Angewandte Chemie International Edition

Cover image for Vol. 50 Issue 4

Special Issue: Women in Chemistry

January 24, 2011

Volume 50, Issue 4

Pages 779–966

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Author Profile
    8. News
    9. Book Review
    10. Highlights
    11. Minireview
    12. Review
    13. Communications
    14. Preview
    15. Back Cover
    1. Cover Picture: Metal-Free, Cooperative Asymmetric Organophotoredox Catalysis with Visible Light (Angew. Chem. Int. Ed. 4/2011) (page 779)

      Matthias Neumann, Stefan Füldner, Prof. Dr. Burkhard König and Dr. Kirsten Zeitler

      Article first published online: 1 DEC 2010 | DOI: 10.1002/anie.201006295

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      Highly enantioselective α-alkylations of aldehydes are achieved through the cooperative combination of an organocatalytic cycle and a photocatalytic cycle—represented by the slices of citrus fruits in the “catalytic cocktail”. The beautifully orange-colored photocatalyst eosin Y and green-light irradiation are used to replace noble-metal catalysts, as explained by K. Zeitler et al. in their Communication on page 951 ff. (Cover graphics were designed in cooperation with Georg Neumann.)

  2. Inside Cover

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Author Profile
    8. News
    9. Book Review
    10. Highlights
    11. Minireview
    12. Review
    13. Communications
    14. Preview
    15. Back Cover
    1. Inside Cover: Electrostatic Stabilization of a Native Protein Structure in the Gas Phase (Angew. Chem. Int. Ed. 4/2011) (page 780)

      Dr. Kathrin Breuker, Sven Brüschweiler and Priv.-Doz. Dr. Martin Tollinger

      Article first published online: 23 NOV 2010 | DOI: 10.1002/anie.201006708

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      Electron capture dissociation mass spectrometry data provide information about the three-dimensional structure of the three-helix bundle protein KIX. In their Communication on page 873 ff., K. Breuker and co-workers report on the stabilization of the protein by electrostatic interactions after transfer into the gas phase.

  3. Editorial

    1. Top of page
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    4. Editorial
    5. Graphical Abstract
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    1. You have free access to this content
      Editorial: Women in Chemistry (page 782)

      Diane Smith

      Article first published online: 19 JAN 2011 | DOI: 10.1002/anie.201100133

  4. Graphical Abstract

    1. Top of page
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    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
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    9. Book Review
    10. Highlights
    11. Minireview
    12. Review
    13. Communications
    14. Preview
    15. Back Cover
    1. Graphical Abstract: Angew. Chem. Int. Ed. 4/2011 (pages 785–794)

      Article first published online: 19 JAN 2011 | DOI: 10.1002/anie.201190004

  5. News

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Author Profile
    8. News
    9. Book Review
    10. Highlights
    11. Minireview
    12. Review
    13. Communications
    14. Preview
    15. Back Cover
  6. Author Profile

    1. Top of page
    2. Cover Picture
    3. Inside Cover
    4. Editorial
    5. Graphical Abstract
    6. News
    7. Author Profile
    8. News
    9. Book Review
    10. Highlights
    11. Minireview
    12. Review
    13. Communications
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    15. Back Cover
    1. Annie Powell (page 800)

      Article first published online: 18 JAN 2011 | DOI: 10.1002/anie.201005774

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      “My science “heroes” are my co-workers in my group. The biggest problem that scientists face is to keep an open and prepared mind …” This and more about Annie Powell can be found on page 800.

  7. News

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    4. Editorial
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    10. Highlights
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    12. Review
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  8. Book Review

    1. Top of page
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  9. Highlights

    1. Top of page
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    1. Metallodrugs

      Activating Platinum Anticancer Complexes with Visible Light (pages 804–805)

      Prof. Dr. Susan J. Berners-Price

      Article first published online: 23 DEC 2010 | DOI: 10.1002/anie.201004552

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      The next generation: Classical PtII anticancer compounds contain cis diam(m)ine ligands and are activated by ligand-substitution reactions. PtIV diam(m)ine diazido dihydroxo complexes are nontoxic to cells until activated by light. Replacement of the diam(m)ine ligands in a trans configuration by pyridine gives a complex that is potently cytotoxic when irradiated with visible light and which has potential as a photochemotherapeutic agent.

