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Articles from Wiley

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The latest chemistry from ChemPubSoc Europe and Wiley-VCH
Aggiornato: 7 settimane 5 giorni fa

Synthesis and Characterization of Three-Dimensional Porous Cu@Pt and Cu@Pt-Ru Catalysts for Methanol Oxidation

23 gennaio, 2017 - 00:00

Synthesis and Characterization of Three‐Dimensional Porous Cu@Pt and Cu@Pt‐Ru Catalysts for Methanol Oxidation

Now in 3D! Highly porous Cu foams were used as templates for the fabrication of pseudo core–shell Cu@Pt and Cu@Pt-Ru unsupported electrodes by galvanic replacement. The as-prepared 3D electrodes were evaluated for methanol oxidation in acid media at different temperatures. The trimetallic electrode exhibits higher activities compared to the bimetallic one and better poisoning tolerance.

[Full Paper]
Andrea E. Alvarez, Juan Manuel Sieben, Marta M. E. Duarte
ChemCatChem, January 23, 2017, DOI: 10.1002/cctc.201601556. Read article

Support Effects on CO Oxidation on Metal-supported Ultrathin FeO(1 1 1) Films

23 gennaio, 2017 - 00:00

Support Effects on CO Oxidation on Metal‐supported Ultrathin FeO(1 1 1) Films

The weakly bound is the key: The reactivity of well-ordered FeO(1 1 1) films on Au(1 1 1) in low temperature CO oxidation was found to correlate with the amount of so-called “weakly bound oxygen” formed under oxygen-rich conditions, both showing a volcano type dependence on the film coverage. Comparison with Pt(1 1 1) supported films revealed the complex role of a metal support on reactivity.

[Full Paper]
Xuefei Weng, Ke Zhang, Qiushi Pan, Yulia Martynova, Shamil Shaikhutdinov, Hans-Joachim Freund
ChemCatChem, January 23, 2017, DOI: 10.1002/cctc.201601447. Read article

Synthesis of Chiral Polyamides Containing an (<i>R</i>,<i>R</i>)-1,2-Diphenylethylenediamine Monosulfonamide Structure and Their Application to Asymmetric Transfer Hydrogenation Catalysis

23 gennaio, 2017 - 00:00

Synthesis of Chiral Polyamides Containing an (R,R)‐1,2‐Diphenylethylenediamine Monosulfonamide Structure and Their Application to Asymmetric Transfer Hydrogenation Catalysis

It DPENs on the ligand: Asymmetric transfer hydrogenation of a cyclic sulfonamide is efficiently catalyzed by a chiral (R,R)-1,2-diphenylethylenediamine monotoluenesulfonamide (TsDPEN) polymer–metal complex to give an optically active cyclic sulfonylamine with quantitative conversion and high enantioselectivity. The polymer catalyst can be easily recovered and reused several times without any loss in catalytic activity or enantioselectivity.

[Communication]
Shinichi Itsuno, Shotaro Takahashi
ChemCatChem, January 23, 2017, DOI: 10.1002/cctc.201601220. Read article

Superior Catalytic Performance of Hierarchically Micro-Meso-Macroporous CuAlPO-5 for the Oxidation of Aromatic Amines under Mild Conditions

23 gennaio, 2017 - 00:00

Superior Catalytic Performance of Hierarchically Micro‐Meso‐Macroporous CuAlPO‐5 for the Oxidation of Aromatic Amines under Mild Conditions

A bit of yin, a bit of yang: Hierarchically micro-meso-macroporous CuAlPO-5 exhibits higher selectivity for oxidation products than homogeneous Cu catalysts owing to its shape selectivity and higher catalytic activity than the traditional microporous CuAlPO-5 catalyst because of improved diffusion of bulky molecules in the catalyst.

[Communication]
Qingping Ke, Mingzhou Wu, Huizhen Yu, Guanzhong Lu
ChemCatChem, January 23, 2017, DOI: 10.1002/cctc.201601157. Read article

Selective Hydrogenation of Nitriles to Primary Amines Catalyzed by a Polysilane/SiO<sub>2</sub>-Supported Palladium Catalyst under Continuous-Flow Conditions

23 gennaio, 2017 - 00:00

Selective Hydrogenation of Nitriles to Primary Amines Catalyzed by a Polysilane/SiO2‐Supported Palladium Catalyst under Continuous‐Flow Conditions

Primary aim: Continuous flow hydrogenation of nitriles to primary amines over heterogeneous Pd catalyst is described. A newly developed DMPSi-Pd/SiO2 catalyst demonstrates high activity and selectivity, broad substrate scope, and long lifetime without any Pd leaching.

[Communication]
Yuki Saito, Haruro Ishitani, Masaharu Ueno, Sh&#x16B; Kobayashi
ChemistryOpen, January 23, 2017, DOI: 10.1002/open.201600166. Read article

Synthesis of <i>C</i><sub>2</sub>-Symmetric Diphosphormonoamidites and Their Use as Ligands in Rh-Catalyzed Hydroformylation: Relationships between Activity and Hydrolysis Stability

23 gennaio, 2017 - 00:00

 Relationships between Activity and Hydrolysis Stability

Stability versus reactivity: Diphosphoramidites that are highly resistant towards hydrolysis and also perform highly efficiently as monodentate ligands in rhodium-catalyzed hydroformylation of n-octene mixtures have been prepared.

