ChemCatChem

Cover image for Vol. 5 Issue 1

January 2013

Volume 5, Issue 1

Pages 1–354

  1. Cover Pictures

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. You have free access to this content
      Cover Picture: Remarkable Improvement of Catalytic Performance for a New Cobalt-Decorated Cu/HMS Catalyst in the Hydrogenation of Dimethyloxalate (ChemCatChem 1/2013) (page 1)

      Chao Wen, Yuanyuan Cui, Dr. Anyuan Yin, Prof. Kangnian Fan and Prof. Dr. Wei-Lin Dai

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290050

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      The sky's the limit! The cover picture shows the remarkable improvement in performance of a copper–cobalt bimetallic catalyst with only 1 % cobalt decoration for the catalytic hydrogenation of dimethyloxalate to ethylene glycol. In their Communication on p. 138 ff., W.-L. Dai et al. describe how a tiny amount of metallic cobalt can greatly promote the activation of molecular hydrogen and provide more active hydrogen atoms to react with adsorbed dimethyloxalate molecules. Intimate interactions between copper and cobalt and a high content of metallic cobalt species can be obtained by using the co-ammonia-evaporation approach, which could open up new avenues for the preparation of Cu-Co binary-alloy nanoparticles and provide an efficient catalyst with great potential for the industrial synthesis of ethylene glycol from syngas.

    2. You have free access to this content
      Inside Cover: Palladium-Catalyzed, Ligand-Controlled Chemoselective Oxidative Coupling Reactions of Benzene Derivatives with Acrylamides under an Oxygen Atmosphere (ChemCatChem 1/2013) (page 2)

      Seiichiro Harada, Hiroki Yano and Dr. Yasushi Obora

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290051

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      Get cooking with catalysis! The cover picture shows a ligand-controlled chemoselective oxidative coupling reaction. Described is the addition of different amounts of the acacH ligand (illustrated as a “spice” from the spoon) to produce the mono- and diarylated oxidative coupling products in a “pan”. In their Communication on p. 121 ff., S. Harada, H. Yano, and Y. Obora describe a facile approach to cinnamamides catalyzed by a Pd/acacH/O2 system.

    3. You have free access to this content
      Inside Back Cover: Mechanistic Studies on Chabazite-Type Methanol-to-Olefin Catalysts: Insights from Time-Resolved UV/Vis Microspectroscopy Combined with Theoretical Simulations (ChemCatChem 1/2013) (page 355)

      Veronique Van Speybroeck, Karen Hemelsoet, Kristof De Wispelaere, Qingyun Qian, Jeroen Van der Mynsbrugge, Bart De Sterck, Bert M. Weckhuysen and Michel Waroquier

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290053

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      Shiny disco catalysts! The cover picture shows a cationic hydrocarbon pool species of increasing size and methylation degree confined in a zeolitic cage. In their Full Paper on p. 173 ff., V. Van Speybroek, B. M. Weckhuysen et al. explain that these aromatic hydrocarbon species are reaction intermediates, coke precursors, or both, for the methanol-to-olefin process. They absorb at specific wavelengths and can be followed by in situ UV/Vis microspectroscopy. Experimentally derived activation energies for their formation correlate very well with calculated kinetic rate coefficients for methylation reactions. Our results show that the zeolite cage plays a decisive role in their activity.

    4. You have free access to this content
      Back Cover: Magnetic Polystyrene Nanosphere Immobilized TEMPO: A Readily Prepared, Highly Reactive and Recyclable Polymer Catalyst in the Selective Oxidation of Alcohols (ChemCatChem 1/2013) (page 356)

      Zhi Zheng, Prof. Jianli Wang, Miao Zhang, Lixin Xu and Prof. Jianbing Ji

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290054

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      An alco-hole in one The cover picture shows the use of 2,2,6,6-tetramethyl-piperidine-1-oxyl-modified polymer nanospheres (TEMPO/MNPs) in alcohol oxidation. In their Full Paper on p. 307 ff., J. Wang et al. describe the preparation, characterization, and catalytic studies of TEMPO/MNPs. The catalyst exhibits similar activity and versatility to the homogeneous TEMPO analogues, and its magnetic property ensures the catalyst recycling by simple magnetic decantation.