    2. Solid-State Chemistry

      Luminescent Semiconductors (pages 806–808)

      Prof. Dr. Claudia Wickleder

      Article first published online: 22 DEC 2010 | DOI: 10.1002/anie.201005167

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      Bright light! Semiconductor materials are playing an ever-increasing role in optical applications, but the number of systems used is limited. The AZrPS6 class of compounds (A=K, Rb, Cs) shows extremely interesting optical properties (see picture) and could thus smooth the way to the use of more complex materials.

    3. Catalytic Directing Groups

      A New Direction in Enantioselective Catalysis: Scaffolding Ligands in Olefin Hydroformylation (pages 809–812)

      Charles S. Yeung and Prof. Vy M. Dong

      Article first published online: 17 JAN 2011 | DOI: 10.1002/anie.201006489

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      A designer phosphine ligand capable of bonding covalently to an olefin substrate directed rhodium-catalyzed hydroformylation to generate branched aldehydes with high regio- and enantioselectivity. The use of such scaffolding ligands opens up new directions in asymmetric synthesis.

  10. Minireview

    1. Top of page
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    1. Photochemistry

      Keys for Unlocking Photolabile Metal-Containing Cages (pages 814–824)

      Dr. Katie L. Ciesienski and Prof. Katherine J. Franz

      Article first published online: 17 DEC 2010 | DOI: 10.1002/anie.201002542

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      The key to the door: Photolabile metal cages utilize light as the “key” to unlock a change in the coordination environment around the metal center. These triggerable agents can be useful tools for manipulating the bioavailability of metals or their coordinating ligands in order to study biological pathways or for potential therapeutic purposes.

  11. Review

    1. Top of page
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    1. Nanotechnology

      Oxide Nanomaterials: Synthetic Developments, Mechanistic Studies, and Technological Innovations (pages 826–859)

      Prof. Dr. Greta R. Patzke, Dr.  Ying Zhou, Roman Kontic and Franziska Conrad

      Article first published online: 25 NOV 2010 | DOI: 10.1002/anie.201000235

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      Plans for profit: Oxide nanomaterials (see picture) offer a limitless spectrum of structures, properties, and applications. In recent years, new synthetic approaches have been developed to access them and the most sophisticated in situ monitoring techniques are applied to understand their growth processes. This Review shows how these developments open up new design perspectives for the technical application of oxide nanomaterials in all current fields.

  12. Communications

    1. Top of page
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    1. Subcellular IR Spectromicroscopy

      Subcellular IR Imaging of a Metal–Carbonyl Moiety Using Photothermally Induced Resonance (pages 860–864)

      Prof. Dr. Clotilde Policar, Dr. Jenny Birgitta Waern, Marie-Aude Plamont, Sylvain Clède, Céline Mayet, Dr. Rui Prazeres, Dr. Jean-Michel Ortega, Dr. Anne Vessières and Dr. Alexandre Dazzi

      Article first published online: 12 OCT 2010 | DOI: 10.1002/anie.201003161

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      Some like it hot! The photothermally induced resonance technique, in which an AFM microscope is coupled to a tunable pulsed IR laser, allows IR mapping and gives access to local IR spectra at the subcellular level. A metal–carbonyl compound was internalized in cells and detected in the cell nucleus thanks to its IR signature. The local IR spectrum at the nucleus showed the characteristic IR bands of the {Re(CO)3} unit.