[Full Paper]
Galina Morales Torres, Stephan Behrens, Dirk Michalik, Detlef Selent, Anke Spannenberg, Susan Lühr, Katrin Marie Dyballa, Robert Franke, Armin Börner
ChemistryOpen, January 23, 2017, DOI: 10.1002/open.201600152. Read article

Switching of Regioselectivity in a Perfluorohexyl Iodide Mediated Synthesis of Phenylimidazo[1,2-<i>a</i>]pyridines

23 gennaio, 2017 - 00:00

Switching of Regioselectivity in a Perfluorohexyl Iodide Mediated Synthesis of Phenylimidazo[1,2‐a]pyridines

A protocol for the synthesis of 3-phenylimidazo[1,2-a]pyridines through the perfluorohexyl iodide mediated coupling of 2-aminopyridines and phenylacetylenes is reported; the reaction proceeds through in situ iodination of the terminal alkyne. The iodination reverses the polarity by generating a transient electrophilic iodoalkyne, which alters the regioselectivity of the phenyl group.

[Communication]
Irwan Iskandar Roslan, Gaik-Khuan Chuah, Stephan Jaenicke
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601586. Read article

Nickel(II)-Catalyzed Enantioselective 1,3-Dipolar Cycloaddition of Nitrones with α,β-Unsaturated Acylcarboxylates

23 gennaio, 2017 - 00:00

Nickel(II)‐Catalyzed Enantioselective 1,3‐Dipolar Cycloaddition of Nitrones with &#x3B1;,&#x3B2;‐Unsaturated Acylcarboxylates

[Communication]
Lei Xie, Xuan Yu, Jiaqi Li, Zhenhua Zhang, Zhaohai Qin, Bin Fu
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601540. Read article

An Enantio- and Diastereoselective Mannich/Pictet–Spengler Sequence To Form Spiro[piperidine-pyridoindoles] and Application to Library Synthesis

23 gennaio, 2017 - 00:00

An Enantio‐ and Diastereoselective Mannich/Pictet–Spengler Sequence To Form Spiro[piperidine‐pyridoindoles] and Application to Library Synthesis

[Full Paper]
Alejandra Riesco-Domínguez, Nick van der Zwaluw, Daniel Blanco-Ania, Floris P. J. T. Rutjes
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601508. Read article

Highly Regioselective Monoacylation of Unprotected Glucopyranoside Using Transient Directing-Protecting Groups

23 gennaio, 2017 - 00:00

Highly Regioselective Monoacylation of Unprotected Glucopyranoside Using Transient Directing‐Protecting Groups

A method for the green, efficient, and highly regioselective functionalization of various glycopyranosides is presented. The method takes advantage of selected boronic acids as temporary protecting groups. Using this approach, a scalable procedure leading to a pure single regioisomer from unprotected methyl &#x3B1;-d-glucopyranoside was developed.

[Full Paper]
Sylvain Rocheleau, Joshua Pottel, Igor Huski&#x107;, Nicolas Moitessier
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601457. Read article

Ti-Catalyzed Synthesis of Exocyclic Allenes on Oxygen Heterocycles

23 gennaio, 2017 - 00:00

Ti‐Catalyzed Synthesis of Exocyclic Allenes on Oxygen Heterocycles

[Full Paper]
Natalia M. Padial, Carmen Hernández-Cervantes, Juan Muñoz-Bascón, Esther Roldán-Molina, Mireya García-Martínez, Ana Belén Ruiz-Muelle, Antonio Rosales, Míriam Álvarez-Corral, Manuel Muñoz-Dorado, Ignacio Rodríguez-García, J. Enrique Oltra
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601444. Read article

Hoveyda-Type Quinone-Containing Complexes – Catalysts to Prevent Migration of the Double Bond under Metathesis Conditions

23 gennaio, 2017 - 00:00

Hoveyda‐Type Quinone‐Containing Complexes – Catalysts to Prevent Migration of the Double Bond under Metathesis Conditions

[Full Paper]
Anna Kajetanowicz, Mariusz Milewski, Joanna Rogi&#x144;ska, Roman Gajda, Krzysztof Wo&#x17A;niak
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601344. Read article

Three-Component Povarov Reaction with Alcohols as Alkene Precursors: Efficient Access to 2-Arylquinolines

23 gennaio, 2017 - 00:00

 Efficient Access to 2‐Arylquinolines

[Full Paper]
Xinjian Li, Qi Xing, Pan Li, Jingjing Zhao, Fuwei Li
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601343. Read article

Synthesis of Nontoxic Fluorous Sphingolipids as Molecular Probes of Exogenous Metabolic Studies for Rapid Enrichment by Fluorous Solid Phase Extraction

23 gennaio, 2017 - 00:00

Synthesis of Nontoxic Fluorous Sphingolipids as Molecular Probes of Exogenous Metabolic Studies for Rapid Enrichment by Fluorous Solid Phase Extraction

Metabolites of sphingolipids (SLs) are known to act as signaling molecules called lipid mediators, which regulate cell behavior. The first synthesis of SLs bearing perfluoroalkyl (fluorous) chains is reported. These derivatives could be applicable in the functional analysis of their metabolic mechanisms by using fluorous solid-phase extraction (FSPE).

