Abstract
Helicenes are polycyclic aromatic compounds with nonplanar screw-shaped skeletons formed by ortho-fused benzene or other aromatic rings. Since the first synthesis of helicenes was reported in 1903, helicene chemistry including their synthetic methodologies and applications has been greatly exerted. Especially in recent years, the helicence synthesis accompanied by the development of new synthetic reactions, have made such a remarkable progress. In this review, I would like to introduce the recent development of helicene synthesis.