  2. Editorials

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. You have free access to this content
      Let the Catalysis Continue! (pages 3–5)

      Lois O'Leary, Dr. Michael A. Rowan and Dr.  Peter Gölitz

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201208888

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      Editorial 2013: We give a taster of what is to come in 2013 and celebrate ChemCatChem's 2012 successes. As we launch into 2013 with this bumper issue, we look forward to supporting new and exciting developments in and between heterogeneous, homogeneous, bio/enzymatic, and nanocatalysis.

    2. You have free access to this content
      New Editorial Board Members: Refreshing our Catalyst! (pages 6–8)

      Luis A. Oro, Bert Weckhuysen and Uwe Bornscheuer

      Article first published online: 20 DEC 2012 | DOI: 10.1002/cctc.201200842

      Transfer season opens… ChemCatChem picks up new board members. The first four years of ChemCatChem has come to pass and we will be broadening our editorial board to take in a wider catalysis scope.

  3. Graphical Abstract

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Graphical Abstract: ChemCatChem 1/2013 (pages 11–21)

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290049

  4. Corrigendum

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. You have free access to this content
      Corrigendum: DNA-Mediated Palladium Nanoparticles as an Efficient Catalyst for Hydrogenation- and Suzuki–Miyaura Coupling Reactions (page 21)

      Hisanori Itoh, Hironori Maeda, Shinya Yamada and Dr. Yoji Hori

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201200882

      This article corrects:
  5. News

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Spotlights on our sister journals: ChemCatChem 1/2013 (pages 24–26)

      Article first published online: 23 DEC 2012 | DOI: 10.1002/cctc.201290052

  6. Reviews

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Organometallic Ruthenium Nanoparticles: A Comparative Study of the Influence of the Stabilizer on their Characteristics and Reactivity (pages 28–45)

      Dr. Patricia Lara, Dr. Karine Philippot and Dr. Bruno Chaudret

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cctc.201200666

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      Fishing for more than COD: An overview of our group's efforts in the synthesis of ruthenium nanoparticles of controlled size and surface state using different types of stabilizers is presented. The influence of N-, S-, Si-, P-, and C- containing ligands as coordinating atoms to the metal surface, on their stabilization, as well as on their surface reactivity, is reported in comparison with sterically-stabilized Ru nanoparticles.

    2. Stabilized Laccases as Heterogeneous Bioelectrocatalysts (pages 46–60)

      Dr. Lorena Betancor, Dr. Glenn R. Johnson and Dr. Heather R. Luckarift

      Article first published online: 11 DEC 2012 | DOI: 10.1002/cctc.201200611

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      Locking down laccases: Laccases offer remarkable biocatalytic diversity, but effectively harnessing these versatile catalysts requires methods for controlled protein heterogenization. This Review discusses the factors that must be addressed for coupling biocatalysts to electronics interfaces, as well as the toolbox of available methods for achieving this outcome.

    3. Imaging Catalysts at Work: A Hierarchical Approach from the Macro- to the Meso- and Nano-scale (pages 62–80)

      Prof. Dr.  Jan-Dierk Grunwaldt, Dr.  Jakob B. Wagner and Prof. Dr.  Rafal E. Dunin-Borkowski

      Article first published online: 21 NOV 2012 | DOI: 10.1002/cctc.201200356

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      Zoom in on catalysis: Characterization techniques that have traditionally provided “global” atomic scale information about catalysts are being developed to provide the same information on a more local scale, often with sub-second time resolution under close-to-realistic reaction conditions. We compare the complementary techniques that are presently available, including environmental transmission electron microscopy, and discuss their limitations and future prospects.

    4. Selective Catalytic Oxidation of C[BOND]H Bonds with Molecular Oxygen (pages 82–112)

      Prof. Emil Roduner, Prof. Wolfgang Kaim, Prof. Biprajit Sarkar, Prof. Vlada B. Urlacher, Prof. Jürgen Pleiss, Prof. Roger Gläser, Prof. Wolf-Dietrich Einicke, Prof. Georg A. Sprenger, Prof. Uwe Beifuß, Prof. Elias Klemm, Dr. Christian Liebner, Dr. Hartmut Hieronymus, Shih-Fan Hsu, Prof. Bernd Plietker and Prof. Sabine Laschat

      Article first published online: 12 OCT 2012 | DOI: 10.1002/cctc.201200266

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      I don′t always use oxygen, but when I do… The use of molecular oxygen for selective oxidations is discussed and the importance of a dedicated theoretical and spectroscopic toolbox for investigations of catalysis is reinforced. Theory predicts that the two reactants can bind simultaneously to the zeolite supported copper center in the aerobic oxidation of benzene to phenol, see the figure.