[Full Paper]
Shota Saito, Yuta Murai, Seigo Usuki, Masafumi Yoshida, Mostafa A. S. Hammam, Susumu Mitsutake, Kohei Yuyama, Yasuyuki Igarashi, Kenji Monde
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601302. Read article

Aromatic Esters, Carbinols, and Derivatives Thereof with Perfluorohexyl Residues as Alternatives to Perfluoroalkanecarboxylic and -sulfonic Acids

23 gennaio, 2017 - 00:00

Aromatic Esters, Carbinols, and Derivatives Thereof with Perfluorohexyl Residues as Alternatives to Perfluoroalkanecarboxylic and ‐sulfonic Acids

[Full Paper]
Torben Alpers, Thomas W. T. Muesmann, Oliver Temme, Jens Christoffers
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601298. Read article

Harnessing Cascade Suzuki-Cyclization Reactions of Pyrazolo[3,4-<i>b</i>]pyridine for the Synthesis of Tetracyclic Fused Heteroaromatics

23 gennaio, 2017 - 00:00

Harnessing Cascade Suzuki‐Cyclization Reactions of Pyrazolo[3,4‐b]pyridine for the Synthesis of Tetracyclic Fused Heteroaromatics

[Full Paper]
Hubert Lavrard, Florence Popowycz
Eur. J. Org. Chem., January 23, 2017, DOI: 10.1002/ejoc.201601242. Read article

Cytotoxic Vanadium Complexes of Branched [ONNO]-Type Diamine Bis(phenolato) Ligands

23 gennaio, 2017 - 00:00

Cytotoxic Vanadium Complexes of Branched [ONNO]‐Type Diamine Bis(phenolato) Ligands

Two vanadium(V) complexes, based on a common branched diaminobis(phenolato) ligand but differing in their labile ligands, are highly cytotoxic toward human colon and ovarian cells, including cells that are resistant to cisplatin. Their rapid loss of the labile group in water implies that, unlike the chelating ligand, the labile ligand type is insignificant.

[Full Paper]
Gilad Nahari, Lilia Reytman, Laure Vendier, Edit Y. Tshuva, Christian Lorber
Eur. J. Inorg. Chem., January 23, 2017, DOI: 10.1002/ejic.201601276. Read article

Resorcinarene-Based <i>o</i>-Biarylphosphines in Palladium-Catalysed Suzuki–Miyaura Cross-Coupling Reactions of Bulky Substrates

23 gennaio, 2017 - 00:00

Resorcinarene‐Based o‐Biarylphosphines in Palladium‐Catalysed Suzuki–Miyaura Cross‐Coupling Reactions of Bulky Substrates

The introduction of a 2-(dicyclohexylphosphino)phenyl unit as a substituent directly attached to a resorcinarene cavitand has been found to be a useful Buchwald-type ligand for the palladium-catalysed Suzuki–Miyaura cross-coupling of bulky aryl chlorides with sterically hindered arylboronic acids. This phosphine was found to be a superior ligand to SPhos, an analogue devoid of a cavity.

[Full Paper]
Fethi Elaieb, David Sémeril, Dominique Matt
Eur. J. Inorg. Chem., January 23, 2017, DOI: 10.1002/ejic.201601270. Read article

Synthesis and Characterisation of Heterobimetallic Lanthanoid O-Based Cluster/Cages

23 gennaio, 2017 - 00:00

Synthesis and Characterisation of Heterobimetallic Lanthanoid O‐Based Cluster/Cages

The synthesis of new mono- and heterobimetallic lanthanoid cluster compounds is reported. The ratio of the two lanthanoids in the heterobimetallic complexes appears to be dependent on the size and electron density of the metal atoms.

[Full Paper]
Philip C. Andrews, Guillaume Bousrez, Peter C. Junk, Dominique T. Thielemann, Melissa V. Werrett
Eur. J. Inorg. Chem., January 23, 2017, DOI: 10.1002/ejic.201601264. Read article

Vitamin B<sub>12</sub>–Metal Conjugates for Targeted Chemotherapy and Diagnosis: Current Status and Future Prospects

23 gennaio, 2017 - 00:00

 Current Status and Future Prospects

The abnormal demand for vitamin B12 in tumor cells can be exploited by designing tailored cobalamin-metallodrug conjugates in order to achieve targeted delivery into the diseased tissues for therapeutic and diagnostic applications

[Microreview]
Andrea Pettenuzzo, Rebecca Pigot, Luca Ronconi
Eur. J. Inorg. Chem., January 23, 2017, DOI: 10.1002/ejic.201601217. Read article

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