ChemCatChem

Cover image for Vol. 5 Issue 8

August 2013

Volume 5, Issue 8

Pages 2061–2536

  1. Cover Pictures

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. You have free access to this content
      Cover Picture: An Effective Cellulose-to-Glucose-to-Fructose Conversion Sequence by Using Enzyme Immobilized Fe3O4-Loaded Mesoporous Silica Nanoparticles as Recyclable Biocatalysts (ChemCatChem 8/2013) (page 2061)

      Yi-Chun Lee, Ching-Tien Chen, Yu-Ting Chiu and Prof. Dr. Kevin C.-W. Wu

      Version of Record online: 25 JUL 2013 | DOI: 10.1002/cctc.201390037

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      Don't rush, take it step-by-step! The cover picture shows an effective cellulose-to-glucose-to-fructose conversion sequence in which enzyme-immobilized, Fe3O4-loaded mesoporous silica nanoparticles (MSNs) are used as recyclable biocatalysts. In their Communication on p. 2153 ff., K. C.-W. Wu et al. describe the synthesis of Fe3O4-loaded MSNs as solid catalysts, on which cellulase and isomerase are separately immobilized, for a continuous cellulose-to-glucose followed by glucose-to-fructose conversion sequence in aqueous solution. Such a sequent biological reaction achieves a high fructose yield of up to 50 %, the same as that with free enzyme. The biocatalysts would be effective, green, recyclable, and stable in various enzymatic applications.

    2. You have free access to this content
      Inside Cover: Room Temperature Hydrogen Production from Ethanol over CeNiXHZOY Nano-Oxyhydride Catalysts (ChemCatChem 8/2013) (page 2062)

      Wenhao Fang, Dr. Cyril Pirez, Prof. Dr. Sébastien Paul, Dr. Mickaël Capron, Dr. Hervé Jobic, Prof. Dr. Franck Dumeignil and Dr. Louise Jalowiecki-Duhamel

      Version of Record online: 25 JUL 2013 | DOI: 10.1002/cctc.201390038

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      Taking alcohol from the nanobar The cover picture shows the use of nickel and cerium nano-oxyhydride catalysts in hydrogen production from ethanol in the presence of water and oxygen. In their Full Paper on p. 2207 ff., L. Jalowiecki-Duhamel et al. describe the characterization and catalytic properties of the nano-compounds. Hydrogen production (45 mol %) and total conversion of ethanol remain almost constant over at least 75 h time-on-stream with only a small energy input (reaction in oven at 60 °C), thanks to the presence of hydride species stored in the solid.

    3. You have free access to this content
      Back Cover: Ag/AgBr-Grafted Graphite-like Carbon Nitride with Enhanced Plasmonic Photocatalytic Activity under Visible Light (ChemCatChem 8/2013) (page 2540)

      Dr. Yang-Sen Xu and Prof. Dr. Wei-De Zhang

      Version of Record online: 25 JUL 2013 | DOI: 10.1002/cctc.201390041

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      Hybrid heaven The cover picture shows a new plasmonic photocatalytic mechanism of a visible-light-driven plasmonic photocatalyst Ag/AgBr/g-C3N4 (g=graphite-like), proposed on the basis of surface plasmon resonance (SPR) and charge separation of Ag. In their Full Paper on p. 2343 ff., W.-D. Zhang and Y.-S. Xu describe how their metal–semiconductor ternary composite photocatalyst, compared with bare g-C3N4 or Ag/AgBr nanoparticles, shows respective 28- and 6-fold improvements in the degradation rate toward rhodamine B under visible-light irradiation.

  2. Editorial

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. You have free access to this content
      Catálisis llama a Catálisis—Catalysis Calls to Catalysis (pages 2063–2064)

      Prof. Luis A. Oro

      Version of Record online: 25 JUL 2013 | DOI: 10.1002/cctc.201300516

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      Hot off the press: Developments and promotions at ChemCatChem.

  3. Graphical Abstract

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
  4. News

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
  5. Concept

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. On-Chip Catalytic Microreactors for Modern Catalysis Research (pages 2091–2099)

      Bin-Bin Xu, Dr. Yong-Lai Zhang, Dr. Shu Wei, Hong Ding and Prof. Hong-Bo Sun

      Version of Record online: 15 APR 2013 | DOI: 10.1002/cctc.201200863

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      Great expectations for microreactors: We highlight the importance of on-chip catalytic microreactors for catalysis research. New approaches to the fabrication of on-chip catalytic microreactors and their integration with multifunctional components are introduced. It is believed that on-chip catalytic microreactors could become a highly efficient experimental platform for modern catalysis.

  6. Review

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. Three Carbons for Complexity! Recent Developments of Palladium-Catalyzed Reactions of Allenes (pages 2100–2130)

      Dr. Tilman Lechel, Dr. Fabian Pfrengle, Prof. Dr. Hans-Ulrich Reissig and Dr. Reinhold Zimmer

      Version of Record online: 9 APR 2013 | DOI: 10.1002/cctc.201200875

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      Complexity at its best! This review summarizes the latest advances in the field of allenes for their applications as substrates in palladium-catalyzed reactions. The progress in the field of allene chemistry is amazing and covers a plethora of products ranging from simple acyclic compounds to complex molecule architectures and natural products.

  7. Minireview

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. Isatin as a Strategic Motif for Asymmetric Catalysis (pages 2131–2148)

      Somayeh Mohammadi, Roghayeh Heiran, Dr. Raquel P. Herrera and Dr. Eugenia Marqués-López

      Version of Record online: 24 APR 2013 | DOI: 10.1002/cctc.201300050

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      Strategic move: Isatin as a core structure has inspired the development of useful catalytic strategies to give access to interesting molecular architectures with biological activity.

