10-05-2013 | Shinsuke Inagi, Hiroyuki Nagai, Ikuyoshi Tomita, Toshio Fuchigami, Angewandte Chemie International Edition, 2013

Twice as good: Parallel electrochemical oxidation and reduction of a single parent polymer (P1) simultaneously provided two corresponding polymers (P2 and P3), which were easily separated. Upon UV irradiation, the color of the emissions of the P2 and P3 films were drastically different to ...

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10-05-2013 | Yifan Li, Jonathan P. Brand, Jérôme Waser, Angewandte Chemie International Edition, 2013

Chemical Matching: C2‐ or C3‐alkynylated furans were selectively synthesized by using gold catalysis. Direct C–H alkynylation of furans was achieved with C2 selectivity, and a domino cyclization/alkynylation process starting from allenes gave C3‐alkynylated products. The exact matching of ...

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10-05-2013 | Christoph Sämann, Matthias A. Schade, Shigeyuki Yamada, Paul Knochel, Angewandte Chemie International Edition, 2013

Highly functionalized cyclic and acyclic alkenylzinc reagents bearing functional groups such as aldehyde, keto, and ester groups were readily prepared by either direct zinc insertion in the presence of LiCl or by magnesium insertion in the presence of LiCl and ZnCl2. Subsequent ...

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10-05-2013 | Dong‐Liang Mo, Laura L. Anderson, Angewandte Chemie International Edition, 2013

Please pass the oxygen: A new method for the preparation of trans‐α,β‐epoxyketimines has been achieved through a copper‐catalyzed rearrangement of (E)‐α,β‐unsaturated nitrones. The scope and tolerance of the method is evaluated and the synthetic utility of the products is demonstrated. The ...

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10-05-2013 | Stephen Ho, Cyril Bucher, James L. Leighton, Angewandte Chemie International Edition, 2013

Less is more: An efficient synthesis of the anti‐mitotic macrolide dictyostatin proceeds with a longest linear sequence of 14 steps, and allows the rapid production of multi‐gram quantities of each of the three fragments from which the natural product is assembled in just four or five ...

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10-05-2013 | Angewandte Chemie International Edition, 2013

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10-05-2013 | Zhong‐Xing Zhang, Kerh Li Liu, Jun Li, Angewandte Chemie International Edition, 2013

Smart stars: A novel star–star supramolecular architecture was self‐assembled from a star‐shaped adamantyl‐terminated 8‐arm poly(ethylene glycol) and a star‐shaped poly(N‐isopropylacrylamide) with a β‐cyclodextrin core through inclusion complexation. The star–star supramolecules further ...

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10-05-2013 | Michael J. Krafft, Martina Bubrin, Alexa Paretzki, Falk Lissner, Jan Fiedler, Stanislav Záliš, Wolfgang Kaim, Angewandte Chemie International Edition, 2013

Step by step: Electron‐ and hydrogen‐transfer steps are documented IR‐spectroelectrochemically and structurally for the H2‐producing oxidation of a dicarbonylcobalt hydride complex modified by the sterically protecting 1,1′‐bis(diisopropylphosphino)ferrocene. The series complements the ...

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10-05-2013 | Bo Peng, Frank Smallenburg, Arnout Imhof, Marjolein Dijkstra, Alfons van Blaaderen, Angewandte Chemie International Edition, 2013

With (dumb)bells on: A variety of colloidal stereoisomers (all the same materials) have been prepared through evaporation of emulsions by using symmetric and asymmetric dumbbell‐shaped particles (see figure). The colloid configurations are in good agreement with the results of computer ...

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10-05-2013 | Patrizia Mamone, Grégory Danoun, Lukas J. Gooßen, Angewandte Chemie International Edition, 2013

New directions: The carboxylic acid functional group directs the ortho acylation of benzoic acids with carboxylic anhydrides in the presence of a rhodium catalyst (see scheme; cod=cyclo‐1,5‐octadiene). The acylation at the ortho position is complementary to the meta selectivity of ...

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