    2. Dynamic Resolution

      Stereoselective Coordination of C5-Symmetric Corannulene Derivatives with an Enantiomerically Pure [RhI(nbd*)] Metal Complex (pages 865–867)

      Dr. Davide Bandera, Prof. Dr. Kim K. Baldridge, Priv.-Doz. Dr. Anthony Linden, Prof. Dr. Reto Dorta and Prof. Dr. Jay S. Siegel

      Article first published online: 5 JAN 2011 | DOI: 10.1002/anie.201006877

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      Catching the bowl! Enantiopure RhI dimethylnorbornadiene fragments selectively catch interconverting enantiomers of C5-sym-pentasubstituted corannulene derivatives in one bowl form and allow the observation and isolation of enantiopure metal-buckybowl complexes. A quantum mechanical model (see picture) predicts the mechanism of molecular dynamics and degree of stereoselective recognition.

    3. Nanocrystal Structures

      Chemical Imaging at Atomic Resolution as a Technique To Refine the Local Structure of Nanocrystals (pages 868–872)

      Dr. Susana Trasobares, Dr. Miguel López-Haro, Dr. Mathieu Kociak, Dr. Katia March, Dr. Francisco de La Peña, Dr. Jose A. Perez-Omil, Dr. Jose J. Calvino, Nathan R. Lugg, Dr. Adrian J. D'Alfonso, Prof. Leslie J. Allen and Prof. Christian Colliex

      Article first published online: 11 JAN 2011 | DOI: 10.1002/anie.201004502

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      New order: Ce2Zr2O8 nanocrystals are characterized by aberration-corrected electron microscopy, core-loss electron energy-loss spectroscopy, and simulations. Direct chemical evidence of an ordered cation sublattice in nanosized (20–30 nm) crystallites is found for the first time. Local deviations in the chemical composition are also detected, with Zr occupying Ce sites (see scheme).

    4. Gaseous Proteins

      You have full text access to this OnlineOpen article
      Electrostatic Stabilization of a Native Protein Structure in the Gas Phase (pages 873–877)

      Dr. Kathrin Breuker, Sven Brüschweiler and Priv.-Doz. Dr. Martin Tollinger

      Article first published online: 9 NOV 2010 | DOI: 10.1002/anie.201005112

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      One, two, three, whee! After transfer into the gas phase, the three-helix bundle protein KIX is sufficiently stabilized by electrostatic interactions to compensate for the loss of hydrophobic bonding. It thus retains its global fold on a timescale of more than 4 s.

    5. Silver Clusters

      Doubly Charged Silver Clusters Stabilized by Tryptophan: Ag42+ as an Optical Marker for Monitoring Particle Growth (pages 878–881)

      Alexander Kulesza, Dr. Roland Mitrić, Prof. Vlasta Bonačić-Koutecký, Bruno Bellina, Dr. Isabelle Compagnon, Prof. Michel Broyer, Dr. Rodolphe Antoine and Prof. Philippe Dugourd

      Article first published online: 22 DEC 2010 | DOI: 10.1002/anie.201005419

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      The effect of the environment on doubly charged metallic subunits has been investigated in the gas phase through a combined experimental and theoretical study. The hybrid system consisting of an Ag42+ cluster and a tryptophan molecule exhibits an unambiguous optical fingerprint, which can be useful to gain mechanistic insights into the aggregation and growth of nanoparticles (see figure; blue N, gray Ag, green C, red O, turquoise H).

    6. Drug Delivery

      Polyvalent Nucleic Acid/Mesoporous Silica Nanoparticle Conjugates: Dual Stimuli-Responsive Vehicles for Intracellular Drug Delivery (pages 882–886)

      Cuie Chen, Jie Geng, Fang Pu, Xinjian Yang, Prof. Dr. Jinsong Ren and Prof. Dr. Xiaogang Qu

      Article first published online: 14 DEC 2010 | DOI: 10.1002/anie.201005471

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      Blocked tubes: Attachment of self-complementary duplex DNA to the openings of mesoporous silica nanoparticles results in a cap for trapping guest molecules. The cargo can be released either by thermal stimuli or by the introduction of DNase I, both of which open the capping DNA structure (see picture).

