Chemistry – An Asian Journal

Cover image for Vol. 7 Issue 5

May 2012

Volume 7, Issue 5

Pages 841–1115

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
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    1. You have free access to this content
      Cover Picture: Iodine(III)-Promoted Intermolecular Diamination of Alkenes (Chem. Asian J. 5/2012) (page 841)

      Dr. José A. Souto, Yolanda González, Dr. Alvaro Iglesias, Debora Zian, Anton Lishchynskyi and Prof. Dr. Kilian Muñiz

      Article first published online: 26 APR 2012 | DOI: 10.1002/asia.201290016

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      A view from the top: The famous balcony at Tarragona provides an unsurpassed view over the Mediterranean Sea. Several diamines are enjoying this view as they were produced at the laboratories of the local chemistry institute, the Institute of Chemical Research of Catalonia (ICIQ). The key to the success of their synthesis, reported as a Full paper by Kilian Muñiz et al. on page 1103 ff., has been the application of hypervalent iodine(III) compounds. Their T-shaped structure nicely resembles the emblem of the town of Tarragona.

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
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    1. You have free access to this content
      Inside Cover: Charge Matching on Designing Neutral Cadmium–Lanthanide–Organic Open Frameworks for Luminescence Sensing (Chem. Asian J. 5/2012) (page 842)

      Hui Yang, Dr. Fei Wang, Yan-Xi Tan, Yao Kang, Prof. Dr. Tie-Hu Li and Prof. Dr. Jian Zhang

      Article first published online: 26 APR 2012 | DOI: 10.1002/asia.201290017

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      Tuning charge distribution for a building block and creating an isostructural neutral framework from an anionic framework are rarely known to date. As described in their Full paper on page 1069 ff., Jian Zhang et al. present a simple replacement of metal from Cd2+ to Ln3+ in a building unit, which not only transforms an anionic microporous framework into a neutral one but also greatly enhances its functionality with respect to luminescence sensing of organic solvents and metal ions. The results reveal new insights into the importance of charges for the structural design of functional metal–organic frameworks.

  3. Graphical Abstract

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
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    1. Graphical Abstract: Chem. Asian J. 5/2012 (pages 845–854)

      Article first published online: 26 APR 2012 | DOI: 10.1002/asia.201290018

  4. News

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    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. Inside Cover
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
    8. Full Papers
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    1. Electroless Deposition

      Surface-Grafted Polymer-Assisted Electroless Deposition of Metals for Flexible and Stretchable Electronics (pages 862–870)

      Xuqing Liu, Dr. Xuechang Zhou, Prof. Yi Li and Prof. Zijian Zheng

      Article first published online: 5 MAR 2012 | DOI: 10.1002/asia.201100946

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      Coat for success: Surface-grafted polymers, that is, ultrathin layers of polymer coating covalently tethered to a surface, can serve as a particularly promising nanoplatform for electroless deposition of metals for applications in flexible and stretchable electronics (see picture).

  6. Communications

    1. Top of page
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    3. Inside Cover
    4. Graphical Abstract
    5. News
    6. Focus Review
    7. Communications
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    1. Direct Esterification

      N-Heterocyclic Carbene-Catalyzed Aerobic Oxidative Direct Esterification of Aldehydes with Organoboronic Acids (pages 872–875)

      Dr. Jing-Jing Meng, Min Gao, Yu-Ping Wei and Prof. Wen-Qin Zhang

      Article first published online: 27 MAR 2012 | DOI: 10.1002/asia.201200076

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      A simple procedure affording benzoates through a NHC-catalyzed aerobic oxidative esterification of aldehydes with organoboronic acids has been disclosed. This process allows access to a wide variety of aromatic esters in good to excellent yields under simple, efficient, and sustainable reaction conditions (see scheme).

    2. Nanoporous Materials

      Facile Synthesis of Nanoporous Pt–Ru Alloy Spheres with Various Compositions toward Highly Active Electrocatalysts (pages 876–880)

      Hamed Ataee-Esfahani, Dr. Yoshihiro Nemoto, Dr. Masataka Imura and Prof. Dr. Yusuke Yamauchi

      Article first published online: 20 MAR 2012 | DOI: 10.1002/asia.201200053

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      Into new spheres: We report a facile, one-step, and low-cost method for the synthesis of nanoporous Pt–Ru spheres with a high surface area, in which a commercially available block copolymer is used. The obtained unique dendritic nanoarchitecture, with an open nanoporous structure, is favorable for providing an unblocked transportation of guest species such as methanol molecules.