  8. Highlight

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. Gold-Catalyzed Intermolecular Enantioselective [2+2] Cycloadditions of Sulfonylallenamides and Styrenes (pages 2149–2151)

      Dr. Pablo Mauleón

      Version of Record online: 5 JUN 2013 | DOI: 10.1002/cctc.201300282

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      It′s hip to be square: The search for methods for the enantioselective construction of carbocycles continues to fuel new discoveries. Now, the treatment of mixtures of sulfonylallenamides and styrenes with gold(I)-phosphoramidite complexes results in the formation of cyclobutene carbon frameworks in high yield and optical purity.

  9. Communications

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. An Effective Cellulose-to-Glucose-to-Fructose Conversion Sequence by Using Enzyme Immobilized Fe3O4-Loaded Mesoporous Silica Nanoparticles as Recyclable Biocatalysts (pages 2153–2157)

      Yi-Chun Lee, Ching-Tien Chen, Yu-Ting Chiu and Prof. Dr. Kevin C.-W. Wu

      Version of Record online: 17 JUN 2013 | DOI: 10.1002/cctc.201300219

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      Goodness, gracious, great balls of iron: Fe3O4-encapsulated mesoporous silica nanoparticles (MSNs) are synthesized and utilized as hosts for the separate immobilization of cellulase and isomerase for a continuous cellulose–glucose–fructose conversion sequence with a high yield of 51 % in aqueous solution.

    2. Efficient Iron-Catalyzed Acetal Formation from Styrene Derivatives (pages 2158–2161)

      Ritwika Ray, Dr. Abhishek Dutta Chowdhury and Prof. Goutam Kumar Lahiri

      Version of Record online: 31 MAY 2013 | DOI: 10.1002/cctc.201300270

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      All green in one medium: FeSO47 H2O in combination with pyridine-2-carboxylic acid and H2O2 in methanol can efficiently catalyze the formation of arylaldehyde dimethyl acetals from the corresponding styrene derivatives.

    3. CO Oxidation on Metal-Supported Ultrathin Oxide Films: What Makes Them Active? (pages 2162–2166)

      Yulia Martynova, Dr. Shamil Shaikhutdinov and Prof. Hans-Joachim Freund

      Version of Record online: 31 MAY 2013 | DOI: 10.1002/cctc.201300212

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      It depends on O: The catalytic properties of ultrathin oxide films are studied by using the low-temperature oxidation of CO as a benchmark reaction. The results reveal a strong correlation between the activity and the desorption energy of the most weakly bound oxygen species present on these films under net oxidizing conditions at near-atmospheric pressures. The results suggest the use of oxygen binding energy as a suitable descriptor for the reaction.

    4. A Recyclable “Boomerang” Linear Polystyrene-Stabilized Pd Nanoparticles for the Suzuki Coupling Reaction of Aryl Chlorides in Water (pages 2167–2169)

      Dr. Atsushi Ohtaka, Erina Sakaguchi, Tomohiro Yamaguchi, Dr. Go Hamasaka, Prof. Yasuhiro Uozumi, Dr. Osamu Shimomura and Prof. Ryôki Nomura

      Version of Record online: 16 MAY 2013 | DOI: 10.1002/cctc.201300204

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      Boomerang! It keeps coming back! The reversible transfer of Pd species between water (reaction medium) and polystyrene (polymer support) was confirmed for Suzuki coupling reaction of aryl chloride with arylboronic acid in the presence of tetrabutylammonium bromide. No clear change in particle size was observed by TEM after re-stabilization of the Pd species on linear polystyrene.

    5. The Ru-Catalyzed Alkylative Dearyloxylation of L-type 2-Aryloxyethanols (pages 2170–2173)

      Daniel Weickmann and Prof. Dr. Bernd Plietker

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300177

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      Not everybody can be a lignin supermodel: A commercially available Ru-complex was found to be efficient in the selective dearyloxylation of various lignin-type model compounds under hydrogen-autotransfer conditions. Addition of base and a primary alcohol after the dearyloxylation set the stage for a sequential alkylative dearyloxylation giving various α-alkylated lignin-type degradation products in good yields.

    6. Synthesis of Dimethyl Carbonate through Vapor-Phase Carbonylation Catalyzed by Pd-Doped Zeolites: Interaction of Lewis Acidic Sites and Pd Species (pages 2174–2177)

      Yuanyuan Dong, Shouying Huang, Dr. Shengping Wang, Dr. Yujun Zhao, Prof. Dr. Jinlong Gong and Prof. Dr. Xinbin Ma

      Version of Record online: 11 JUN 2013 | DOI: 10.1002/cctc.201300170

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      All doped up: The interaction between Lewis (L) acidic sites and Pd species in the vapor-phase carbonylation reaction of methyl nitrite over Pd/Faujasite (FAU) catalysts is determined quantitatively. By keeping the Pd species in an electron-deficient state, the Lewis acids of the Pd/FAU catalysts promote the synthesis of dialkyl carbonates.

    7. Tandem Synthesis of N-Alkylated Amides from Aldoximes and Alcohols by Using a Ru/Ir Dual-Catalyst System (pages 2178–2182)

      Dr. Feng Li, Panpan Qu, Juan Ma, Xiaoyuan Zou and Chunlou Sun

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/cctc.201300140

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      In the same boat: Tandem rearrangement/N-alkylation reactions in the presence of a Ru/Ir dual-catalyst system affords the desired N-alkylated amines in good-to-excellent yields with no intermediate amides or over-alkylated N,N-dialkylated amides. This environmentally friendly tandem reaction employs readily available starting materials, affords excellent selectivities for the N-alkylated amides, and shows high atom efficiency.

    8. Reversible Hydrogenation–Oxidative Dehydrogenation of Quinolines over a Highly Active Pt Nanowire Catalyst under Mild Conditions (pages 2183–2186)

      Danhua Ge, Dr. Lei Hu, Jiaqing Wang, Prof. Xingming Li, Fenqiang Qi, Prof. Jianmei Lu, Prof. Xueqin Cao and Prof. Hongwei Gu

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/cctc.201300136

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      Over the wire and back again: The reversible hydrogenation–oxidative dehydrogenation of quinolines is reported by using Pt nanowire (NW) as the catalyst under mild reaction conditions. Pt NW shows high activity and selectivity in the hydrogenation of quinolines under H2 pressure (1 bar=100 kPa), and these hydrogenation products can be easily oxidized under the same conditions in an atmosphere of oxygen (1 bar) or in air.