    7. Uranyl Reduction

      Single-Electron Uranyl Reduction by a Rare-Earth Cation (pages 887–890)

      Prof. Polly L. Arnold, Dr. Emmalina Hollis, Dr. Fraser J. White, Dr. Nicola Magnani, Prof. Roberto Caciuffo and Dr. Jason B. Love

      Article first published online: 22 DEC 2010 | DOI: 10.1002/anie.201005511

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      Reducing the irreducible: Incorporation of a lanthanide cation into the vacant coordination pocket of a uranyl Pacman complex results in single electron reduction to form stable pentavalent uranyl–rare-earth complexes with uranyl–oxo–rare-earth bonds (see scheme; py=pyridine, R=SiMe3).

    8. Nanomedicine

      Multifunctional Gold Nanoshells on Silica Nanorattles: A Platform for the Combination of Photothermal Therapy and Chemotherapy with Low Systemic Toxicity (pages 891–895)

      Dr. Huiyu Liu, Dong Chen, Dr. Linlin Li, Dr. Tianlong Liu, Longfei Tan, Xiaoli Wu and Prof. Fangqiong Tang

      Article first published online: 25 NOV 2010 | DOI: 10.1002/anie.201002820

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      Magic bullets: A drug-loaded structure comprising a PEGylated (PEG=polyethylene glycol) gold nanoshell on silica nanorattle spheres (GSNs; see picture) combines remote-controlled photothermal therapy with chemotherapy. Tumor cells are killed with higher efficacy and less toxicity than the free drug.

    9. Two-Step Transitions

      A Symmetry-Breaking Spin-State Transition in Iron(III) (pages 896–900)

      Dr. Michael Griffin, Stephen Shakespeare, Dr. Helena J. Shepherd, Dr. Charles J. Harding, Dr. Jean-François Létard, Dr. Cédric Desplanches, Dr. Andrés E. Goeta, Prof. Judith A. K. Howard, Prof. Dr. Annie K. Powell, Dr. Valeriu Mereacre, Prof. Dr. Yann Garcia, Dr. Anil D. Naik, Dr. Helge Müller-Bunz and Dr. Grace G. Morgan

      Article first published online: 12 NOV 2010 | DOI: 10.1002/anie.201005545

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      Stepping up: A two-step magnetic spin transition with accompanying structural phase transitions is reported for the first time for FeIII. The transitions are observed at 187 K and 90 K on cooling with a hysteretic transition recorded upon heating during the first crossover at 106 K. The intermediate phase persists over 97 K and contains an unprecedented [HS-HS-LS] motif with tripling of the unit cell.

    10. Disease Mechanisms

      Copper(II) Coordination to Amyloid β: Murine versus Human Peptide (pages 901–905)

      Hélène Eury, Dr. Christian Bijani, Prof. Dr. Peter Faller and Dr. Christelle Hureau

      Article first published online: 9 DEC 2010 | DOI: 10.1002/anie.201005838

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      Be wary of mice: At physiological pH values, CuII binding to the human and murine amyloid β peptides differs significantly. The key mutation R5G in the murine CuII species results in coordination of the amidyl nitrogen atom of the Gly5[BOND]His6 bond (see scheme). The higher binding affinity observed for the murine peptide limits the relevance of transgenic mice (in which both peptides coexist) as models for Alzheimer's disease.

    11. Gold Catalysis

      Flexible Gold-Catalyzed Regioselective Oxidative Difunctionalization of Unactivated Alkenes (pages 906–910)

      Teresa de Haro and Prof. Dr. Cristina Nevado

      Article first published online: 17 JAN 2011 | DOI: 10.1002/anie.201005763

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      AuI/AuIIIcatalytic cycles can trigger three highly regioselective alkene difunctionalization processes that involve the formation of C(sp3)[BOND]O, C(sp3)[BOND]N, and C(sp3)[BOND]C(sp2) bonds. The reaction can proceed by reductive elimination on the oxidized gold center with complete retention of the configuration or through two subsequent nucleophilic substitution reactions via an aziridine intermediate.

