Synthesis and Characterization of Asymmetric Azatwistarenes with Chiroptical Property

Three novel azatwistarenes 5a, 8, and 13 have been synthesized via the Povarov reaction and fully characterized. All of the enantiomers were separated using chiral high-performance liquid chromatography, and their optical properties were investigated through circular dichroism and circularly polarized luminescence spectra. In addition, such desired azatwistarenes have a positive response to acid in dichloromethane.