    9. Highly Enantioselective Synthesis of N-Protected β-Amino Malonates Catalyzed by Magnetically Separable Heterogeneous Rosin-Derived Amino Thiourea Catalysts: A Stereocontrolled Approach to β-Amino Acids (pages 2187–2190)

      Dr. Hao Zhu, Dr. Xianxing Jiang, Dr. Xinghua Li, Chen Hou, Yu Jiang, Ke Hou, Prof. Dr. Rui Wang and Prof. Dr. Yanfeng Li

      Version of Record online: 11 JUN 2013 | DOI: 10.1002/cctc.201300089

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      A rosin by any other name: Magnetic-nanoparticle-supported bifunctional rosin-derived tertiary amino thiourea catalysts are developed for the stereocontrolled synthesis of chiral β-amino acids. Boc=tert-butoxycarbonyl, Bn=benzyl.

    10. Superior Catalytic Performance of Mesoporous Zeolite TS-1 for the Oxidation of Bulky Organic Sulfides (pages 2191–2194)

      Zhenzhen Kang, Guoyong Fang, Qingping Ke, Jianbo Hu and Prof. Dr. Tiandi Tang

      Version of Record online: 2 APR 2013 | DOI: 10.1002/cctc.201300084

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      Rich man, pore man: A facile and universal route to mesoporous zeolite TS-1 (MTS-1) is reported. Compared with mesoporous-free TS-1, the MTS-1 zeolite shows extraordinarily catalytic activity and highly controllable chemoselectivity for the oxidation of sulfides into sulfoxides or sulfones. Based on the catalytic data, the Ti[BOND]hydroperoxo (η2) group is proposed to be the active site for the oxidation of sulfides into sulfoxides and sulfones.

    11. Multiple One-Pot Reaction Steps using Organically Doped Metallic Hybrid Catalyst (pages 2195–2198)

      Leora Shapiro and Prof. David Avnir

      Version of Record online: 24 MAY 2013 | DOI: 10.1002/cctc.201300261

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      Positive reinforcement: The composite catalytic-dopant@catalytic-metal (an organic catalyst entrapped within a catalytic metal) synergistically outperforms the combined activities of each individual catalyst. Specifically, the dual catalytic activity of Nafion@Pd is investigated by combining elimination with either hydrogenation or disproportion in a one-pot, two-catalytic-step process, which proceeds to completion with only the catalytic composite.

    12. Insight into the Mechanism of the Preferential Oxidation of Carbon Monoxide by Using Isotope-Modulated Excitation IR Spectroscopy (pages 2199–2202)

      Dr. Nobutaka Maeda, Fabian Meemken and Prof. Dr. Alfons Baiker

      Version of Record online: 16 MAY 2013 | DOI: 10.1002/cctc.201300172

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      DRIFTing through time: Modulation excitation in situ diffuse-reflectance IR Fourier transform (DRIFT) spectroscopy with periodic isotopic perturbation (D2 and 13CO) has been applied to elucidate the pathway for the preferential oxidation of carbon monoxide (PROX) over a commercial Pt/alumina catalyst. The time- and phase-domain IR spectra suggest a water-assisted pathway for the preferential oxidation reaction.

    13. Direct Synthesis of Phenol from Benzene and O2, Regulated by NH3 on Pt/β and Pt-Re/ZSM-5 Catalysts (pages 2203–2206)

      Dr. Linsheng Wang, Prof. Dr. Sadaaki Yamamoto, Dr. Sachin Malwadkar, Dr. Shin-ichi Nagamatsu, Dr. Takehiko Sasaki, Kenichiro Hayashizaki, Dr. Mizuki Tada and Prof. Dr. Yasuhiro Iwasawa

      Version of Record online: 3 MAY 2013 | DOI: 10.1002/cctc.201300166

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      Best director: The direct synthesis of phenol from benzene and O2 was performed with 78–94 % selectivity on Pt/β and Pt-Re/ZSM-5 catalysts, regulated by NH3 (see figure, (1)). An alternating process (see figure, (2)-1 and (2)-2) afforded the selective synthesis of phenol with 83–99.8 % selectivity, whilst minimizing the consumption of NH3.

  10. Full Papers

    1. Top of page
    2. Cover Pictures
    3. Editorial
    4. Graphical Abstract
    5. News
    6. Concept
    7. Review
    8. Minireview
    9. Highlight
    10. Communications
    11. Full Papers
    1. Room Temperature Hydrogen Production from Ethanol over CeNiXHZOY Nano-Oxyhydride Catalysts (pages 2207–2216)

      Wenhao Fang, Dr. Cyril Pirez, Prof. Dr. Sébastien Paul, Dr. Mickaël Capron, Dr. Hervé Jobic, Prof. Dr. Franck Dumeignil and Dr. Louise Jalowiecki-Duhamel

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300087

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      Taking alcohol from the nanobar: CeNiXHZOY nano-oxyhydride catalysts enable us to completely convert ethanol at 60 °C and produce hydrogen (45 mol % in the gas phase products) through the oxidative steam reforming reaction. The oxyhydrides are obtained through the in situ activation of CeNiXOY nanocompounds in hydrogen at 250 °C. This technology can save energy by using the strong exothermic chemical reaction between the hydride species in the catalyst and O2.

    2. Direct O2 Activation on Gold/Metal Oxide Catalysts through a Unique Double Linear O[BOND]Au[BOND]O Structure (pages 2217–2222)

      Dr. Keju Sun, Dr. Masanori Kohyama, Dr. Shingo Tanaka and Prof. Dr. Seiji Takeda

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300134

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      Two straight molecules: Direct O2 dissociation on gold was analyzed by Hückel theory and a unique double linear O[BOND]Au[BOND]O structure was proposed to activate the O2. DFT calculations reveal that the sites with the double linear O[BOND]Au[BOND]O structure have high reactivity, with O2 dissociation barriers as low as 0.12 eV and 0.17 eV for Au/TiO2 and Au/CeO2 systems, respectively.

