16245-79-7Relevant articles and documents
Temporal emergence of giant vesicles accompanied by hydrolysis of ammonium amphiphiles with a Schiff-base segment
Toyota, Taro,Takakura, Katsuto,Sugawara, Tadashi
, p. 1442 - 1443 (2004)
An aqueous dispersion of the ammonium amphiphile with a Schiff-base segment exhibited the formation and decomposition of giant vesicles with diameters of several micrometers 2-4 h after the preparation. The time course trace of the morphological changes of the self-aggregates by means of light microscopy, electron microscopy and 1HNMR revealed that the temporal emergence of the giant vesicles was dependent on the progress of hydrolysis of the Schiff-base segment.
Heterobicyclic sphingosine 1-phosphate analogs
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Page/Page column, (2014/04/18)
Compounds that have agonist activity at one or more of the S1P receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at S1P receptors.
Fulleropyrrolidine end-capped molecular wires for molecular electronics-synthesis, spectroscopic, electrochemical, and theoretical characterization
Sorensen, Jakob Kryger,Fock, Jeppe,Pedersen, Anders Holmen,Petersen, Asger B.,Jennum, Karsten,Bechgaard, Klaus,Kilsa, Kristine,Geskin, Victor,Cornil, Jerome,Bjornholm, Thomas,Nielsen, Mogens Brondsted
, p. 245 - 263 (2011/03/20)
In continuation of previous studies showing promising metal-molecule contact properties a variety of C60 end-capped "molecular wires" for molecular electronics were prepared by variants of the Prato 1,3-dipolar cycloaddition reaction. Either benzene or fluorene was chosen as the central wire, and synthetic protocols for derivatives terminated with one or two fullero[c]pyrrolidine "electrode anchoring" groups were developed. An aryl-substituted aziridine could in some cases be employed directly as the azomethine ylide precursor for the Prato reaction without the need of having an electron-withdrawing ester group present. The effect of extending the π-system of the central wire from 1,4-phenylenediamine to 2,7-fluorenediamine was investigated by absorption, fluorescence, and electrochemical methods. The central wire and the C60 end-groups were found not to electronically communicate in the ground state. However, the fluorescence of C60 was quenched by charge transfer from the wire to C60. Quantum chemical calculations predict and explain the collapse of coherent electronic transmission through one of the fulleropyrrolidine-terminated molecular wires.
HETEROBICYCLIC SPHINGOSINE 1-PHOSPHATE ANALOGS
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Page/Page column 61, (2010/05/14)
Compounds that have agonist activity at one or more of the SlP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at SlP receptors.
Liquid-crystalline polymorphism of symmetrical azobananas: Bis(4-(4-alkylphenyl)azophenyl) 2-nitroisophtalates
Zygadlo,Dardas,Nowicka,Hofmann,Galewski
, p. 283 - 291 (2011/08/02)
In this paper we present a series of novel compounds, bis(4-(4-alkylphenyl) azophenyl) 2-nitroisophtalates, which exhibit nematic and banana-type liquidcrystalline phases. The alkyl chain length varies from 1 to 18 carbons. The first ten members of this series exhibit nematic phase. The last eleven compounds exhibit banana-type liquid crystalline phases. The propyl and pentyl derivatives have extra second type of banana mesophase. Copyright Taylor & Francis Group, LLC.
Palladium- and nickel-catalyzed cross-couplings of unsaturated halides bearing relatively acidic protons with organozinc reagents
Manolikakes, Georg,Munoz Hernandez, Carmen,Schade, Matthias A.,Metzger, Albrecht,Knochel, Paul
supporting information; experimental part, p. 8422 - 8436 (2009/04/11)
(Chemical Equation Presented) A wide range of polyfunctional aryl, heteroaryl, alkyl, and benzylic zinc reagents were coupled with unsaturated aryl halides bearing an acidic NH or OH proton, using Pd(OAc)2 (1 mol %) and S-Phos (2 mol %) as catalyst without the need of protecting groups. A similar nickel-catalyzed reaction is described. The relative kinetic basicity of organozinc compounds as well as their stability toward acidic protons is also described.
Hydrophobic effects in duplexes with modified oligonucleotide backbones and RNA
Waldner, Adrian,De Mesmaeker, Alain,Wendeborn, Sebastian
, p. 2363 - 2366 (2007/10/03)
The incorporation of hydrophobic substituents on the amide functionality of modified oligonucleotides drastically influences the thermal stability of the corresponding duplexes with the RNA complement.
Palladium-Catalyzed Cross-Coupling Reaction of Organoboron Compounds with Organic Triflates
Oh-e, Takayuki,Miyaura, Norio,Suzuki, Akira
, p. 2201 - 2208 (2007/10/02)
The cross-coupling reaction of 9-alkyl-9-borabicyclononane (9-R-9-BBN), 1-alkenyl-1,3,2-benzodioxaborole, or aryl boronic acid with 1-alkenyl or aryl triflates in the presence of K3PO4 (1.5 equiv) and a catalytic amount of Pd(PPh3)4 or Cl2Pd(dppf) resulted in high yields.The reaction conditions are sufficiently mild so that a variety of functionalized alkenes, alkadienes, and arenes are readily obtained.The utility of the present reaction was demonstrated by the cyclization of ω-alkenyl triflates leading to a benzo-fused cycloalkene and bicyclic alkene via a hydroboration intramolecular coupling sequence.
LIQUID CRYSTALLINE PROPERTIES OF 4-CHLOROBENZYLIDENE-4-AKYLANILINES
Galewski, Zbigniew
, p. 233 - 242 (2007/10/02)
A new group of Schiff bases containing a polar terminal group was synthesized: .The alkyl was changed from n=1 to n=12.Based on calorimetric (DSC) studies and on observations of textures the phase situation was characterized.