    3. Asymmetric Synthesis

      Highly Efficient Asymmetric Michael Addition of Diaryl Phosphine Oxides to α,β-Unsaturated N-Acylated Oxazolidin-2-ones (pages 881–883)

      Dr. Depeng Zhao, Linqing Wang, Dongxu Yang, Yixin Zhang and Prof. Dr. Rui Wang

      Article first published online: 13 MAR 2012 | DOI: 10.1002/asia.201200025

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      A highly efficient asymmetric Michael reaction of diaryl phosphine oxides with α,β-unsaturated N-acylated oxazolidinones has been developed. Excellent enantioselectivities (up to >99 % ee) and chemical yields (up to 99 %) were achieved with a broad substrate scope of the oxazolidinones. The bidentate property of oxazolidinones was found to be critical for high enantioselectivities.

    4. C[BOND]H Activation

      Heck-Type Cross-Dehydrogenative Coupling Reactions of Indolizines at the 3-Position with Electron-Deficient Alkenes through Palladium-Catalyzed C[BOND]H Activation (pages 884–888)

      Dr. Huayou Hu, Dr. Yun Liu, Hao Zhong, Prof. Yulan Zhu, Dr. Chao Wang and Dr. Min Ji

      Article first published online: 2 MAR 2012 | DOI: 10.1002/asia.201101050

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      A cross-dehydrogenative coupling reaction of indolizines with electron-deficient alkenes for the synthesis of 3-alkenyl-substituted indolizines has been reported. The reaction takes place at the 3-position selectively through palladium-catalyzed C[BOND]H activation, following a Heck-type cross-coupling reaction under mild and ligand-free conditions. Furthermore, the reaction mechanism of the PdII/Pd0 catalytic pathway was also confirmed by 1H NMR spectroscopy.

    5. Porphyrinoids

      Aromatic-to-Antiaromatic Switching in Triply Linked Porphyrin Bis(rhodium(I)) Hexaphyrin Hybrids (pages 889–893)

      Takayuki Tanaka, Dr. Naoki Aratani and Prof. Dr. Atsuhiro Osuka

      Article first published online: 15 FEB 2012 | DOI: 10.1002/asia.201101039

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      Switch 'em up: Two-electron oxidation and reduction switches the title complexes between aromatic and antiaromatic character (see picture). The switching is confirmed by 1H NMR and UV/Vis/NIR absorption spectroscopy and by cyclic voltammetry. The structure of the porphyrin–[26]hexaphyrin hybrid tape was elucidated by X-ray diffraction analysis.

    6. Natural Products

      Formal Synthesis of (−)-Cephalotaxine Based on a Tandem Hydroamination/Semipinacol Rearrangement Reaction (pages 894–898)

      Qing-Wei Zhang, Kai Xiang, Prof. Dr. Yong-Qiang Tu, Dr. Shu-Yu Zhang, Xiao-Ming Zhang, Dr. Yu-Ming Zhao and Tian-Cai Zhang

      Article first published online: 1 MAR 2012 | DOI: 10.1002/asia.201101029

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      Catalytic asymmetric formal synthesis of (−)-cephalotaxine has been accomplished based on an efficient tandem intramolecular hydroamination/asymmetric semipinacol rearrangement reaction catalyzed by chiral silver phosphate. During the course of the study it was observed that an advanced intermediate could be obtained in enantiopure form by enantiomer separation on silica gel.

    7. PHOLEDs

      Pyridine-Modified Acridine-Based Bipolar Host Material for Green Phosphorescent Organic Light-Emitting Diodes (pages 899–902)

      Mounggon Kim and Prof. Jun Yeob Lee

      Article first published online: 12 MAR 2012 | DOI: 10.1002/asia.201101030

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      A bipolar host material with a phenyl-modified acridine core and a pyridine unit in the molecular structure was synthesized as the host material for green phosphorescent organic light-emitting diodes (PHOLEDs). A high triplet energy of 2.76 eV was obtained from the host and a high quantum efficiency of 13.5 % was achieved in green PHOLEDs using the acridine-based host material.

