Preparation of Bis(<i>m</i>‐phenylene)‐32‐crown‐10‐Based Cryptand/Bisparaquat [3]Rotaxanes with High Efficiency

Abstract

Abstract Two [3]rotaxanes were synthesized from two bis( m ‐phenylene)‐32‐crown‐10‐based cryptands and a bisparaquat derivative by using a threading‐followed‐by‐stoppering method. As a result of strong association and positive cooperative complexation between the cryptands and the bisparaquat derivative, high yields and high selectivities were achieved. No [2]rotaxanes were found during the preparation.(© Wiley‐VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2008)