5307-02-8Relevant academic research and scientific papers
Self-Assembled Magnetic Gold Catalysts from Dual-Functional Boron Clusters
Qi, Bin,Wu, Chenchen,Li, Xin,Wang, Dan,Sun, Liang,Chen, Bo,Liu, Wenjing,Zhang, Haibo,Zhou, Xiaohai
, p. 2285 - 2290 (2018/05/15)
A new class of core–shell magnetic gold nanocomposites is prepared in a raspberry-like fashion by the controlled supramolecular host–guest assembly of γ-cyclodextrins (γ-CDs) and boron clusters. In this work, Cs2[closo-B12H12], a fundamental boron cluster, can play a dual role in the preparation of highly monodispersed Au nanoparticles and in the immobilization of Au nanoparticles on the γ-CDs@Fe3O4 surface as an effective anchor. This facile and spontaneous supramolecular strategy allows for the control of the size and composition of the highly stable gold composites. Furthermore, the obtained AuNPs@Fe3O4 composites exhibit an excellent catalytic activity and recyclability for the selective reduction of nitroaromatics to their corresponding aniline compounds, and the fastest reaction can be achieved within 20 s with a high conversion and selectivity at room temperature, which is better than that obtained previously in studies on metal nanoparticle composites as catalysts.
ELECTRONIC DEVICE AND COMPOUND
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Page/Page column 19, (2016/01/25)
The invention relates to an electronic device comprising a compound having Formula (1): ABX (1), wherein A is a structural moiety that consists of at least two atoms and comprises a conjugated system of delocalized electrons, each B is independently selected from an imine functional group (la), wherein R1, R2, R3, R4 are independently selected from C1-C30 alkyl, C2-C30 alkenyl, C2-C3 alkinyl, C3-C30 cycloalkyl, C6-C30 aryl, C2-C30 heteroaryl, C7-C30 arylalkyl, C3-C30 heteroarylalkyl, the wave line represents a covalent bond to the imine nitrogen atom, G is in each group (la) independently selected from a quarternary carbon atom and from a cyclopropenylidene structural moiety, x is an integer equal one or higher, preferably equal two or higher, and the lone electron pair of the imine nitrogen atom and/or the pi-electrons of the imine double bond of at least one group B is conjugated with the conjugated system of delocalized electrons comprised in the structural moiety A, with the proviso that two or more of the substituents R1, R2, R3, R4 may be connected to form a ring that may contain also unsaturation and, if any of the substituents R1, R2, R3, R4 comprises two or more carbon atoms, up to one third of the overall count of the carbon atoms in the substituent or in any ring formed by two connected substituents can be replaced with heteroatoms independently selected from O, S, N and B as well as to an electrically semiconducting material and a compound for use in the electronic device.
Structure-Activity and Structure-Property Relationship and Exploratory in Vivo Evaluation of the Nanomolar Keap1-Nrf2 Protein-Protein Interaction Inhibitor
Jiang, Zheng-Yu,Xu, Li-Li,Lu, Meng-Chen,Chen, Zhi-Yun,Yuan, Zhen-Wei,Xu, Xiao-Li,Guo, Xiao-Ke,Zhang, Xiao-Jin,Sun, Hao-Peng,You, Qi-Dong
, p. 6410 - 6421 (2015/09/08)
Directly disrupting the Keap1-Nrf2 protein-protein interaction (PPI) is an effective way to activate Nrf2. Using the potent Keap1-Nrf2 PPI inhibitor that was reported by our group, we conducted a preliminary investigation of the structure-activity and structure-property relationships of the ring systems to improve the drug-like properties. Compound 18e, which bore p-acetamido substituents on the side chain phenyl rings, was the best choice for balancing PPI inhibition activity, physicochemical properties, and cellular Nrf2 activity. Cell-based experiments with 18e showed that the Keap1-Nrf2 PPI inhibitor can activate Nrf2 and induce the expression of Nrf2 downstream proteins in an Nrf2-dependent manner. An exploratory in vivo experiment was carried out to further evaluate the anti-inflammatory effects of 18e in a LPS-challenged mouse model. The primary results indicated that 18e could reduce the level of circulating pro-inflammatory cytokines induced by LPS and relieve the inflammatory response. (Chemical Equation Presented).