    8. Synthetic Methods

      Copper(I)-Catalyzed Hydroalkoxylation/Hydrogen-Bonding-Induced Asymmetric Hetero-Diels–Alder Cycloaddition Cascade: An Approach to Aromatic Spiroketals (pages 903–906)

      Xin Li, Dr. Jijun Xue, Prof. Chusheng Huang and Prof. Ying Li

      Article first published online: 15 FEB 2012 | DOI: 10.1002/asia.201101056

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      One thing leads to another: Bis(benzannelated) 5,6-spiroketal skeletons can be constructed by an efficient cascade process involving an unprecedented CuI-catalyzed intramolecular alkyne hydroalkoxylation and an asymmetric hetero-Diels–Alder cycloaddition. The method yields a series of diversely functionalized spiroketals from two readily available open-chained starting materials in good yields and excellent diastereoselectivities.

    9. Fluorescent Complexes

      An Extremely Bright Heteroleptic Bis(dipyrrinato)zinc(II) Complex (pages 907–910)

      Shinpei Kusaka, Dr. Ryota Sakamoto, Dr. Yasutaka Kitagawa, Prof. Dr. Mitsutaka Okumura and Prof. Dr. Hiroshi Nishihara

      Article first published online: 29 MAR 2012 | DOI: 10.1002/asia.201200131

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      Let your light shine: The first example of a heteroleptic bis(dipyrrinato)zinc(II) complex, , was synthesized from two types of dipyrrins prepared by a new deboration protocol for BODIPYs. Complex showed a higher fluorescence quantum yield (0.76 in toluene) than the corresponding homoleptic complexes and 6. The superiority of as a luminophore was more prominent in more polar CH2Cl2 (see picture).

    10. Protease Inhibitors

      Target-Selective Photodegradation of HIV-1 Protease and Inhibition of HIV-1 Replication in Living Cells by Designed Fullerene–Sugar Hybrids (pages 911–914)

      Shuho Tanimoto, Satoshi Sakai, Eriko Kudo, Prof. Dr. Seiji Okada, Prof. Dr. Shuichi Matsumura, Dr. Daisuke Takahashi and Prof. Dr. Kazunobu Toshima

      Article first published online: 29 FEB 2012 | DOI: 10.1002/asia.201101043

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      Sweet degradation: A designed fullerene–sugar hybrid selectively caused the degradation of HIV-1 protease, an important target of anti-HIV therapy. Degradation was achieved at irradiation with long-wavelength UV (365 nm) or visible light (diffuse sunlight) in the absence of any additives and under neutral conditions. Moreover, the hybrid inhibited HIV-1 replication in living cells infected with HIV-1.

    11. Mercury Sensors

      Reaction-Based Two-Photon Fluorescent Probe for Turn-On Mercury(II) Sensing and Imaging in Live Cells (pages 915–918)

      Rong Huang, Xiaolong Zheng, Changcheng Wang, Renyi Wu, Shengyong Yan, Jiaqi Yuan, Prof. Xiaocheng Weng and Prof. Dr. Xiang Zhou

      Article first published online: 9 FEB 2012 | DOI: 10.1002/asia.201101028

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      Shine on: In this mercury(II) sensing approach, the non-fluorescent probe SAN undergoes Hg2+-promoted deprotection reaction, resulting in the formation of the two-photon-fluorescent product AAN. The system shows high sensitivity and selectivity and also can be used in live-cell environments.

  7. Full Papers

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

      Tridentate Thiolate Ligands: Application to the Synthesis of the Site-Differentiated [4Fe-4S] Cluster having a Hydrosulfide Ligand at the Unique Iron Center (pages 920–929)

      Tamaki Terada, Takuya Wakimoto, Tomohiko Nakamura, Kiyohisa Hirabayashi, Kaho Tanaka, Jichun Li, Prof. Dr. Tsuyoshi Matsumoto and Prof. Dr. Kazuyuki Tatsumi

      Article first published online: 5 APR 2012 | DOI: 10.1002/asia.201200039

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      Three′s a charm: Newly designed trithiols can be easily prepared and are useful for the preparation of crystalline [3:1] site-differentiated [4Fe-4S] clusters (see structure). Clusters bearing a HS ligand as well as the tridentate thiolates were synthesized as models of the [4Fe-4S] cluster in (R)-2-hydroxyisocaproyl-CoA dehydratase, and their molecular structures and redox properties have been elucidated.