  7. Highlight

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Metal-mediated Coupling of Carbon Dioxide and Aryl/Vinyl Chlorides under Ambient Conditions (pages 113–115)

      Prof. Dr. Arjan W. Kleij

      Article first published online: 17 SEP 2012 | DOI: 10.1002/cctc.201200462

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      The mildest touch: The challenge of converting carbon dioxide, a renewable carbon feedstock, into value-added organic products remains highly inspiring for organic chemists. Although extremely challenging, now the carboxylation of aryl and vinyl chlorides has been realized under ambient conditions with a simple and accessible NiII complex. This attractive protocol demonstrates the unique potential of transition metal chemistry in CO2 fixation catalysis.

  8. Communications

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Complete Catalytic Deoxygenation of CO2 into Formamidine Derivatives (pages 117–120)

      Dr. Olivier Jacquet, Christophe Das Neves Gomes, Dr. Michel Ephritikhine and Dr. Thibault Cantat

      Article first published online: 26 NOV 2012 | DOI: 10.1002/cctc.201200732

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      C1, seen them all: A catalytic transformation that uses CO2 as an oxygen-free C1 building block is presented. The reductive functionalization of CO2 is promoted by N-heterocyclic carbenes or guanidines as organocatalysts in the presence of amines and hydrosilanes. This diagonal strategy selectively affords benzimidazoles, quinazolinones, 3,4-dihydroquinazolines, formamidines, and their derivatives, directly from CO2 under mild conditions.

    2. Palladium-Catalyzed, Ligand-Controlled Chemoselective Oxidative Coupling Reactions of Benzene Derivatives with Acrylamides under an Oxygen Atmosphere (pages 121–125)

      Seiichiro Harada, Hiroki Yano and Dr. Yasushi Obora

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cctc.201200649

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      Under an oxygen umbrella: The Pd-catalyzed aerobic oxidative coupling of benzene derivatives with acrylates provides an efficient and atom-economical route to cinnamamides (see scheme). Readily available starting materials are used and molecular oxygen serves as the sole oxidant. By using this system, the chemoselective oxidative coupling reaction can provide either monoarylation or diarylation products simply by changing the molar ratio of Pd/acacH.

    3. PNNP-Ligated RuII Complexes as Efficient Catalysts for Mild Benzylic C[BOND]H Oxidation (pages 126–129)

      Shih-Fan Hsu and Prof. Dr. Bernd Plietker

      Article first published online: 30 NOV 2012 | DOI: 10.1002/cctc.201200590

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      Selective C[BOND]H oxidation: A novel class of PNNP–RuII complexes is prepared and characterized. These complexes are air stable and easy to handle and show significant catalytic activity in the direct C[BOND]H oxidation of aryl alkanes by using tert-butylhydroperoxide as the reoxidant. Several functionalized ketones are prepared, which exemplifies the synthetically useful functional group tolerance of this method.

    4. Hydrogen Evolution by Carbonaceous Nanoparticle Aggregates that were derived from Cobalt Phthalocyanine (pages 130–133)

      Dr. Jun Maruyama, Dr. Tsutomu Ioroi, Dr. Zyun Siroma, Dr. Takahiro Hasegawa and Prof. Dr. Atsushi Mineshige

      Article first published online: 26 NOV 2012 | DOI: 10.1002/cctc.201200550

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      On HER majesty′s secret service: A carbonaceous material that was based on pyrolyzed cobalt phthalocyanine showed catalytic activity for the hydrogen-evolution reaction (HER) in aqueous acidic electrolytes and functioned as a H+-reduction catalyst in a convenient, safe, all-solid-state water electrolyzer by using a perfluorosulfonate ion-exchange polymer membrane.