    3. Sol–Gel Synthesis and Characterisation of Nanoscopic FeF3-MgF2 Heterogeneous Catalysts with Bi-Acidic Properties (pages 2223–2232)

      Ying Guo, Dr. Piotr Gaczyński, Prof. Dr. Klaus-Dieter Becker and Prof. Dr. Erhard Kemnitz

      Version of Record online: 31 MAY 2013 | DOI: 10.1002/cctc.201300115

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      Bi-acidic fluoride: We use a simple one-step fluorination to synthesise ternary FeF3-MgF2 catalysts with both Lewis and Brønsted acid sites on the surface.

    4. Base-Free β-Boration of α,β-Unsaturated Imines Catalysed by Cu2O with Concurrent Enhancement of Asymmetric Induction (pages 2233–2239)

      Adam D. J. Calow, Cristina Solé, Prof. Andrew Whiting and Dr. Elena Fernández

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300113

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      Pinacolato Cu-cktail, anyone? The activation of reagent bis(pinacolato)diboron (B2pin2) with Cu2O requires no external base to form the CuBpin moiety. Cu2O/ligand guarantees the formation of α,β-unsaturated imines from chalcone-ketone derivatives, aliphatic cyclic, and acyclic ketones and efficiently β-borates the α,β-unsaturated imine formed with high conversions. BINAP=2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, Bn=benzyl group.

    5. Optimizing the Structure of 4-Dialkylamino-α,α-diarylprolinol Ethers as Catalysts for the Enantioselective Cyclopropanation of α,β-Unsaturated Aldehydes in Water (pages 2240–2247)

      Jose I. Martínez, Prof. Efraim Reyes, Dr. Uxue Uria, Prof. Luisa Carrillo and Prof. Jose L. Vicario

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/cctc.201300097

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      Be water my friend: A new family of chiral diarylprolinol-type organocatalysts with improved performances in conjugate addition reactions in water and proceeding under the iminium activation manifold were studied. Once the optimized catalyst structure had been found, it proved its efficiency in the catalytic enantioselective cyclopropanation of α,β-unsaturated aldehydes using water as the only reaction medium.

    6. Dendrimer-Encapsulated Bimetallic Pt-Ni Nanoparticles as Highly Efficient Catalysts for Hydrogen Generation from Chemical Hydrogen Storage Materials (pages 2248–2252)

      Kengo Aranishi, Dr. Ashish Kumar Singh and Prof. Dr. Qiang Xu

      Version of Record online: 3 MAY 2013 | DOI: 10.1002/cctc.201300143

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      I feel it in my dendrimers… Bimetallic Pt-Ni dendrimer-encapsulated nanoparticles (DENs) with different Pt/Ni ratios are synthesized through the co-complexation of Pt2+ and Ni2+ cations to the internal tertiary amine of the dendrimer followed by coreduction by NaBH4. The Pt-Ni DENs show high catalytic activities in hydrous hydrazine decomposition and ammonia borane hydrolysis.

    7. A Ruthenium Catalyst with Simple Triphenylphosphane for the Enantioselective Hydrogenation of Aromatic Ketones (pages 2253–2257)

      Han Zhou and Prof. Dr. Hanmin Huang

      Version of Record online: 8 APR 2013 | DOI: 10.1002/cctc.201300080

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      Keep it simple: An efficient Ru catalyst constructed from simple and commercially available triphenylphosphane and enantiopure (1S,1′S)-1,1′-biisoindoline (BIDN) was applied to the asymmetric hydrogenation of aromatic ketones. A range of simple aromatic ketones could be hydrogenated with good to excellent enantioselectivities (up to 95 % ee).

    8. Catalytic Properties of a Hierarchical Zeolite Synthesized from a Natural Aluminosilicate Mineral without the Use of a Secondary Mesoscale Template (pages 2258–2269)

      Dr. Jiajia Ding, Dr. Haiyan Liu, Dr. Pei Yuan, Gang Shi and Prof. Dr. Xiaojun Bao

      Version of Record online: 20 JUN 2013 | DOI: 10.1002/cctc.201300049

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      Crack me up before you go go! A hierarchical ZSM-5 zeolite that has outstanding performance for the catalytic cracking of 1,3,5-triisopropylbenzene, cumene, and heavy crude oil is successfully synthesized from a natural layered mineral rectorite without using a secondary mesoscale template.

    9. Sonication-Assisted Low-Temperature Routes for the Synthesis of Supported Fe–TiO2 Econanomaterials: Partial Photooxidation of Glucose and Phenol Aqueous Degradation (pages 2270–2277)

      Dr. Juan C. Colmenares, Agnieszka Magdziarz, Dr. Olga Chernyayeva, Dr. Dmytro Lisovytskiy, Prof. Krzysztof Kurzydłowski and Dr. Justyna Grzonka

      Version of Record online: 3 JUN 2013 | DOI: 10.1002/cctc.201300025

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      First sound, then light: Fe-modified TiO2 photocatalysts were synthesized by using a simple wet impregnation method coupled with ultrasonic irradiation. They possess excellent selectivities in glucose oxidation and total phenol mineralization. The most selective system was the zeolite-supported photocatalyst (Fe–TiO2/ZeUI), which after 20 min of illumination achieved a selectivity of 94.3 % for a solvent composition of 50 % H2O/50 % acetonitrile.

