Sequence Stereoisomerism in Calixarene-Based Pseudo[3]rotaxanes

Two calix[6]arene directional wheels can be ordered in the right stereosequence by their through-the-annulus threading with a rationally designed bis(benzylalkylammonium) axle. These stereoisomeric pseudo[3]rotaxanes can be considered as a minimal informational system because the written information on the thread is transferred to a specific sequence stereoisomer.