    5. Efficient Solar Photooxygenation with Supported Porphyrins as Catalysts (pages 134–137)

      Sónia Ribeiro, Dr. Arménio C. Serra and Prof. António M. d' A. Rocha Gonsalves

      Article first published online: 26 NOV 2012 | DOI: 10.1002/cctc.201200532

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      Sunny side up: A very simple and efficient singlet-oxygen-mediated oxidative system that uses solar radiation, molecular oxygen, and Merrifield-supported porphyrins is presented.

    6. Remarkable Improvement of Catalytic Performance for a New Cobalt-Decorated Cu/HMS Catalyst in the Hydrogenation of Dimethyloxalate (pages 138–141)

      Chao Wen, Yuanyuan Cui, Dr. Anyuan Yin, Prof. Kangnian Fan and Prof. Dr. Wei-Lin Dai

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cctc.201200444

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      Evaporate to invigorate: The catalytic activity of the Cu/HMS catalyst is greatly enhanced by decorating with only 1 wt. % of cobalt. The co-ammonia-evaporation method leads to stronger interactions between the copper and cobalt species and more metallic cobalt may facilitate the activation of hydrogen.

    7. Magnetic Fe–Ni Alloy Catalyzed Suzuki Cross-Coupling Reactions of Aryl Halides with Phenylboronic Acid (pages 142–145)

      Dr. Rongzhao Zhang, Dr. Chengxia Miao, Shoufeng Wang, Prof. Dr. Chungu Xia and Prof. Dr. Wei Sun

      Article first published online: 22 NOV 2012 | DOI: 10.1002/cctc.201200417

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      Alloy there matey! The inexpensive and readily prepared magnetic Fe–Ni alloy is employed in the Suzuki reactions of aryl halides with phenylboronic acid. The products are obtained in moderate to excellent yields in the absence of a reducing agent. The magnetic nature of the catalyst is beneficial for the separation of the products, but the recyclability of the catalyst is poor, probably as a result of oxidation and leaching.

    8. Oxidative Coupling of Methane by Nanofiber Catalysts (pages 146–149)

      Daniel Noon, Dr. Anusorn Seubsai and Prof. Dr. Selim Senkan

      Article first published online: 3 DEC 2012 | DOI: 10.1002/cctc.201200408

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      The fabric of life: Fabrics of metal-oxide nanofibers are a new class of high-performance catalytic materials with potential applications in industrial chemistry. By providing excellent dispersion, order, and access to the catalytic sites, La2O3[BOND]CeO2 fabrics exhibited high performance in the oxidative coupling of methane at significantly lower feed-gas temperatures than analogous powder catalysts.

    9. Connecting Unexplored Protein Crystal Structures to Enzymatic Function (pages 150–153)

      Fabian Steffen-Munsberg, Dr. Clare Vickers, Ahmad Thontowi, Dr. Sebastian Schätzle, Tony Tumlirsch, Dr. Maria Svedendahl Humble, Henrik Land, Prof. Dr. Per Berglund, Prof. Dr. Uwe T. Bornscheuer and Prof. Dr. Matthias Höhne

      Article first published online: 8 NOV 2012 | DOI: 10.1002/cctc.201200544

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      Digging in the database: Four synthetically useful transaminases for which no function was known were studied by evaluating a set of eight amino donors and seven acceptors (see figure). The four enzymes differ substantially in their catalytic properties and substrate preferences. We also used the enzymes in the asymmetric synthesis of a range of chiral amines and observed excellent enantioselectivities and conversions.

    10. Revealing the Structural Basis of Promiscuous Amine Transaminase Activity (pages 154–157)

      Fabian Steffen-Munsberg, Dr. Clare Vickers, Ahmad Thontowi, Dr. Sebastian Schätzle, Tina Meinhardt, Dr. Maria Svedendahl Humble, Henrik Land, Prof. Dr. Per Berglund, Prof. Dr. Uwe T. Bornscheuer and Prof. Dr. Matthias Höhne

      Article first published online: 8 NOV 2012 | DOI: 10.1002/cctc.201200545

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      One lock for different keys: A flexible arginine in the active site allows γ-aminobutyrate:pyruvate transaminases to bind the chemically different substrates L-alanine and γ-aminobutyric acid. Moreover, a flexible arginine residue facilitates the promiscuous conversion of (S)-amines and ketones. The degree of promiscuity can be related to distinct key amino acids lying at the surface of the active site.

