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Recent advances in functionalizations of helicene backbone.

Helicenes, chiral members of the family of polyaromatic hydrocarbons, have been increasingly used in variety of applications in recent years. Despite their intriguing properties, wider utilization is hindered by difficult functionalization of its skeleton, which would provide access to finely tuned derivatives of desired properties. Herein, the recent advancements in the field of helicene functionalization are discussed with emphasis on different types of transformations, their versatility and regioselectivity.