    10. Encapsulation of an Olefin Metathesis Catalyst in the Nanocages of SBA-1: Facile Preparation, High Encapsulation Efficiency, and High Activity (pages 2278–2287)

      Prof. Hengquan Yang, Zhancheng Ma, Ting Zhou, Wenjuan Zhang, Prof. Jianbin Chao and Dr. Yong Qin

      Version of Record online: 9 APR 2013 | DOI: 10.1002/cctc.201300021

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      Reaction in a cage: A 2nd generation Hoveyda–Grubbs catalyst was effectively encapsulated in the nanocages of a mesoporous material SBA-1 through a simple post-reduction of the pore size. This solid catalyst showed an activity comparable to its homogeneous counterpart in olefin metathesis reaction and more sensitive temperature effects than the homogeneous counterpart. This catalyst can be recycled seven times without significant Ru leaching.

    11. Probing Substrate Promiscuity of Amylosucrase from Neisseria polysaccharea (pages 2288–2295)

      David Daudé, Dr. Elise Champion, Dr. Sandrine Morel, Dr. David Guieysse, Prof. Magali Remaud-Siméon and Dr. Isabelle André

      Version of Record online: 24 MAY 2013 | DOI: 10.1002/cctc.201300012

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      One enzyme, many substrates: We investigate substrate promiscuity of amylosucrase from Neisseria polysaccharea and its ability to synthesize a variety of glycosylated derivatives. A library of molecules is evaluated as potential donors and acceptors. This screen reveals original carbohydrate structures and underlines the utilization of substrate promiscuities for enhancing glycodiversity.

    12. CNT-Supported MoxC Catalysts: Effect of Loading and Carburization Parameters (pages 2296–2305)

      Dr. Benjamin Frank, Klaus Friedel, Dr. Frank Girgsdies, Xing Huang, Prof. Dr. Robert Schlögl and Dr. Annette Trunschke

      Version of Record online: 15 APR 2013 | DOI: 10.1002/cctc.201300010

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      Reducing to the essential: The synthesis of carbon nanotube-supported α-MoC and β-Mo2C nanoparticles can be controlled by the carburization conditions used. The effects of molybdenum loading, heating rate of carburization, and carburization atmosphere on the catalytic performance of resulting molybdenum carbide catalysts in the steam reforming of methanol are discussed.

    13. Enhancement of Catalytic Activities of Octahedral Molecular Sieve Manganese Oxide for Total and Preferential CO Oxidation through Vanadium Ion Framework Substitution (pages 2306–2317)

      Homer C. Genuino, Yongtao Meng, Dayton T. Horvath, Chung-Hao Kuo, Mohammad S. Seraji, Prof. Aimee M. Morey, Prof. Raymond L. Joesten and Prof. Steven L. Suib

      Version of Record online: 11 APR 2013 | DOI: 10.1002/cctc.201300005

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      Doping for better performance: Vanadium ions substituted into the framework of octahedral molecular sieve manganese oxide nanomaterials through a simple reflux method significantly improved the catalytic activity for total and preferential carbon monoxide oxidation.

    14. Towards Physical Descriptors of Active and Selective Catalysts for the Oxidation of n-Butane to Maleic Anhydride (pages 2318–2329)

      Dr. Maik Eichelbaum, Prof. Robert Glaum, Dr. Michael Hävecker, Knut Wittich, Christian Heine, Heiner Schwarz, Cornelia-Katharina Dobner, Dr. Cathrin Welker-Nieuwoudt, Dr. Annette Trunschke and Prof. Robert Schlögl

      Version of Record online: 14 MAY 2013 | DOI: 10.1002/cctc.201200953

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      Charge transport matters: The gas-phase response of the electrical conductivity, measured contact-free with the in situ microwave cavity perturbation technique, is studied for vanadium(III), (IV), and (V) phosphorus oxide catalysts under selective n-butane oxidation conditions. The deduced surface–bulk charge transport properties of the samples provide a fingerprint for the activity and selectivity in the demanding selective oxidation that requires a 14 e transfer per catalytic cycle.

    15. Mechanistic Investigations of a Stable, Highly Active, Extremely Sterically Shielded Molecular Gold Catalyst (pages 2330–2335)

      Simone G. Weber, David Zahner, Dr. Frank Rominger and Prof. Dr. Bernd F. Straub

      Version of Record online: 25 MAR 2013 | DOI: 10.1002/cctc.201200944

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      Deeply buried but very vivid: An unprecedented combination of high activity, stability, selectivity, and Lewis acidity as well as mechanistic insight is provided by the gold bistriflimide complex of an IPr** N-heterocyclic carbene ancillary ligand with its record buried volume.

    16. Synthesis of Chiral Ligands with Multiple Stereogenic Centers and Their Application in Titanium(IV)-Catalyzed Enantioselective Desymmetrization of meso-Epoxides (pages 2336–2342)

      Manish Kumar, Dr. Rukhsana I. Kureshy, Debashis Ghosh, Dr. Noor-ul H. Khan, Dr. Sayed H. R. Abdi and Dr. Hari C. Bajaj

      Version of Record online: 18 APR 2013 | DOI: 10.1002/cctc.201200912

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      Chiral ligands with diverse stereogenic centers from diastereomeric combinations of aminoalcohol functionalities with (R)- and (S)-1,1-binaphthol are prepared. In asymmetric ring-opening reactions, catalytically active Ti complexes are generated in situ in the presence of water. syn-beta-Amino alcohols of meso-stilbene oxide with (1S,2S) and (1R,2R) configuration are produced in excellent yields (>98 %) and enantioselectivities (ee>99 %) at room temperature.

    17. Ag/AgBr-Grafted Graphite-like Carbon Nitride with Enhanced Plasmonic Photocatalytic Activity under Visible Light (pages 2343–2351)

      Dr. Yang-Sen Xu and Prof. Dr. Wei-De Zhang

      Version of Record online: 17 MAY 2013 | DOI: 10.1002/cctc.201300144

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      Composite success: Ag/AgBr-grafted graphite-like carbon nitride (g-C3N4) is fabricated by the in situ photoreduction of AgBr/g-C3N4 hybrids prepared by a deposition–precipitation method. Compared with bare g-C3N4 and Ag/AgBr nanoparticles, respective 28-fold and 6-fold enhancements in the degradation rate toward rhodamine B are observed over Ag/AgBr/g-C3N4 hybrids under visible-light irradiation.

    18. Gd2Ti2O7/In2O3: Efficient Visible-Light-Driven Heterojunction-Based Composite Photocatalysts for Hydrogen Production (pages 2352–2359)

      Amtul Nashim , Satyabadi Martha and Dr. K. M. Parida 

      Version of Record online: 16 APR 2013 | DOI: 10.1002/cctc.201300037

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      Let there be hydrogen: The collection of photogenerated charge carriers on different photocatalytic surfaces enhances the activity of heterojunction-based Gd2Ti2O7/In2O3 composites for hydrogen production.

    19. Easily-Controlled Chemoselective Hydrogenation by using Palladium on Boron Nitride (pages 2360–2366)

      Dr. Yuki Yabe, Dr. Yoshinari Sawama, Tsuyoshi Yamada, Saori Nagata, Dr. Yasunari Monguchi and Prof. Dr. Hironao Sajiki

      Version of Record online: 11 JUN 2013 | DOI: 10.1002/cctc.201300035

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      Be unique, be selective: The chemoselective hydrogenation of azides, alkenes, and alkynes was achieved without the reduction of other reducible functionalities by the use of a heterogeneous palladium on boron nitride (Pd/BN) catalyst. Furthermore, Pd/BN was applicable to the unique and chemoselective semihydrogenation of alkynes without the reduction of azido functionalities in the presence of pyridine or diethylenetriamine.

    20. Mechanistic Study of Ethanol Dehydrogenation over Silica-Supported Silver (pages 2367–2373)

      Vitaly L. Sushkevich, Prof. Irina I. Ivanova and Dr. Esben Taarning

      Version of Record online: 13 MAY 2013 | DOI: 10.1002/cctc.201300033

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      Every mechanism should have a silver lining: Ethanol is selectively converted into acetaldehyde over Ag supported on silica. The Ag particles and SiOH groups of silica act in a complementary manner in a concerted mechanism, which is proposed based on in situ FTIR spectroscopic studies and kinetic experiments with specifically deuterated ethanol. The proposed mechanism shows the way for the design of efficient supported Ag catalysts.

    21. Ligand-Free Copper-Catalyzed Coupling of Phenols with Nitroarenes by using a Metal–Organic Framework as a Robust and Recoverable Catalyst (pages 2374–2381)

      Dr. Nam T. S. Phan, Tung T. Nguyen, Vu T. Nguyen and Khoa D. Nguyen

      Version of Record online: 22 APR 2013 | DOI: 10.1002/cctc.201300032

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      Catalytic MOF: A highly porous metal–organic framework Cu2(BDC)2(DABCO) (H2BDC=1,4-benzenedicarboxylic acid, DABCO=1,4-diazabicyclo[2.2.2]octane) was synthesized and used as an efficient recyclable heterogeneous catalyst for the coupling reaction of phenols with nitroarenes to form diaryl ethers without using a ligand.

    22. Painting Anatase (TiO2) Nanocrystals on Long Nanofibers to Prepare Photocatalysts with Large Active Surface for Dye Degradation and Organic Synthesis (pages 2382–2388)

      Dr. Zhanfeng Zheng, Jian Zhao, Dr. Hongwei Liu, Dr. Jiangwen Liu, Arixin Bo and Prof. Huaiyong Zhu

      Version of Record online: 13 MAR 2013 | DOI: 10.1002/cctc.201200923

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      A porous paint: Anatase nanocrystals with large surface areas that were painted on the surface of titanate nanofibers bonded solidly. This process generated a superior active surface for photocatalytic reactions, either serving as the photocatalyst or Au catalyst support.

    23. Iridium(III)-Catalyzed Approach for the Synthesis of Fused Arenes: Access to Isoindolines, Indanes, and Dihydroisobenzofurans (pages 2389–2394)

      Dr. Anne-Laure Auvinet, Dr. Mehdi Ez-Zoubir, Savinien Bompard, Dr. Maxime R. Vitale, Jack A. Brown, Dr. Véronique Michelet and Dr. Virginie Ratovelomanana-Vidal

      Version of Record online: 6 JUN 2013 | DOI: 10.1002/cctc.201300068

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      Triple-edged sword: Isoindoline, indane, and dihydroisobenzofuran derivatives are synthesized by using a triply halogen-bridged iridium(III) complex in the [2+2+2] cycloaddition of α,ω-diynes with alkynes. A broad range of substitution groups such as alcohol, alkyl, ether, and halogen can be used and the chemistry extended to prepare the corresponding borylated fused arenes.

    24. Enantioselective Merger of Aminocatalysis with π-Lewis Acid Metal Catalysis: Asymmetric Preparation of Carbo- and Heterocycles (pages 2395–2404)

      Dr. Chandrasekaran Praveen, Dr. Benjamin Montaignac, Dr. Maxime R. Vitale, Dr. Virginie Ratovelomanana-Vidal and Dr. Véronique Michelet

      Version of Record online: 5 JUL 2013 | DOI: 10.1002/cctc.201300313

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      An easy merger: The enantioselective metallo-organocatalyzed synthesis of various five-membered carbo- and heterocyclic structures through the merger of aminocatalysis with the catalytic indium(III) or copper(I) activation of α-disubstituted formyl alkynes is described.

    25. You have full text access to this OnlineOpen article
      Asymmetric Addition of Cyanide to β-Nitroalkenes Catalysed by Chiral Salen Complexes of Titanium(IV) and Vanadium(V) (pages 2405–2409)

      Prof. Michael North and Dr. James M. Watson

      Version of Record online: 28 MAY 2013 | DOI: 10.1002/cctc.201300215

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      Salen but not goodbye: The structurally well-defined Ti and V complexes [Ti(salen)O]2 and VO(salen)NCS are highly effective catalysts for the asymmetric addition of trimethylsilyl cyanide to aliphatic nitroalkenes to give nitronitriles with 79–89 % enantiomeric excess and in 77–93 % isolated yield. Only 2–3 mol % of catalyst is required. Catalysts derived from (R,R)-salen add cyanide to the si face of the nitroalkene.