  9. Full Papers

    1. Top of page
    2. Cover Pictures
    3. Editorials
    4. Graphical Abstract
    5. Corrigendum
    6. News
    7. Reviews
    8. Highlight
    9. Communications
    10. Full Papers
    1. Flow Chemistry Syntheses of Styrenes, Unsymmetrical Stilbenes and Branched Aldehydes (pages 159–172)

      Samuel L. Bourne, Dr. Matthew O'Brien, Sivarajan Kasinathan, Dr. Peter Koos, Dr. Päivi Tolstoy, Dennis X. Hu, Dr. Roderick W. Bates, Dr. Benjamin Martin, Dr. Berthold Schenkel and Prof. Steven V. Ley

      Article first published online: 20 DEC 2012 | DOI: 10.1002/cctc.201200778

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      Through the telescope: Two tandem flow chemistry processes are developed. A palladium-catalyzed Heck reaction with ethylene gas provides an efficient synthesis for functionalized styrenes. By telescoping this reaction with either a second Heck reaction or a hydroformylation reaction in continuous flow mode, unsymmetrical stilbenes and branched aldehydes are accessed directly from the corresponding aryl iodides.

    2. Mechanistic Studies on Chabazite-Type Methanol-to-Olefin Catalysts: Insights from Time-Resolved UV/Vis Microspectroscopy Combined with Theoretical Simulations (pages 173–184)

      Veronique Van Speybroeck, Karen Hemelsoet, Kristof De Wispelaere, Qingyun Qian, Jeroen Van der Mynsbrugge, Bart De Sterck, Bert M. Weckhuysen and Michel Waroquier

      Article first published online: 30 NOV 2012 | DOI: 10.1002/cctc.201200580

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      Let the light shine: The formation of cationic hydrocarbon pool species that absorb at specific wavelengths is followed by using in situ UV/Vis spectroscopy. Experimentally derived activation energies for their formation correlate well with calculated kinetic rate constants for methylation reactions. The studied species are crucial intermediates in active methanol-to-olefin routes. Our results show that the zeolite cage plays a decisive role in their activity.

    3. The Impact of Reaction Pressure on the Catalytic Performance of the Pd[BOND]Sb/TiO2 Catalyst in the Acetoxylation of Toluene into Benzyl Acetate (pages 185–191)

      Dr.  Neetika Madaan, Dr.  Suresh Gatla, Dr.  Venkata Narayana Kalevaru, Dr.  Jörg Radnik, Dr.  Marga-Martina Pohl, Prof.  Bernhard Lücke, Prof.  Angelika Brückner and Dr.  Andreas Martin

      Article first published online: 26 OCT 2012 | DOI: 10.1002/cctc.201200522

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      Under pressure: Variation of the reaction pressure induces a restructuring of the Pd[BOND]Sb particles, which has a significant influence on the catalytic performance of the Pd[BOND]Sb/TiO2 catalyst, in particular in terms of selectivity and induction period for the acetoxylation of toluene into benzyl acetate.

    4. Highly Selective Synthesis of Phenol from Benzene over a Vanadium-Doped Graphitic Carbon Nitride Catalyst (pages 192–200)

      Guodong Ding, Weitao Wang, Prof. Dr. Tao Jiang, Prof. Dr. Buxing Han, Dr. Honglei Fan and Guanying Yang

      Article first published online: 19 NOV 2012 | DOI: 10.1002/cctc.201200502

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      Sharpen your pencils… A vanadium-doped graphitic carbon nitride catalyst (V-g-C3N4) was successfully synthesized by using urea as the precursor through a facile and efficient method. The catalyst showed high activity in the hydroxylation of benzene with a selectivity to phenol of 100 %. The system can be recycled at least 4 times without considerable decrease in the efficiency.

    5. Soluble and Supported Molecular CoIII Catalysts for the Regioselective Ring-Opening of 1,2-Epoxyhexane with Methanol (pages 201–209)

      Dr. Krishnan Venkatasubbaiah, Dr. Yan Feng, Dr. Tina Arrowood, Dr. Peter Nickias and Prof. Christopher W. Jones

      Article first published online: 12 NOV 2012 | DOI: 10.1002/cctc.201200494

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      Cooperative cobalt catalysts: The regioselective ring-opening of 1,2-epoxyhexane with methanol is studied by using different soluble molecular, soluble supported, and insoluble polymeric CoIII catalysts. Non-coordinating, non-nucleophilic counterions are most effective and a cooperativity effect is found in the supported catalysts. Polymeric insoluble catalysts are recyled with only minor deactivation.

