides, secondary Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhang, Qin; Zhong, Ying; Yan, Lin-Na; Sun, Xun; Gong, Tao; Zhang, Zhi-Rong published the artcile< Synthesis and preliminary evaluation of curcumin analogues as cytotoxic agents>, Synthetic Route of 17100-64-0, the main research area is curcumin derivative preparation SAR anticancer cytotoxicity.

A series of curcumin analogs with different substituents at the 4-position of the Ph group were synthesized and screened for in vitro cytotoxicity against a panel of human cancer cell lines. Several novel curcumin analogs, especially I and II, exhibited selective and potent cytotoxic activity against human epidermoid carcinoma cell line A-431 and human glioblastoma cell line U-251, implying their specific potential in the chemoprevention and chemotherapy of skin cancer and glioma. The preliminary SAR information extracted from the results suggested that introduction of appropriate substituents to the 4′-positions could be a promising approach for the development of new cytotoxic curcumin analogs with special selectivity for A-431 and U-251 cell lines.

Bioorganic & Medicinal Chemistry Letters published new progress about Antitumor agents. 17100-64-0 belongs to class ethers-buliding-blocks, and the molecular formula is C8H9BrO2, Synthetic Route of 17100-64-0.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zimmermann, Birte M.; Ngoc, Trung Tran; Tzaras, Dimitrios-Ioannis; Kaicharla, Trinadh; Teichert, Johannes F. published the artcile< A Bifunctional Copper Catalyst Enables Ester Reduction with H2: Expanding the Reactivity Space of Nucleophilic Copper Hydrides>, Synthetic Route of 52244-70-9, the main research area is bifunctional azaheterocyclic carbene copper catalyst guanidine ester reduction alc.

Employing a bifunctional catalyst based on a copper(I)/NHC complex and a guanidine organocatalyst, catalytic ester reductions to alcs. with H2 as terminal reducing agent are facilitated. The approach taken here enables the simultaneous activation of esters through hydrogen bonding and formation of nucleophilic copper(I) hydrides from H2, resulting in a catalytic hydride transfer to esters. The reduction step is further facilitated by a proton shuttle mediated by the guanidinium subunit. This bifunctional approach to ester reductions for the first time shifts the reactivity of generally considered “”soft”” copper(I) hydrides to previously unreactive “”hard”” ester electrophiles and paves the way for a replacement of stoichiometric reducing agents by a catalyst and H2.

Journal of the American Chemical Society published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Synthetic Route of 52244-70-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Goswami, Lalit N.; Everett, Thomas A.; Khan, Aslam A.; Hawthorne, M. Frederick published the artcile< Rational Design of a Stable Two One-Electron Redox-Active closo-Dodecaalkoxyborane Ion as Biothiol Sensor>, SDS of cas: 6482-24-2, the main research area is biothiol sensor closo alkoxy dodecaborane preparation.

The interest in the incorporation of polyhedral boranes into hybrid mols. has increased tremendously. Most of those efforts have focused on the use of carboranes, as opposed to their all-B counterparts, the polyhedral borane anions. The authors’ efforts have paved the way for the synthesis and application of several inorganic-organic hybrid nanomol. scaffolds derived from closo-dodecaborate ions [B12H12]2- as high payload carriers of drugs and imaging agents. Herein the authors report a significant expansion to the scope of application for these interesting class of mols. A rationally designed water-soluble ether derivative of [B12H12]2-, the [closo-B12(OR)12]2- was synthesized as a highly efficient thiol sensing probe. The thiol sensing mechanism of the probe relies upon the unique two 1-e- redox chem. of the [closo-B12(OR)12]2- ion which is evident by a dramatic color change. This probe is effective over a wide pH range and has the ability to discriminate bio-thiols from common amino acids.

European Journal of Inorganic Chemistry published new progress about Optical biosensors (colorimetric). 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, SDS of cas: 6482-24-2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Leubner, Sebastian; Zhao, Haishuang; Van Velthoven, Niels; Henrion, Mickael; Reinsch, Helge; De Vos, Dirk E.; Kolb, Ute; Stock, Norbert published the artcile< Expanding the Variety of Zirconium-based Inorganic Building Units for Metal-Organic Frameworks>, Electric Literature of 190788-60-4, the main research area is zirconium benzenedicarboxylate acetate MOF preparation stability arene borylation catalyst; crystal structure zirconium benzenedicarboxylate biphenyldicarboxylate acetate microporous MOF; Direct C−H borylation; Electron Diffraction; Green Chemistry; Metal-organic Frameworks; Zirconium.

Two new Zr-based metal-organic frameworks [Zr6O4(OH)4(OAc)6(BDC)3] (CAU-26) and [Zr5O4(OH)4(OAc)4(BDC)2] (CAU-27) are reported, which were synthesized from HOAc, a rarely used but green and sustainable solvent (BDC2-: 1,4-benzenedicarboxylate). Structure determination aided by automated electron diffraction tomog. revealed that CAU-26 [Zr6O4(OH)4(OAc)6(BDC)3] is composed of layers of known {Zr6O8} clusters interconnected by terephthalate ions. In contrast CAU-27 [Zr5O4(OH)4(OAc)4(BDC)2] exhibits a three-dimensional structure with a so far unknown type of 1-dimensional inorganic building unit (IBU), which can be rationalized as condensed polyhedron-sharing chains of {Zr6O8} clusters. CAU-26 occurs as an intermediate of the CAU-27 synthesis and can be isolated easily, when reaction temperature and time are decreased. The authors were also able to synthesize two isoreticular derivatives of CAU-27 with extended linker mols. by implementing 4,4′-biphenyldicarboxylic acid (H2BPDC) and 5,5′-dicarboxy-2,2′-bipyridine (H2BIPY). All materials show high thermal and chem. stability as well as permanent microporosity. The excellent stability of CAU-27-BIPY was exploited to synthesize an Ir-supported heterogeneous MOF-based catalyst for the direct C-H borylation of arenes.

Angewandte Chemie, International Edition published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, Electric Literature of 190788-60-4.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Baker, Robert W.; Liu, Song; Sargent, Melvyn V.; Skelton, Brian W.; White, Allan H. published the artcile< Regioselectivity in the lithiation of 1,3-disubstituted arenes>, Application In Synthesis of 17100-64-0, the main research area is regioselectivity lithiation arene; naphthalenecarboxaldehyde tetramethoxy lithiation regiochem; naphthalenemethanol tetramethoxy lithiation regiochem; methoxybenzyl alc lithiation regiochem.

The regioselectivity of the lithiation of 1,4,5,8-tetramethoxynaphthalene-2-carbaldehyde with BuLi or PhLi in the presence of N,N,N’-trimethylethylenediamine and the subsequent bromination of the lithiated species so generated with 1,2-dibromotetrafluoroethane were investigated. Similar investigations with BuLi as base in the presence of N,N,N’,N’-tetramethylethylenediamine or KOCMe3 were carried out on 1,4,5,8-tetramethoxynaphthalene-2-methanol. These studies were extended to 1,5,8-trimethoxynaphthalene-3-methanol, (3-methoxybenzene)methanol and (3,5-dimethoxybenzene)methanol. The X-ray crystal structure of 6-bromo-1,4,5,8-tetramethoxynaphthalene-2-methanol is described.

Australian Journal of Chemistry published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 17100-64-0 belongs to class ethers-buliding-blocks, and the molecular formula is C8H9BrO2, Application In Synthesis of 17100-64-0.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem