AXIALLY CHIRAL AMIDINIUM IONS WITH A BIARYL SKELETON - A NEW CLASS OF STRUCTURE IN HOST-GUEST CHEMISTRY

As receptors and catalysts in host–guest chemistry the title compounds can be recommended. The stereoselective ring closure of aminonitriles is the key to the synthesis of this new type of axially chiral cation. The chiral center of the side chain, which stems from an α‐amino acid, transfers its absolute configuration to the biaryl skeleton. This principle provides access to a wide variety of target structures such as 1. (Figure Presented.) Copyright © 1994 by VCH Verlagsgesellschaft mbH, Germany