    6. The Effect of the Fluorine Substitution on the Enantioselective Oxidation of Sulfides with Chiral Titanium Catalysts: A Combined Computational and Experimental Investigation (pages 210–219)

      Dr. Maria Annunziata M. Capozzi, Dr. Francesco Capitelli, Prof. Andrea Bottoni, Dr. Matteo Calvaresi and Dr. Cosimo Cardellicchio

      Article first published online: 23 NOV 2012 | DOI: 10.1002/cctc.201200456

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      Have your sandwich and fold it, too: A DFT theoretical study is performed on the oxidation of fluorinated aryl benzyl sulfides in the presence of tert-butyl hydroperoxide and a Ti/(S,S)-hydrobenzoin complex. The stereochemical output is determined by the relative energies of two preliminary diastereomeric Ti complexes which, in turn, depend on a particular “folded sandwich-conformation” adopted by the substrate if the phenyl and benzyl rings are fluorinated.

    7. Monometallic Carbonyl-Derived CeO2-Supported Rh and Co Bicomponent Catalysts for CO-Free, High-Yield H2 Generation from Low-Temperature Ethanol Steam Reforming (pages 220–234)

      Dr. Lin Huang, Catherine Choong, Dr. Luwei Chen, Zhan Wang, Dr. Ziyi Zhong, Carlos Campos-Cuerva and Prof. Jianyi Lin

      Article first published online: 6 NOV 2012 | DOI: 10.1002/cctc.201200452

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      There were two in the bed: CO-free and high-yield H2 can be generated from ethanol steam reforming by efficient water–gas shift at 300 °C over CeO2-supported Rh and Co bicomponent catalysts derived from monometallic carbonyls. A bilayered catalyst system of Rh/CeO2-(Rh+Co)/CeO2 improves performance further.

    8. Organic Dye-Photocatalyzed Acylnitroso Ene Reaction (pages 235–240)

      Yew Chin Teo, Yuanhang Pan and Prof. Choon Hong Tan

      Article first published online: 12 OCT 2012 | DOI: 10.1002/cctc.201200435

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      A rose by any other name: Rose bengal, an inexpensive and readily available organic dye, is demonstrated to be a photoredox catalyst for the formation of transient acylnitroso intermediates under visible light irradiation. Reactions of acylnitroso with a range of functionalized alkenes give intermolecular acylnitrosoene products in moderate to good yields. This is an environmentally friendly allylic amination methodology that avoids the use of metal catalysts and stoichiometric amount of oxidants.

    9. Aerobic Oxidation of Thiols Catalyzed by Copper Nanoparticles Supported on Diamond Nanoparticles (pages 241–246)

      Dr. Amarajothi Dhakshinamoorthy, Dr. Sergio Navalon, David Sempere, Dr. Mercedes Alvaro and Prof. Dr. Hermenegildo Garcia

      Article first published online: 9 NOV 2012 | DOI: 10.1002/cctc.201200569

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      Diamonds are forever: Deposition of copper nanoparticles (NPs) on diamond NPs that were annealed under H2 resulted in a catalyst with small particle sizes of 3–4 nm in a narrow distribution and a decrease of surface carboxylic groups. The Cu NPs performed similar to the more expensive Au NP analogues in the aerobic oxidation of thiols and were characterized by means of various spectroscopic techniques.

    10. Core–Shell Composite as the Racemization Catalyst in the Dynamic Kinetic Resolution of Secondary Alcohols (pages 247–254)

      Dr. Jie Wang, Dong-Minh Do, Prof. Dr. Gaik-Khuan Chuah and Prof. Dr. Stephan Jaenicke

      Article first published online: 13 NOV 2012 | DOI: 10.1002/cctc.201200566

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      Small is in: The dynamic kinetic resolution of secondary alcohols through enzyme-catalyzed transesterification is performed in a one-pot system. The key is a core–shell composite of Beta–Silicalite-1, in which the nanoporous shell suppresses external acidity and allows only small molecules to access the acid sites of the core Beta zeolite.

