Chemistry – An Asian Journal

Cover image for Vol. 4 Issue 12

December 1, 2009

Volume 4, Issue 12

Pages 1757–1843

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
    1. Cover Picture: A Sub-50-nm Monosized Superparamagnetic Fe3O4@SiO2T2-Weighted MRI Contrast Agent: Highly Reproducible Synthesis of Uniform Single-Loaded Core–Shell Nanostructures (Chem. Asian J. 12/2009) (page 1757)

      Feng Chen, Wenbo Bu, Yu Chen, Yuchi Fan, Qianjun He, Min Zhu, Xiaohang Liu, Liangping Zhou, Shengjian Zhang, Weijun Peng and Jianlin Shi

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200990041

      Thumbnail image of graphical abstract

      Key factors that influence the synthesis of monodisperse and single-loaded SPION§SiO2 nanostructure in the water-in-oil reverse microemulsion system have been obtained and are further suggested to effectively minimize the homogeneous nucleation of silica while maintaining the high dispersivity of SPION§SiO2, and to control the single-loading of oleic acid capped SPION into silica matrix. W. Bu, J. Shi et al. present a more detailed mechanism for incorporating oleic acid capped inorganic functional nanoparticles into silica proposed on the basis of previous reports and the new experimental results. For further details, turn to their Full Paper on page 1809 ff.

  2. Editorial

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
    1. You have free access to this content
  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
    1. Graphical Abstract: Chem. Asian J. 12/2009 (pages 1763–1766)

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200990042

  4. News

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
  5. Focus Review

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
    1. Photochemical Reactions

      Solid-State Asymmetric Photochemical Studies Using the Ionic Chiral Auxiliary Approach (pages 1774–1784)

      Chao Yang and Wujiong Xia

      Article first published online: 14 OCT 2009 | DOI: 10.1002/asia.200900249

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      Progress to solids: The ionic chiral auxiliary approach to asymmetric photochemical synthesis discovered by the Scheffer group has been successfully applied to many reactions in the solid state. Enantiomeric excesses of up to 99 % were obtained using this method. This Review summarizes and discusses the application of the solid state ionic chiral auxiliary technique to the Norrish type II reaction, the di-π-methane photorearrangement, and to a novel retro-Claisen photorearrangement.

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
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    1. N-Heterocyclic Carbenes

      Switching the Electron-Donor Properties of N-Heterocyclic Carbenes by a Facile Deprotonation Strategy (pages 1786–1789)

      Akkattu T. Biju, Keiichi Hirano, Roland Fröhlich and Frank Glorius

      Article first published online: 29 SEP 2009 | DOI: 10.1002/asia.200900410

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      Flip the switch! The facile and distinct variation of the electronic properties of an N-heterocyclic carbene (NHC) ligand is reported. In this process, a simple deprotonation/protonation strategy can render the NHC to be an electron-poor or an electron-rich NHC ligand: one ligand, two electronic natures.

    2. Boration

      Catalytic β-Boration/Oxidation of 1-Azadienes (pages 1790–1793)

      Cristina Sole and Elena Fernández

      Article first published online: 15 OCT 2009 | DOI: 10.1002/asia.200900311

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      A highly efficient Cu-catalyzed C[BOND]B bond formation has been developed to transform 1-azadienes into β-imino boronate esters when reacted with bis(pinacolato)diboron and a base. A series of functionalized imines and oximes were found to react under very mild conditions. A further oxidation protocol enabled β-iminoalcohols to be selectively synthesized.

    3. Heterogeneous Catalysis

      New Approach for Highly Active Ni2P Catalyst through Hydrogen-Thermal Treatment of Nickel(II)-Triphenylphosphine Complex (pages 1794–1797)

      Zhiqiang Wang, Linxi Zhou, Minghui Zhang, Ming Su, Wei Li and Keyi Tao

      Article first published online: 28 OCT 2009 | DOI: 10.1002/asia.200900232

      Thumbnail image of graphical abstract

      Bulk and supported nickel phosphides were successfully synthesized from solid nickel(II)-triphenylphosphine complex by a simple thermal treatment in hydrogen flow at 618 K, and the resulting silica-supported nickel phosphide catalyst exhibited superior activity for sulfur removal from dibenzothiophene over the catalyst prepared from nickel phosphate by conventional temperature-programmed reduction.

    4. Mesoporous Materials

      Mesoporous Silica/Polymer Composites Utilizing Intelligent Caps onto Mesopore Walls toward Practical Low-Dielectric Materials (pages 1798–1801)

      Shosuke Kiba, Yoshinori Okawauchi, Takeshi Yanagihara, Miwa Murakami, Tadashi Shimizu and Yusuke Yamauchi

      Article first published online: 28 OCT 2009 | DOI: 10.1002/asia.200900267

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      To put a cap on it: Intelligent caps have been added onto mesoporous walls toward innovative low-dielectric materials. Appropriately sized caps at the mesopore entrance is quite effective, which can prevent the penetration of the polymer during the mechanical composite processing and can also provide enough space for smaller-size molecules with lower polarity to access the inner mesopore surface.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
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    1. Natural Products

      A Method for the Rapid Discovery of Naturally Occurring Products by Proteins Immobilized on Magnetic Beads and Reverse Affinity Chromatography (pages 1802–1808)

      Midori A. Arai, Eiji Kobatake, Takashi Koyano, Thaworn Kowithayakorn, Shigeaki Kato and Masami Ishibashi

      Article first published online: 18 NOV 2009 | DOI: 10.1002/asia.200900357

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      Attracting the right candidates: A highly efficient screening method for naturally occurring products that bind to a specific target protein is demonstrated by using hVDR (human vitamin D receptor) magnetic beads and reverse affinity chromatography. Two new natural compounds are isolated by this method.

