A Sterically Congested Nitrogenated Benzodipentaphene with a Double π-Expanded Helicene Structure
Organic Letters 22(9) : 3706−3711 (2020)
Abstract
Herein, we describe a series of three sterically congested nitrogenated benzodipentaphenes, one of which shows a highly distorted aromatic backbone with an unprecedented double π-expanded helicene structure.