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Beilstein J. Org. Chem. 2026, 22, 372–382, doi:10.3762/bjoc.22.25
Graphical Abstract
Scheme 1: Recent examples of hetero[8]helicenes: (A) symmetric hetero[8]helicenes; (B) unsymmetrical hetero[8...
Scheme 2: Short-step synthesis of unsymmetrical oxaza[8]helicenes 5.
Figure 1: A plausible reaction mechanism: cyclic voltammetry (CV) analyses of hydroxycarbazole derivative 3 a...
Figure 2: Aromaticity of oxaza[8]helicenes: (A) NICS(0)zz and NICS(1)zz values of 5a and 5b calculated at MN1...
Figure 3: (P/M) Enantiomerization process of 5a (A), 5b (B), 6a (C), and 6b (D); relative Gibbs free energies...
Figure 4: Photophysical characters of oxaza[n]helicenes: (A) and (B) UV–vis absorption and PL spectra; (C) Fr...
Figure 5: Chiroptical properties of oxaza[n]helicenes: (A) CD spectra measured in chloroform (1 × 10−5 M); CP...