    2. Nanomaterials

      A Sub-50-nm Monosized Superparamagnetic Fe3O4@SiO2T2-Weighted MRI Contrast Agent: Highly Reproducible Synthesis of Uniform Single-Loaded Core–Shell Nanostructures (pages 1809–1816)

      Feng Chen, Wenbo Bu, Yu Chen, Yuchi Fan, Qianjun He, Min Zhu, Xiaohang Liu, Liangping Zhou, Shengjian Zhang, Weijun Peng and Jianlin Shi

      Article first published online: 9 NOV 2009 | DOI: 10.1002/asia.200900276

      Thumbnail image of graphical abstract

      The right mix! Key factors that influence the synthesis of monodisperse and single-loaded SPION§SiO2 nanostructure in the water-in-oil reverse microemulsion system have been obtained and are further suggested to effectively minimize the homogeneous nucleation of silica while maintaining the high dispersivity of SPION§SiO2, and to control the single-loading of oleic acid capped SPION into silica matrix.

    3. Nanostructures

      Concentration Dependent Transformation of Oligopeptide based Nanovesicles to Nanotubes and an Application of Nanovesicles (pages 1817–1823)

      Jishu Naskar and Arindam Banerjee

      Article first published online: 17 NOV 2009 | DOI: 10.1002/asia.200900274

      Thumbnail image of graphical abstract

      Concentrate to change! The concentration dependent transformation of an oligopeptide nanostructure from nanovesicles to nanotubes is reported. The reported peptide at a concentration of 6.9 mg mL−1 forms nanovesicles which upon dilution to 2.3 mg mL−1 turn into nanotubes. These vesicular structures are capable of encapsulating a potent anticancer drug that can be released in the presence of calcium ions.

    4. Hydride Abstraction

      Kinetics of Hydride Abstractions from 2-Arylbenzimidazolines (pages 1824–1829)

      Dorothea Richter, Yue Tan, Anna Antipova, Xiao-Qing Zhu and Herbert Mayr

      Article first published online: 16 OCT 2009 | DOI: 10.1002/asia.200900322

      Thumbnail image of graphical abstract

      Strong neutral hydride donors: The kinetics of hydride abstractions from 2-arylbenzimidazolines by benzhydrylium ions were determined and analyzed according to the linear free energy relationship log k=s(N+E). The nucleophilicity parameters N show that 2-arylbenzimidazolines are among the most reactive neutral hydride donors which have so far been parameterized, comparable to dihydropyridines.

    5. Tungsten Complexes

      Evidence for a Rapid Degenerate Hetero-Cope-Type Rearrangement in [Cp*W(S)2S-CH2-CH[DOUBLE BOND]CH2] (pages 1830–1833)

      Florian Eweiner, Shunsuke Senda, Klaus Bergander, Christian Mück-Lichtenfeld, Stefan Grimme, Roland Fröhlich, Michiko Aoyama, Hiroyuki Kawaguchi, Yasuhiro Ohki, Tsuyoshi Matsumoto, Gerald Kehr, Kazuyuki Tatsumi and Gerhard Erker

      Article first published online: 2 NOV 2009 | DOI: 10.1002/asia.200900360

      Thumbnail image of graphical abstract

      Allyl automerization: The title complex undergoes rapid allyl automerization, proceeding via a six-membered transition state, as identified by DFT calculations. A detailed temperature-dependent NMR study provides a Gibbs activation energy of about 14 kcal mol−1.

    6. Asymmetric Synthesis

      One-Pot Organocatalytic Asymmetric Synthesis of 3-Nitro-1,2-dihydroquinolines by a Dual-Activation Protocol (pages 1834–1838)

      Yi-Feng Wang, Wei Zhang, Shu-Ping Luo, Bai-Lin Li, Ai-Bao Xia, Ai-Guo Zhong and Dan-Qian Xu

      Article first published online: 14 OCT 2009 | DOI: 10.1002/asia.200900298

      Thumbnail image of graphical abstract

      Active at both ends: An enantioselective domino aza-Michael–Henry reaction of 2-aminobenzaldehydes with nitroolefins by a novel dual-activation protocol using primary amine thiourea catalysts provides a variety of 3-nitro-1,2-dihydroquinolines in moderate yields and with up to 90 % ee.

  8. Preview

    1. Top of page
    2. Cover Picture
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
    9. Preview
    1. You have free access to this content
      Preview: Chem. Asian J. 1/2010 (page 1843)

      Article first published online: 24 NOV 2009 | DOI: 10.1002/asia.200990044

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