    11. Palladium-Catalysed Direct Polyarylation of Pyrrole Derivatives (pages 255–262)

      Liqin Zhao, Christian Bruneau and Dr. Henri Doucet

      Article first published online: 19 NOV 2012 | DOI: 10.1002/cctc.201200521

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      Direct to the poly: The palladium-catalyzed direct polyarylation of pyrroles with aryl bromides proceeds smoothly with a catalyst loading of 0.5–1 mol % [Pd] as the catalyst and in the presence of KOAc/DMAc. The diarylation at C2 and C5 of 1-methyl- or 1-phenylpyrrole proceeds with a variety of aryl bromides. From 3,5-bis(trifluoromethyl)bromobenzene and 1-methylpyrrole, the tetraarylated pyrrole is obtained in good yield.

    12. Mechanistic Studies on the Catalytic Oxidative Amination of Alkenes by Rhodium(I) Complexes with Hemilabile Phosphines (pages 263–276)

      M. Victoria Jiménez, M. Isabel Bartolomé, Prof. Dr. Jesús J. Pérez-Torrente, Daniel Gómez, Dr.  F. Javier Modrego and Prof. Dr. Luis A. Oro

      Article first published online: 30 OCT 2012 | DOI: 10.1002/cctc.201200510

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      Proton transfer is key: The catalytically active amido species involved in the oxidative amination of styrene with piperidine catalyzed by rhodium(I) complexes with P,O-functionalized phosphine ligands is regenerated by direct proton transfer from a coordinated amine to an alkyl group. The alternative NH oxidative addition pathway leading to a dihydride intermediate is a highly energy-demanding process.

    13. Palladium-Based Nanocatalyst for One-Pot Synthesis of Polysubstituted Quinolines (pages 277–283)

      Benjamin Wei Jie Chen, Dr. Leng Leng Chng, Dr. Jun Yang, Yifeng Wei, Dr. Jinhua Yang and Prof. Jackie Y. Ying

      Article first published online: 27 NOV 2012 | DOI: 10.1002/cctc.201200496

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      Two in one: Ag[BOND]Pd nanoparticles supported on carbon were used to catalyze a one-pot, two-step tandem reaction to produce polysubstituted quinolines with minimum waste generation (see scheme).

    14. Catalytic Performance of Zeolite-Supported Vanadia in the Aerobic Oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran (pages 284–293)

      Dr. Irantzu Sádaba, Dr. Yury Y. Gorbanev, Dr. Søren Kegnæs, Dr. Siva Sankar Reddy Putluru, Prof. Rolf W. Berg and Prof. Anders Riisager

      Article first published online: 9 NOV 2012 | DOI: 10.1002/cctc.201200482

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      Zeolites are beta at aerobics: Aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) is investigated in organic solvents over vanadia supported on zeolites as catalysts. Effects of support, solvent, temperature, and oxidant pressure on the reaction performance are discussed. 1 wt % V2O5/H-beta is a stable and recyclable catalyst for the oxidation of HMF to N,N-dimethylformamide (DMF) in DMF as solvent under atmospheric pressure. MIBK= methyl isobutyl ketone.

    15. Nickel Catalysts Supported Over TiO2, SiO2 and ZrO2 for the Steam Reforming of Glycerol (pages 294–306)

      Dr. Ilenia Rossetti, Dr. Alessandro Gallo, Dr. Vladimiro Dal Santo, Prof. Claudia L. Bianchi, Dr. Valentina Nichele, Prof. Michela Signoretto, Dr. Elisabetta Finocchio, Prof. Gianguido Ramis and Dr. Alessandro Di Michele

      Article first published online: 2 OCT 2012 | DOI: 10.1002/cctc.201200481

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      The steam team: Ni catalysts are developed for the steam reforming of glycerol. Catalyst resistance towards deactivation, a major concern for the practical application of this reaction, is discussed on the basis of acidity (both of the support and, possibly, of the active phase) and metal dispersion. The latter can be tuned in catalyst preparation and depends on the support. Characterization of the spent catalysts supports conclusions on the deactivation phenomena.