    2. Antibacterial Agents

      Antibacterial Activities of Tellurium Nanomaterials (pages 930–934)

      Dr. Zong-Hong Lin, Chia-Hsin Lee, Hsin-Yun Chang and Prof. Huan-Tsung Chang

      Article first published online: 21 MAR 2012 | DOI: 10.1002/asia.201101006

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      Expanding the antibacterial arsenal: Four differently shaped Te nanomaterials (nanocubes, nanorices, nanopencils, and nanowires) that may find use as antibacterial reagents were prepared. The as-prepared materials exhibited antibacterial activity against E. coli as follows: nanocubes ≈ nanorices > nanopencils ≈ nanowires. Compared to Ag nanoparticles (Ag NPs) that are commonly used as antibacterial reagents, Te nanomaterials have higher antibacterial activity and lower toxicity.

    3. Anthracenes

      Chemistry of Anthracene–Acetylene Oligomers XX: Synthesis, Structures, and Self-Association of Anthracene–Anthraquinone Cyclic Compounds with Ethynylene Linkers (pages 935–943)

      Dr. Tetsuo Iwanaga, Kazuaki Miyamoto, Dr. Kazukuni Tahara, Koji Inukai, Satoshi Okuhata, Prof. Dr. Yoshito Tobe and Prof. Dr. Shinji Toyota

      Article first published online: 16 FEB 2012 | DOI: 10.1002/asia.201101000

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      A–A breakdown cover: π-Conjugated cyclic structures, which were constructed from two kinds of arene units and acetylene linkers, underwent self-association in solution because of intramolecular π⋅⋅⋅π interactions.

    4. Molecular Recognition

      Molecular Recognition of Hydrocarbon Guests by a Supramolecular Capsule Formed by the 4:4 Self-Assembly of Tris(Zn2+–Cyclen) and Trithiocyanurate in Aqueous Solution (pages 944–956)

      Prof. Dr. Shin Aoki, Satoshi Suzuki, Dr. Masanori Kitamura, Prof. Dr. Takeharu Haino, Motoo Shiro, Dr. Mohd Zulkefeli and Prof. Dr. Eiichi Kimura

      Article first published online: 6 FEB 2012 | DOI: 10.1002/asia.201100871

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      Be our guest: Molecular recognition of hydrocarbon guests by the 4:4 supramolecular complex of tris(Zn2+-cyclen) and trithiocyanurate is reported. Computational simulation of (2)12+–guest complexes supports its structural flexibility.

    5. Cyclization Mechanisms

      Reactivity of Bispropargyl Sulfones under Basic Conditions: Interplay Between Garratt–Braverman and Schmittel/Myers–Saito Cyclization Pathway (pages 957–965)

      Raja Mukherjee, Sayantan Mondal, Dr. Amit Basak, Dibyendu Mallick and Dr. Eluvathingal D. Jemmis

      Article first published online: 7 MAR 2012 | DOI: 10.1002/asia.201100903

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      Showing cleavage: We report a conformational constraint-based strategy developed by using computations (M06-2X/6-31+G*) to switch the selectivity from a Garratt–Braverman (GB) to a Myers–Saito (MS) or Schmittel (SCM) pathway (see scheme), which also results in greater DNA-cleavage activity. The preference for GB could be reinstated by easing the constraint with the help of spacers.

    6. Polyoxometalates

      Rare-Earth–Transition-Metal Organic–Inorganic Hybrids Based on Keggin-type Polyoxometalates and Pyrazine-2,3-dicarboxylate (pages 966–974)

      Shaowei Zhang, Dr. Junwei Zhao, Pengtao Ma, Prof. Dr. Jingyang Niu and Prof. Jingping Wang

      Article first published online: 9 FEB 2012 | DOI: 10.1002/asia.201100918

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      A rare find: Two types of organic–inorganic hybrid monovacant Keggin silicotungstates with both rare-earth–transition-metal heterometals and mixed ligands (H2pzda and ethylenediamine; pzda=pyrazine-2,3-dicarboxylate) were separated and characterized.