    26. Expanded Scope of the Asymmetric Hydrogenation of Minimally Functionalized Olefins Catalyzed by Iridium Complexes with Phosphite–Thiazoline Ligands (pages 2410–2417)

      Dr. Javier Mazuela, Dr. Oscar Pàmies and Prof. Montserrat Diéguez

      Version of Record online: 27 MAY 2013 | DOI: 10.1002/cctc.201300189

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      We Ir familee! The replacement of the oxazoline moiety by a thiazoline group in one of the key phosphite–oxazoline ligand families for Ir-catalyzed hydrogenation of minimally functionalized olefins is crucial to expand the range of substrates that can be hydrogenated with excellent enantioselectivities.

    27. Palladium-Containing Ionic Liquid-Based Ordered Mesoporous Organosilica: An Efficient and Reusable Catalyst for the Heck Reaction (pages 2418–2424)

      Dr. Dawood Elhamifar, Prof. Dr. Babak Karimi, Javad Rastegar and Mohammad Hossain Banakar

      Version of Record online: 31 MAY 2013 | DOI: 10.1002/cctc.201300187

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      A Heck of a nanocatalyst! The catalytic application of a novel palladium-containing ionic liquid-based periodic mesoporous organosilica (Pd@PMO-IL-I) in the Heck coupling of different aryl halides with alkyl acrylates has been described. This nanocatalyst demonstrated extremely high reactivity in the Heck reaction of aryl iodides, aryl bromides and aryl chlorides with electron-withdrawing groups. The catalyst could be recovered and reused several times with no decrease in activity.

    28. Structural and Catalytic Properties of Alkaline Post-Treated Ru/ZrO2 Catalysts for Partial Hydrogenation of Benzene to Cyclohexene (pages 2425–2435)

      Gongbing Zhou, Xiaohe Tan, Dr. Yan Pei, Prof. Kangnian Fan, Prof. Dr. Minghua Qiao, Prof. Dr. Bin Sun and Prof. Dr. Baoning Zong

      Version of Record online: 11 JUN 2013 | DOI: 10.1002/cctc.201300175

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      Quantitative relationship: An excellent linearity between the selectivity to cyclohexene and the hydrophilicity of the alkaline post-treated Ru/ZrO2 catalysts was identified in the partial hydrogenation of benzene to cyclohexene, which is instructive for the design of highly selective catalyst for this important but challenging reaction.

    29. Kinetic Studies on sec-Alcohol Racemization with Dicarbonylchloro(pentabenzylcyclopentadienyl)- and Dicarbonylchloro(pentaphenylcyclopentadienyl)ruthenium Catalysts (pages 2436–2445)

      Denys Mavrynsky, Prof. Dr. Dmitry Yu. Murzin and Prof. Dr. Reko Leino

      Version of Record online: 24 MAY 2013 | DOI: 10.1002/cctc.201300163

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      Finding the right k: Detailed kinetic studies on sec-alcohol racemization over high-performance homogeneous cyclopentadienylruthenium catalysts have been performed providing for the first time the calculated racemization rate constants for these systems, relevant for chemo–enzymatic dynamic kinetic resolution of alcohols.

    30. Following the Evolution of Ru/Activated Carbon Catalysts during the Decomposition–Reduction of the Ru(NO)(NO3)3 Precursor (pages 2446–2452)

      Dr. Francisco R. García-García, Prof. Marcos Fernández-García, Dr. Mark A. Newton, Prof. Inmaculada Rodríguez-Ramos and Prof. Antonio Guerrero-Ruiz

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300065

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      Surface effects on the oxidation state of Ru nanoparticles: Depending on the surface structures exhibited in modified activated carbon, the chemistry and final oxidation state of Ru nanoparticles is modified. This is a new type of metal precursor–carbon surface interaction.

    31. Palladium–Poly(3-aminoquinoline) Hollow-Sphere Composite: Application in Sonogashira Coupling Reactions (pages 2453–2461)

      Dr. Rafique Ul Islam, Dr. Sanjit K. Mahato, Sudheesh K. Shukla, Prof. Michael J. Witcomb and Dr. Kaushik Mallick

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300131

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      Heart-to-heart cross-coupling: We report on the use of palladium acetate for the synthesis of a palladium-based polymer composite material as a catalyst for Sonogashira cross-coupling reactions for aryl and heteroaryl of iodides and bromides. This composite catalyst is found to be stable and produces a high turnover frequency value under copper-free and ligand-free conditions.

    32. Clean Synthesis of Amides over Bifunctional Catalysts of Rhodium-Loaded Titanosilicates (pages 2462–2470)

      Le Xu, Ningning Li, Hong-gen Peng and Prof. Peng Wu

      Version of Record online: 3 JUN 2013 | DOI: 10.1002/cctc.201300126

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      Tandem road: Rhodium-loaded titanosilicates are prepared and employed as efficient bifunctional catalysts in the one-pot synthesis of benzamide from benzaldehyde, hydrogen peroxide, and ammonia, which takes place through a tandem reaction including ammoximation of benzaldehyde to benzaldehyde oxime and a sequential dehydration–rehydration reaction to benzamide.

    33. “Imprinting” Catalytically Active Pd Nanoparticles onto Ionic-Liquid-Modified Al2O3 Supports (pages 2471–2478)

      Leandro Luza, Dr. Aitor Gual, Dario Eberhardt, Prof. Dr. Sérgio R. Teixeira, Dr. Sandra S. X. Chiaro and Prof. Dr. Jairton Dupont

      Version of Record online: 18 APR 2013 | DOI: 10.1002/cctc.201300123

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      Going against tradition: Uniformly distributed Pd nanoparticles on imidazolium-ionic-liquid-modified Al2O3 surfaces are prepared by a top down approach by using a new sputtering chamber. The hydrogenation of 1,3-cyclohexadiene is used to probe the surface properties of these new Pd nanoparticles.

