Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture: Enantioselective Kita Oxidative Spirolactonization Catalyzed by In Situ Generated Chiral Hypervalent Iodine(III) Species (Angew. Chem. Int. Ed. 12/2010)
Conformationally flexible C2-symmetric chiral iodosylarene, which has been rationally designed based on secondary n–σ* or hydrogen-bonding interactions, is a highly effective catalyst for the Kita oxidative spirolactonization. As described by K. Ishihara and co-workers in their Communication on page 2175 ff., this catalysis provides the highest enantioselectivity (up to 92 % ee) among previous chiral hypervalent iodine-catalyzed reactions.
Also of Interest
Carbon nanotubes are frequently employed in biosensors, but what about single layers of carbon atoms—the emergent material graphene? In the Review on page 2114 ff., F. Braet et al. compare the two carbon allotropes with respect to their use in biosensors.
In their Communication on page 2140 ff., S. H. Yu and co-workers describe how the unique microstructures of seashell nacre can be mimicked by biologically inspired organic–inorganic hybrid films, which display high tensile strength.
Nanocomposites formed from platinum nanoparticles on the surface of a larger gold nanoparticle are much more active in the oxidation of formic acid than pure platinum catalysts, as G. Yin, Y. Lin et al. show on page 2211 ff. This system shows promise in formic acid fuel-cell applications.