    7. Raman Spectroscopy

      Surface-Enhanced Raman Scattering (SERS) of Nitrothiophenol Isomers Chemisorbed on TiO2 (pages 975–981)

      Jefri S. Teguh, Fang Liu, Prof. Dr. Bengang Xing and Prof. Dr. Edwin K. L. Yeow

      Article first published online: 12 MAR 2012 | DOI: 10.1002/asia.201100934

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      Beneath the surface: The surface-enhanced Raman scattering (SERS) of nitrothiophenol isomers on TiO2 arose from a molecule-to-TiO2 charge-transfer reaction and was directly affected by the electron-withdrawing ability of the isomer.

    8. Solar Cells

      Benzotriazole-Bridged Sensitizers Containing a Furan Moiety for Dye-Sensitized Solar Cells with High Open-Circuit Voltage Performance (pages 982–991)

      Jiangyi Mao, Fuling Guo, Weijiang Ying, Dr. Wenjun Wu, Dr. Jing Li and Prof. Jianli Hua

      Article first published online: 10 FEB 2012 | DOI: 10.1002/asia.201100967

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      Let the light shine: Two new benzotriazole-bridged dyes containing a furan moiety for DSSCs have been synthesized. DSSCs based on the dye with a furan and branched alkyl chain showed a high open-circuit voltage of 834 mV (see picture). Most importantly, long-term stability these DSSCs with ionic-liquid electrolytes under 1000 h light-soaking was demonstrated and exhibited good photovoltaic performance of up to 5.06 % power conversion efficiency.

    9. Protein–Peptide Binding

      Resolving Multiple Protein–Peptide Binding Events: Implication for HLA-DQ2 Mediated Antigen Presentation in Celiac Disease (pages 992–999)

      Dr. Jianhao Wang, Xi Jin, Jiahui Liu, Prof. Chaitan Khosla and Prof. Jiang Xia

      Article first published online: 12 MAR 2012 | DOI: 10.1002/asia.201101041

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      Complexity resolved: The key step of antigen presentation in celiac disease is the binding of immunogenic gluten peptide to HLA-DQ2 protein through displacement of endogenous CLIP peptides. We developed capillary electrophoresis coupled to fluorescence detection to monitor this complex process for the first time. We showed that gluten peptide can be efficiently loaded on CLIP-bound DQ2 at neutral pH (on the surface of cells) but not at acidic pH (in the endosome).

    10. Mesostructures

      Temperature-Dependent Formation and Transformation of Mesostructures in Water–Ionic Liquid Mixtures (pages 1000–1008)

      Dr. Daniel R. Kattnig and Dr. Dariush Hinderberger

      Article first published online: 15 MAR 2012 | DOI: 10.1002/asia.201101040

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      Water effects: The temperature-dependent formation and transformation of mesostructures in binary mixtures of the ionic liquid ([bmim+][BF4]) and water are characterized by using electron paramagnetic resonance (EPR) spectroscopy on nitroxide radicals. EPR data of radicals before and after freezing and thawing reveal a transformation to long-lived mesostructures relaxing slowly to their equilibrium state of mesophase-separated IL-rich and bulk-like water regions.

    11. Friedel–Crafts Reaction

      Friedel–Crafts Acylation on Graphene (pages 1009–1012)

      Chun Kiang Chua and Prof. Martin Pumera

      Article first published online: 13 MAR 2012 | DOI: 10.1002/asia.201200096

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      Very Crafty! The Friedel–Crafts functionalization of graphene was performed by using polyphosphoric-acid/phosphorus-pentoxide with 4-aminobenzoic acid. High-resolution XPS, FTIR, and Raman spectroscopic analysis was used to confirm the functionalization reaction. These results could provide a framework for the future modification of graphene based on a mild-acylation technique.

