Synthesis and Characterization of a Pentiptycene-Derived Dual Oligoparaphenylene Nanohoop.

Structural designs combining oligoparaphenylene-derived nanohoops with other functional organic building blocks should lead to novel molecular architectures with intriguing properties. Herein, we describe the synthesis of a pentiptycene-derived chiral dual nanohoop molecule with key steps including ring expansion through dianthracene cycloreversion and transannular [4+2] cycloaddition across a 64-membered macrocycle. The crystal structure of the nanohoop molecule displays an ordered packing pattern with long-range channels in the solid state. Furthermore, nonracemizable enantiomers of the nanohoop were obtained through resolution and exhibited promising chiroptical properties.

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