Angewandte Chemie International Edition

Cover image for Vol. 54 Issue 42

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemPlusChem, Zeitschrift für Chemie

53_20i/2014Inside Cover: Asymmetric Catalysis on the Nanoscale: The Organocatalytic Approach to Helicenes (Angew. Chem. Int. Ed. 20/2014)

The asymmetric synthesis of helicenes by a Fischer indolization catalyzed by a SPINOL-derived phosphoric acid is reported by B. List et al. in their Communication on page 5202 ff. The catalyst is designed for long-range control and bears extended π-surfaces at the 3,3'-position. It creates a chiral nanometer-sized pocket, which enables π–π stacking interactions between the substituents and the reactive intermediate. A variety of (di)azahelicenes were obtained with good to excellent yields and enentioselectivities.

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