    12. Batteries

      Mechanism of Lithium Storage in MoS2 and the Feasibility of Using Li2S/Mo Nanocomposites as Cathode Materials for Lithium–Sulfur Batteries (pages 1013–1017)

      Dr. Xiangpeng Fang, Dr. Xianwei Guo, Dr. Ya Mao, Dr. Chunxiu Hua, Dr. Lanyao Shen, Prof. Yongsheng Hu, Prof. Zhaoxiang Wang, Prof. Feng Wu and Prof. Liquan Chen

      Article first published online: 28 FEB 2012 | DOI: 10.1002/asia.201100796

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      Batteries not included: The recharge products of deeply discharged MoS2 were found to be metallic Mo and S. As Mo could not be oxidized below 3.0 V, Li2S and S were thought to be the sole redox couple in the cell, S+2 Li↔Li2S. The high cycling stability of the Li2S/Mo nanocomposite demonstrated the feasibility of using Li2S as an alternative to sulfur for lithium–sulfur batteries.

    13. Nanostructures

      Growth of Indium Oxide Nanowalls on Patterned Conducting Substrates: Towards Direct Fabrication of Gas Sensors (pages 1018–1025)

      Dr. Changlong Chen, Yuling Wei, Dr. Guoxin Sun and Baiqi Shao

      Article first published online: 10 FEB 2012 | DOI: 10.1002/asia.201100803

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      Great walls from China: By directly growing In2O3 nanowalls (see picture), which are comprised of vertically grown ultrathin single-crystalline In2O3 nanosheets, on patterned ITO substrates, electronic devices such as gas sensors can be easily constructed by the bottom-up method based on a smart bridgework-like strategy, which demonstrated a detection limit as low as 50 ppb to NO2 under mild conditions.

    14. DNA Synthesis

      The Thermodynamics of Translesion DNA Synthesis Past Major Adducts of Enantiomeric Analogues of Antitumor Cisplatin (pages 1026–1031)

      Dr. Jaroslav Malina, Dr. Olga Novakova, Prof. Dr. Giovanni Natile and Prof. Dr. Viktor Brabec

      Article first published online: 28 FEB 2012 | DOI: 10.1002/asia.201100886

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      A hard DNA's night: The thermodynamics of chirality-dependent translesion synthesis by DNA polymerases across antitumor analogs of cisplatin are described.

    15. Organic Semiconductors

      First-Principles Investigation of the Electronic and Conducting Properties of Oligothienoacenes and their Derivatives (pages 1032–1040)

      Jin-Dou Huang, Dr. Shu-Hao Wen and Prof. Ke-Li Han

      Article first published online: 15 FEB 2012 | DOI: 10.1002/asia.201100904

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      Strong as an Ox: Chemical oxidation of the thiophene ring of fused thiophenes and their derivatives could significantly improve their semiconductor properties, which suggests it may be a promising way to convert p-type semiconductors into ambipolar or n-type semiconductors.

    16. Total Synthesis

      Efficiently Synthesizing Lacto-Ganglio-Series Gangliosides by Using a Glucosyl Ceramide Cassette Approach: The Total Synthesis of Ganglioside X2 (pages 1041–1051)

      Shinya Nakashima, Dr. Hiromune Ando, Risa Saito, Hideki Tamai, Dr. Hideharu Ishida and Dr. Makoto Kiso

      Article first published online: 14 FEB 2012 | DOI: 10.1002/asia.201100928

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      Here the buddy comes: Structurally analogous gangliosides (X1 and X2) are associated with an amyotrophic lateral sclerosis (ALS)-like disorder. The synthesis of 30.6 mg X2 was achieved by using a glucosyl ceramide cassette approach.

    17. Natural Products

      Formal Synthesis of (−)-Englerin A and Cytotoxicity Studies of Truncated Englerins (pages 1052–1060)

      Dr. Jing Xu, Eduardo J. E. Caro-Diaz, Dr. Ayse Batova, Steven D. E. Sullivan and Prof. Dr. Emmanuel A. Theodorakis

      Article first published online: 13 MAR 2012 | DOI: 10.1002/asia.201101021

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      An enantioselective RhII-catalyzed [4+3] cycloaddition reaction between disubstituted furan 9 and chiral diazoester 10 constitutes the key steps in the synthesis of englerin A (1) and in the synthesis of truncated englerins (such as compound 17).