    12. Gold-Catalyzed Cyclopenta- and Cycloheptannulation Cascades: A Stereocontrolled Approach to the Scaffold of Frondosins A and B (pages 911–915)

      David Garayalde, Karolin Krüger and Prof. Dr. Cristina Nevado

      Article first published online: 7 DEC 2010 | DOI: 10.1002/anie.201006105

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      Golden cascades: Two diastereoselective gold-catalyzed cascade processes in which propargyl acetates react with alkenes or 1,4-dienes afford highly substituted five- and seven-membered rings, respectively (see scheme). The concerted nature of the gold-catalyzed Cope rearrangement has been used in the formal enantioselective synthesis of marine norsesquiterpenoids Frondosins A and B.

    13. N2 Activation

      Unusually Strong Binding of Dinitrogen to a Ruthenium Center (pages 916–919)

      Johanna M. Blacquiere, Carolyn S. Higman, Dr. Serge I. Gorelsky, Nicholas J. Beach, Dr. Scott J. Dalgarno and Prof. Deryn E. Fogg

      Article first published online: 29 DEC 2010 | DOI: 10.1002/anie.201005640

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      Stuck on Ru: The lability of the N2 ligand is thought to limit the efficacy of late-transition-metal complexes for the catalytic activation of N2. However, complex 1 is found to bind N2 with unprecedented strength. This species resists displacement of N2 by CO at room temperature, while computational and experimental data suggest that the Ru–N2 binding is stronger than the Ru–IMes binding. IMes=N,N′-bis(mesityl)imidazol-2-ylidene.

    14. Borylcyanocuprates

      Borylcyanocuprate in a One-Pot Carboboration by a Sequential Reaction with an Electron-Deficient Alkyne and an Organic Carbon Electrophile (pages 920–923)

      Yuri Okuno, Dr. Makoto Yamashita and Prof. Dr. Kyoko Nozaki

      Article first published online: 22 DEC 2010 | DOI: 10.1002/anie.201005667

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      A key reactive species, lithium borylcyanocuprate, was isolated and fully characterized in a one-pot carboboration of alkynes. The carboboration involves a boryllithium, CuCN⋅2 LiCl, an ester-substituted alkyne, and an organic electrophile (see scheme). By changing the reaction temperature, the syn/anti ratio of the carboborated products can also be changed.

    15. Electrochemistry

      Electrochemical Allylation Reactions of Simple Imines in Aqueous Solution Mediated by Nanoscale Zinc Architectures (pages 924–927)

      Prof. Dr. Jing-Mei Huang, Xu-Xiao Wang and Yi Dong

      Article first published online: 25 NOV 2010 | DOI: 10.1002/anie.201004852

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      I zinc we're alone now: The title reactions were achieved in an undivided cell fitted with a pair of zinc electrodes in aqueous solution. A preliminary study on the relationship of reaction activity and surface morphology showed that the deposited zinc powders with nanoscale architectures had very high activity.

    16. Umpolung Reaction

      Nucleophilic α-Arylation and α-Alkylation of Ketones by Polarity Inversion of N-Alkoxyenamines: Entry to the Umpolung Reaction at the α-Carbon Position of Carbonyl Compounds (pages 928–931)

      Tetsuya Miyoshi, Takayuki Miyakawa, Dr. Masafumi Ueda and Prof. Dr. Okiko Miyata

      Article first published online: 23 NOV 2010 | DOI: 10.1002/anie.201004374

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      A new aspect of enamine chemistry: The formation of N-alkoxyenamines from ketones has led to an efficient umpolung reaction. The alkylation of N-alkoxyenamines with trialkylaluminum compounds proceeded smoothly and gave α-alkylated ketones (see scheme). This reaction offers a simple transformation of ketones into α-substituted ketones without the need to isolate enamines and intermediary imines.