    16. Magnetic Polystyrene Nanosphere Immobilized TEMPO: A Readily Prepared, Highly Reactive and Recyclable Polymer Catalyst in the Selective Oxidation of Alcohols (pages 307–312)

      Zhi Zheng, Prof. Jianli Wang, Miao Zhang, Lixin Xu and Prof. Jianbing Ji

      Article first published online: 8 NOV 2012 | DOI: 10.1002/cctc.201200459

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      Step up the TEMPO: The novel 2,2,6,6-tetramethylpiperidine-1-oxyl/magnetic polystyrene nanospheres (TEMPO/MPNs) catalyst has similar activity and versatility to the homogeneous TEMPO analogues, features that are not observed in previous studies on heterogeneous TEMPO-Montanari catalysts.

    17. Elucidation of Nitrate Reduction Mechanisms on a Pd-In Bimetallic Catalyst using Isotope Labeled Nitrogen Species (pages 313–321)

      Rui Zhang, Dr. Danmeng Shuai, Dr. Kathryn A. Guy, Prof. John R. Shapley, Prof. Timothy J. Strathmann and Prof. Charles J. Werth

      Article first published online: 23 NOV 2012 | DOI: 10.1002/cctc.201200457

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      A game of tag: 15N-labeling is shown to be an effective tool for the study of the nitrate/nitrite reduction pathways by eliminating interference from atmospheric 14N2. A new kinetic model is proposed, which indicates that highly reactive adsorbed NO (NO*), or other unspecified adsorbed N species, is a key intermediate involved in determining final product selectivity.

    18. Chemoselective Hydrogenation and Transfer Hydrogenation of Olefins and Carbonyls with the Cluster-Derived Ruthenium Nanocatalyst in Water (pages 322–330)

      Dr. Arindam Indra, Dr. Prasenjit Maity, Prof. Dr. Sumit Bhaduri and Prof. Dr. Goutam Kumar Lahiri

      Article first published online: 19 NOV 2012 | DOI: 10.1002/cctc.201200448

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      Getting in a cluster: Water-soluble poly(diallyldimethylammonium chloride)-supported [H3Ru4(CO)12]-derived catalyst hydrogenates and transfer hydrogenates aromatic substrates in water with chemoselectivity, which is not observed for Ru/Al2O3 and other ruthenium-based catalysts.

    19. Mesoporous Borated Zirconia: A Solid Acid–Base Bifunctional Catalyst (pages 331–338)

      Apurba Sinhamahapatra, Provas Pal, Dr. Abhijit Tarafdar, Dr. Hari C. Bajaj and Dr. Asit Baran Panda

      Article first published online: 6 NOV 2012 | DOI: 10.1002/cctc.201200440

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      The buzz about BZ: Mesoporous borated zirconia (B2O3-ZrO2, BZ) was synthesized using in situ incorporation of borate species into zirconia framework. It shows high acidity with weak basic sites. The catalyst was used for the Knoevenagel condensation reaction and Claisen–Schmidt condensation reaction. Cinnamyl ethyl ester and coumarin or coumarin ester were also synthesized.

    20. Direct Methyl Formate Formation from Methanol over Supported Palladium Nanoparticles at Low Temperature (pages 339–348)

      Roberto Wojcieszak, Prof.  Eric M. Gaigneaux and Patricio Ruiz

      Article first published online: 19 NOV 2012 | DOI: 10.1002/cctc.201200325

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      A real challenge: Very active supported palladium nanoparticles have been used as selective catalysts in the oxidation of methanol to methyl formate in the presence of oxygen, but only at low temperature. At higher temperature, methyl formate is not formed at all and the formation of CO2 is promoted.

    21. Preparation of Recoverable Pd Catalysts for Carbonylative Cross-Coupling and Hydrogenation Reactions (pages 349–354)

      Jian-Rui Niu, Xing Huo, Feng-Wei Zhang, Hai-Bo Wang, Ping Zhao, Wu-Quan Hu, Prof. Jiantai Ma and Prof. Rong Li

      Article first published online: 19 NOV 2012 | DOI: 10.1002/cctc.201200129

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      The name's bond…aryl bond: Supported Pd0 and PdII catalysts have been prepared for the Suzuki carbonylative cross-coupling of aryl iodides with arylboronic acids and the hydrogenation of aromatic nitro- and unsaturated compounds.

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