Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture: Metal-Free, Cooperative Asymmetric Organophotoredox Catalysis with Visible Light (Angew. Chem. Int. Ed. 4/2011)
Highly enantioselective α-alkylations of aldehydes are achieved through the cooperative combination of an organocatalytic cycle and a photocatalytic cycle—represented by the slices of citrus fruits in the “catalytic cocktail”. The beautifully orange-colored photocatalyst eosin Y and green-light irradiation are used to replace noble-metal catalysts, as explained by K. Zeitler et al. in their Communication on page 951 ff. (Cover graphics were designed in cooperation with Georg Neumann.)
Also of Interest
In their Review on page 826 ff., G. R. Patzke and co-workers describe recent developments in the field of oxide nanomaterials. Particular emphasis is placed on applications, new synthetic methods, and in situ techniques for studying formation mechanisms.
A rhenium carbonyl complex can be mapped inside cancer cells by its IR signature and used to analyze cell topography. C. Policar et al. describe this new approach to imaging in their Communication on page 860 ff.
In their Communication on page 865 ff., K. K Baldridge, J. S. Siegel, and co-workers report how an enantiopure rhodium(I) dimethylnorbornadiene reagent can be used in the dynamic resolution of interconverting enantiomers of sym-pentasubstituted corannulenes.