    17. C–S Bond Formation

      Carbon–Sulfur Reductive Elimination from Palladium(IV) Sulfinate Complexes (pages 932–934)

      Dr. Xiaodan Zhao and Prof. Vy M. Dong

      Article first published online: 29 NOV 2010 | DOI: 10.1002/anie.201005489

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      Sulfurin succotash: The oxidation of PdII complexes with sulfonyl chlorides leads to a series of stable palladium(IV) sulfinate complexes. These complexes undergo reductive elimination to afford products with C[BOND]S, C[BOND]C, and C[BOND]Cl bonds, as well as a desulfitated product (see scheme; Py=pyridyl, Pd gray, N blue, S yellow, O red).

    18. Hypergolics

      Dicyanoborate-Based Ionic Liquids as Hypergolic Fluids (pages 935–937)

      Dr. Yanqiang Zhang and Prof. Dr. Jean'ne M. Shreeve

      Article first published online: 12 NOV 2010 | DOI: 10.1002/anie.201005748

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      Explosive though stable: Dicyanoborate-based ionic liquids are hypergolic fuels in the presence of white fuming nitric acid as oxidizer (see high-speed picture of the ignition process). With long liquid ranges, low viscosities, and short ignition delay times, these thermally and hydrolytically stable ionic liquids appear to be very promising substitutes for hydrazine and its derivatives as bipropellants.

    19. Structure Elucidation

      Gephyronic Acid, a Missing Link between Polyketide Inhibitors of Eukaryotic Protein Synthesis (Part I): Structural Revision and Stereochemical Assignment of Gephyronic Acid (pages 938–941)

      Lionel Nicolas, Timo Anderl, Dr. Florenz Sasse, Heinrich Steinmetz, Dr. Rolf Jansen, Prof. Gerhard Höfle, Prof. Sabine Laschat and Prof. Richard E. Taylor

      Article first published online: 23 DEC 2010 | DOI: 10.1002/anie.201005530

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      Solving the puzzle: The correct structure and configuration of the natural product gephyronic acid has been determined by NMR analysis and correlation with synthetic reference compounds, as well as with myriaporone 4 and tedanolide. Gephyronic acid, isolated from culture supernatants of Archangium gephyra, displays intriguing antibiotic activity.

    20. Natural Product Synthesis

      Gephyronic Acid, a Missing Link between Polyketide Inhibitors of Eukaryotic Protein Synthesis (Part II): Total Synthesis of Gephyronic Acid (pages 942–945)

      Timo Anderl, Lionel Nicolas, Johanna Münkemer, Dr. Angelika Baro, Dr. Florenz Sasse, Heinrich Steinmetz, Dr. Rolf Jansen, Prof. Gerhard Höfle, Prof. Richard E. Taylor and Prof. Sabine Laschat

      Article first published online: 29 DEC 2010 | DOI: 10.1002/anie.201005605

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      19 steps in the longest linear sequence are required in the 27 step total synthesis of gephyronic acid. A key step is a diastereodifferentiating Mukaiyama aldol reaction of an aldehyde and an enolsilane (see picture, PG: protecting group). The strongly cytotoxic target compound is a structural relative of the polyketide tedanolide and was isolated from the myxobacterium Archangium gephyra.

    21. Light from Thin Assemblies

      Switching On Luminescence by the Self-Assembly of a Platinum(II) Complex into Gelating Nanofibers and Electroluminescent Films (pages 946–950)

      Dr. Cristian A. Strassert, Chen-Han Chien, Dr. Maria D. Galvez Lopez, Dimitrios Kourkoulos, Dr. Dirk Hertel, Prof. Dr. Klaus Meerholz and Prof. Luisa De Cola

      Article first published online: 27 DEC 2010 | DOI: 10.1002/anie.201003818

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      A platinum(II) emitter is able to self-assemble into gelating nanofibers, leading to an unprecedented 90 % photoluminescence quantum yield. Electroluminescent devices processed in solution can be doped with the aforementioned complex. Picture: a) Emission (—) and excitation spectra (- - - -) and photos of the gel, b) REM, and c) TEM images of the nanofibers.