Highly selective optical monitoring of O2via multiple-channels
Kumar, Anup,Gupta, Rinkoo D.,Gupta, Tarkeshwar
, p. 390 - 393 (2013/03/29)
An optical probe for the detection of O2 is outlined. The multi-responsive, redox-based sensor system is highly selective and response can be monitored optically either with conventional spectroscopic techniques, such as UV-Vis, IR or fluorescence, or by eye as a result of contrast colour changes from light yellow to dark red.
One step hair coloring compositions using salts
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, (2008/06/13)
A hair coloring composition comprising the following two compositions which are mixed just prior to application to the hair: (a) a composition comprising a water-soluble peroxygen oxidizing agent; and (b) a composition comprising one or more oxidative hair coloring agents selected from the group consisting of an aromatic diamine, an amino phenol, a naphthol, a polyhydric phenol, a catechol and mixtures thereof; wherein the composition comprising one or more oxidative hair coloring agents further comprises al least one water soluble carbonate releasing salts; and optionally a water soluble ammonium salt, is described.
Transition metal complexes as dye forming catalysts in hair coloring compositions
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, (2008/06/13)
A hair coloring composition comprising a first composition which comprises: (a) a dye forming transition metal salt or complex; which is first applied to the hair; and a second composition which comprises the following two compositions which are mixed just prior to application to the hair: (a) a composition comprising a water-soluble peroxygen oxidizing agent; and (b) a composition comprising one or more oxidative hair coloring agents selected from the group consisting of an aromatic diamine, an aminophenol, a polyhydric phenol a catechol and mixtures thereof.
Enhanced color deposition for hair with sequestering agents
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, (2008/06/13)
Hair coloring compositions which comprise: (A) non-nitrogenous chelating agents from the group consisting of polyphosphate; phosphonates; hydroxycarboxylates; polyacrylates; zeolite; and mixtures thereof; (B) an oxidative dye primary intermediate; and (C) an oxidative dye coupler; (D) and water are described. The present invention also relates to a method for coloring hair which comprises contacting said hair with a hair coloring composition as described above.
Synthesis of ring size seco-analogs of the antitumor antibiotic CC-1065 by two consecutive transition metal-initiated transformations
Tietze, Lutz F.,Looft, Jan,Feuerstein, Tim
, p. 2749 - 2755 (2007/10/03)
Novel seco-analogs of CC-1065 1 were synthesized from comercially available nitroaniline by reduction, bromination, bisulfonation and bisallylation followed by reaction with tert-butyllithium, zirconocene and iodine. The obtained quinoline 6 was then transformed into 17 and 18, which, upon treatment with Pd0, led to 21 and 22, respectively. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Process for dyeing keratinous fibers with aminoindoles and oxidation dye precursors at basic Ph's and dyeing agents
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, (2008/06/13)
The invention relates to a process for dyeing keratinous fibres, which consists in applying to these fibres a composition containing, in a suitable medium for dyeing, at least one coupler of formula: STR1 where R1 denotes hydrogen or alkyl, R2 and R3 denote hydrogen, alkyl, COOR' where R' is alkyl or hydrogen, at least one of the groups R2 and R3 denoting hydrogen, R4 denotes hydrogen, alkyl, hydroxyalkyl, polyhydroxyalkyl or aminoalkyl, Z1 and Z2 denote hydrogen, alkyl, hydroxyl, halogen, alkoxy, at least one of the groups Z1 and Z2 is other than hydrogen at least one oxidation dye precursor, at least one oxidizing agent, the pH of the composition applied to the fibres being higher than 7.
Methods for dyeing keratinous fibers with compositions which contain aminoindole couplers, oxidation dye precursors, and oxidizing agents at acid pHs
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, (2008/06/13)
A method for dyeing keratin fibers, wherein a composition is applied to said fibers which contains, in a suitable dyeing medium, at least one coupler having formula (I) STR1 wherein R1 is hydrogen or alkyl; R2 and R3 are hydrogen, alkyl, COOR', where R' is alkyl or hydrogen; R4 is hydrogen, hydroxyalkyl, alkyl, polyhydroxyalkyl or acetyl or aminoalkyl wherein the amine may be mono- or disubstituted by alkyl; Z1 and Z2 are hydrogen, alkyl, hydroxy, halogen, alkoxy or a salt thereof; at least one precursor of an oxidation hair dye; and at least one oxidizing agent, the pH of the composition applied to the fibers being less than 7.
