π-Conjugated Conjoined Double Helicene via a Sequence of Three Oxidative CC- and NN-Homocouplings

摘要

The synthesis of 1 provides a novel, highly efficient approach to a chiral π-conjugated conjoined double helicene with remarkable configurational stability. Considering the molecular shape, the hydrazine moieties of 1, and the possible analogues of 1, organic materials that are strongly chiral, electroactive, and isotropic may be envisioned. Resolution and syntheses of analogues of 1 with extended conjoined helical structures are being pursued.