    22. Photocatalysis

      Metal-Free, Cooperative Asymmetric Organophotoredox Catalysis with Visible Light (pages 951–954)

      Matthias Neumann, Stefan Füldner, Prof. Dr. Burkhard König and Dr. Kirsten Zeitler

      Article first published online: 28 SEP 2010 | DOI: 10.1002/anie.201002992

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      The dawn of old stars: Classic xanthene dyes like eosin Y (gr. εoς=goddess of dawn) and green-light irradiation can replace precious metal complexes for the organocatalytic asymmetric α-alkylation of aldehydes, thus rendering the process purely organic.

    23. Ternary Cluster Anions

      Neither Electron-Precise nor in Accordance with Wade–Mingos Rules: The Ternary Cluster Anion [Ni2Sn7Bi5]3− (pages 955–959)

      Felicitas Lips and Prof. Dr. Stefanie Dehnen

      Article first published online: 10 DEC 2010 | DOI: 10.1002/anie.201005496

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      The birdcage: The title anion, which contains two endohedral d10 metal atoms, is the second known ternary cluster anion comprising only metal atoms (see picture: Sn orange, Sn/Bi blue, Ni black). The K([2.2.2]crypt) salt was obtained upon reaction of the binary precursor [Sn2Bi2]2− with [Ni(cod)2] in ethylenediamine/toluene by a complicated fragmentation/re-arrangement process. X-ray diffraction and DFT calculations confirm the composition of the anion.

    24. Intermetalloid Clusters

      [Eu@Sn6Bi8]4−: A Mini-Fullerane-Type Zintl Anion Containing a Lanthanide Ion (pages 960–964)

      Felicitas Lips, Prof. Dr. Rodolphe Clérac and Prof. Dr. Stefanie Dehnen

      Article first published online: 9 DEC 2010 | DOI: 10.1002/anie.201005655

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      La cage aux folles: The [Eu@Sn6Bi8]4− anion (see picture: Sn/Bi blue/orange, Eu black) is the first example of an intermetalloid cluster anion that embeds a lanthanide ion in the solid state. Magnetic measurements and calculations both point to an S=7/2 ground state and indicate ionic interactions of the EuII ion with the main-group-metal cage. ESI mass spectrometry suggest that the cage forms from two seven-atom hemispheres.

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    1. Preview: Angew. Chem. Int. Ed. 5/2011 (page 965)

      Article first published online: 19 JAN 2011 | DOI: 10.1002/anie.201190005

  14. Back Cover

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    1. Back Cover: Stereoselective Coordination of C5-Symmetric Corannulene Derivatives with an Enantiomerically Pure [RhI(nbd*)] Metal Complex (Angew. Chem. Int. Ed. 4/2011) (page 966)

      Dr. Davide Bandera, Prof. Dr. Kim K. Baldridge, Priv.-Doz. Dr. Anthony Linden, Prof. Dr. Reto Dorta and Prof. Dr. Jay S. Siegel

      Article first published online: 17 JAN 2011 | DOI: 10.1002/anie.201100017

      Thumbnail image of graphical abstract

      Guided not by a foggy chiral memory but acting out of cold thermokinetic instinct, an enantiopure diene–metal complex, which barely registers a chiroptical signal, strikes adroitly at the heart of a floppy chiral corannulene, as it flails in form from right to left; thus ensues the resolution of the buckybowl's dynamic dance. Symmetry is lost in the recognition of a face, and the CD signature rises to reveal one hand, as described by K. K. Baldridge, J. S. Siegel et al. in their Communication on page 865 ff.

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