    18. Cross-Coupling

      Cross-Coupling of Aryllithiums with Aryl and Vinyl Halides in Flow Microreactors (pages 1061–1068)

      Dr. Aiichiro Nagaki, Yuya Moriwaki, Suguru Haraki, Akira Kenmoku, Naofumi Takabayashi, Atsushi Hayashi and Prof. Dr. Jun-Ichi Yoshida

      Article first published online: 29 FEB 2012 | DOI: 10.1002/asia.201101019

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      Orinoco flow: Space integration of lithiation and Murahashi coupling reactions by using a flow microreactor system enabled the cross-coupling of aryl halides with aryl or vinyl halides.

    19. Metal–Organic Frameworks

      Charge Matching on Designing Neutral Cadmium–Lanthanide–Organic Open Frameworks for Luminescence Sensing (pages 1069–1073)

      Hui Yang, Dr. Fei Wang, Yan-Xi Tan, Yao Kang, Prof. Dr. Tie-Hu Li and Prof. Dr. Jian Zhang

      Article first published online: 13 MAR 2012 | DOI: 10.1002/asia.201101002

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      Ln in charge! When designing structure through careful consideration of charge density matching, a simple replacement of metal from Cd2+ to Ln3+ in a building unit not only dramatically turns an anionic microporous framework into a neutral one (see picture) but also greatly enhances its functionality on luminescence sensing of organic solvents and metal ions.

    20. Donor–Acceptor Systems

      Naphthyl and Thienyl Units as Bridges for Metal-Free Dye-Sensitized Solar Cells (pages 1074–1084)

      Dr. Yung-Chung Chen, Yo-Hua Chen, Dr. Hsien-Hsin Chou, Dr. Sumit Chaurasia, Yuh S. Wen, Prof. Dr. Jiann T . Lin and Prof. Dr. Ching-Fa Yao

      Article first published online: 1 MAR 2012 | DOI: 10.1002/asia.201100972

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      Increasingly sensitive: A series of dipolar dyes containing a naphthyl entity in the conjugate spacer between a arylamine donor and a 2-cyanoacrylic acid acceptor have been synthesized and used as the sensitizers in dye-sensitized solar cells (DSSCs).

    21. Energetic Materials

      Synthesis, Characterization, and Energetic Properties of Salts of the 1-Cyanomethyl-1,1-dimethylhydrazinium Cation (pages 1085–1095)

      Dr. Carles Miró Sabaté, Dr. Henri Delalu and Dr. Erwann Jeanneau

      Article first published online: 1 MAR 2012 | DOI: 10.1002/asia.201100994

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      Full of energy: The energetic salts of the [(CH3)2N(CH2CN)NH2]+ cation (see figure) in this work have positive heats of formation, low sensitivities against impact and friction, and moderate performances and thermal stabilities, with low heats of explosion. They might be of interest in the field of energetic materials.

    22. Core–Shell Systems

      Photoinduced Electron Transfer from the Inorganic Core to the Organic Shell of Hybrid Core–Shell Nanoparticles: Impedance Spectroscopy (pages 1096–1102)

      Asim Guchhait and Prof. Amlan J. Pal

      Article first published online: 21 MAR 2012 | DOI: 10.1002/asia.201101008

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      Shell game: In hybrid core–shell nanoparticles, photoinduced electron transfer from an inorganic core to an organic shell layer has been studied through impedance spectroscopy. A correlation between the electron-transfer process and changes in the resistive and dielectric properties upon illumination has been observed.

    23. Diamination of Alkenes

      Iodine(III)-Promoted Intermolecular Diamination of Alkenes (pages 1103–1111)

      Dr. José A. Souto, Yolanda González, Dr. Alvaro Iglesias, Debora Zian, Anton Lishchynskyi and Prof. Dr. Kilian Muñiz

      Article first published online: 1 MAR 2012 | DOI: 10.1002/asia.201101025

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      Diamination of alkenes made easy! The simple combination of the hypervalent iodine reagents PhI(OAc)2 or PhI(OAc)NTs2 with HNTs2 generates an unprecedentedly robust tool for the rapid and productive diamination of alkenes. Reactions include (clockwise from top right) styrenes, terminal alkenes, functionalized and conjugated alkenes, as well as internal alkenes.

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      Preview: Chem. Asian J. 6/2012 (page 1115)

      Article first published online: 26 APR 2012 | DOI: 10.1002/asia.201290015

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