    34. Explicit Roles of Au and TiO2 in a Bifunctional Au/TiO2 Catalyst for the Water-Gas Shift Reaction: A DFT Study (pages 2479–2488)

      Dr. Akhtar Hussain, Dr. Jose Gracia, Dr. Ben E. Nieuwenhuys and Prof. Dr. J. W. (Hans) Niemantsverdriet

      Version of Record online: 24 MAY 2013 | DOI: 10.1002/cctc.201300105

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      Acting shifty with DFT: The water–gas shift reaction is studied by using DFT applied to Au(1 0 0), stepped Au(3 1 0), and TiO2 anatase (0 0 1) surfaces. Neither Au nor TiO2 catalyze the reaction by themselves. Two mechanisms are investigated and compared for CO oxidation on Au in the water–gas shift reaction, both featuring H2O dissociation on the TiO2 surface and diffusion of OH and H to Au surfaces, which is the rate-limiting step.

    35. Bioinspired Manganese and Iron Complexes with Tetradentate N Ligands for the Asymmetric Epoxidation of Olefins (pages 2489–2494)

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

      Version of Record online: 21 MAY 2013 | DOI: 10.1002/cctc.201300102

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      Asymmetric barrier overtaken! The manganese and iron complexes with the tetradentate N ligand (1R,2R)-N,N'-dimethyl-N,N'-bis(1-methyl-2-benzimidazolylmethyl)cyclohexane-1,2-diamine have been synthesized and characterized. These complexes are active catalysts for the asymmetric epoxidation of olefins, which resulted in up to 96 % ee.

    36. High Performance and Stability of the Pt-W/ZSM-5 Catalyst for the Total Oxidation of Propane: The Role of Tungsten (pages 2495–2503)

      Zengzan Zhu, Prof. Guanzhong Lu, Prof. Yun Guo, Prof. Yanglong Guo, Zhigang Zhang, Prof. Yanqin Wang and Prof. Xue-Qing Gong

      Version of Record online: 28 MAY 2013 | DOI: 10.1002/cctc.201300101

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      Better with tungsten: The 5 wt. % tungsten-modified Pt/ZSM-5 catalyst has better catalytic activity and stability than the Pt/ZSM-5 catalyst in the total oxidation of propane.

    37. Synthesis of 2,5-Diarylpyrroles by Ligand-Free Palladium-Catalyzed CH Activation of Pyrroles in Ionic Liquids (pages 2504–2511)

      Peter Ehlers, Andranik Petrosyan, Jens Baumgard, Stefan Jopp, Dr. Norbert Steinfeld, Prof. Dr. Tariel V. Ghochikyan, Prof. Dr. Ashot S. Saghyan, Dr. Christine Fischer and Prof. Dr. Peter Langer

      Version of Record online: 24 APR 2013 | DOI: 10.1002/cctc.201300099

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      No ligand, no problem: Diarylpyrroles are synthesized through palladium-catalyzed CH activation and arylation in tetrabutylammonium acetate as an ionic solvent, allowing for a ligand-free catalysis with simple palladium salts or polyvinylpyrrolidone-stabilized palladium nanoparticles.

    38. Multistep Oxidase–Lyase Reactions: Synthesis of Optically Active 2-Hydroxyketones by Using Biobased Aliphatic Alcohols (pages 2512–2516)

      Dr. María Pérez-Sánchez, Christoph R. Müller and Dr. Pablo Domínguez de María

      Version of Record online: 24 MAY 2013 | DOI: 10.1002/cctc.201300093

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      From natural sources: The utilization of (biobased) aliphatic alcohols for the in situ enzymatic production of aldehydes and the subsequent lyase-catalyzed carboligation is explored for the production of α-hydroxyketones, which are valuable building blocks in organic synthesis. The reactions proceed with high conversion and enantioselectivity and are performed in an integrative manner. BAL=benzaldehyde lyase, FAD=flavin adenine dinucleotide.

    39. Water-Soluble, 1,3,5-Triaza-7-phosphaadamantane-Stabilized Palladium Nanoparticles and their Application in Biphasic Catalytic Hydrogenations at Room Temperature (pages 2517–2526)

      Dr. Maria Caporali, Dr. Antonella Guerriero, Dr. Andrea Ienco, Dr. Stefano Caporali, Dr. Maurizio Peruzzini and Dr. Luca Gonsalvi

      Version of Record online: 14 JUN 2013 | DOI: 10.1002/cctc.201300079

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      The cat in the cap: Water-soluble Pd nanoparticles with mean diameters in the range 2.8–3.5 nm are obtained by using 1,3,5-triaza-7-phosphaadamantane and its N-methyl derivative as capping agents. These nanoparticles are used in catalytic C[DOUBLE BOND]C and C[TRIPLE BOND]C bond hydrogenations under mild conditions and show moderate to good conversions and recyclability for up to nine consecutive runs for selected examples. Scale bar=100 nm.

    40. Activity, Recyclability, and Stability of Lipases Immobilized on Oil-Filled Spherical Silica Nanoparticles with Different Silica Shell Structures (pages 2527–2536)

      Dr. Yasutaka Kuwahara, Takato Yamanishi, Dr. Takashi Kamegawa, Dr. Kohsuke Mori and Prof. Dr. Hiromi Yamashita

      Version of Record online: 29 APR 2013 | DOI: 10.1002/cctc.201300072

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      Trapped oil: Candida antarctica lipase A is immobilized on oil-filled spherical silica nanoparticles with different silica shell structures through an anionic surfactant-induced self-assembly approach (see scheme) with ethanol as a cosolvent. The entrapped enzymes mostly retain their activities and exhibit recyclability and thermal and chemical stability, depending on the thickness and pore characteristics of the silica shells. TEOS=Tetraethoxyorthosilicate, APTES=3-aminopropyl triethoxysilane.

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