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Cover Picture Cooperative Transition-Metal and Chiral Brnsted Acid Catalysis Enantioselective Hydrogenation of Imines To Form Amines (Angew. Chem. Int. Ed. 222011)

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D 3461
www.angewandte.org
2011–50/22
Nitroxide in Synthesis
A. Studer and L. Tebben
Protein Engineering
H. L. Ploegh and M. W.-L. Popp
Conjugated Polyelectrolytes
U. Scherf
ACIEFS 50 (22) 4991–5226 (2011) · ISSN 1433–7851 · Vol. 50 · No. 22
Cover Picture
Shaolin Zhou, Steffen Fleischer, Kathrin Junge, and Matthias Beller*
Modern metal catalysis combined with organocatalysis mediated by a chiral Brønsted
acid offers an attractive and environmentally favorable alternative to well-established
asymmetric hydrogenations with catalysts based on precious metals. M. Beller and coworkers describe in their communication on page 5120 ff. how the key to success is
the cooperative action of specific well-defined achiral iron complexes and chiral bulky
phosphoric acid esters.
Nitroxides in Synthesis
A. Studer and L. Tebben present in their Review on page 5034 ff. possible
applications of stable nitroxide radicals. The most important examples come from
oxidation reactions and radical (co)polymerizations.
Distance Measurements on Nucleic Acids in Cells
In their Communication on page 5070 ff., T. F. Prisner and co-workers use in-cell
pulsed electron–electron double-resonance spectroscopy to determine intramolecular
and intermolecular distances of nucleic acids in the nanometer range.
Exocytosis
C. Amatore et al. discuss in their Communication on page 5081 ff. the development
of an ITO microdevice that allows the simultaneous real-time monitoring of single
exocytotic events for single living cells.
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acid, forma, imine, 222011, cooperation, enantioselectivity, hydrogenation, transitional, amines, chiral, int, cover, angel, chem, metali, brnsted, catalysing, picture
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