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Unexpected formation of [5]helicenes from hexaarylbenzenes containing pyrrole moieties†
Felix Ammon,Stephanie Theresia Sauer,Rainer Lippert,Dominik Lungerich,David Reger,Frank Hampel,Norbert Jux
Organic Chemistry Frontiers Pub Date : 03/23/2017 00:00:00 , DOI:10.1039/C7QO00112F
Abstract

A synthetic route to hexaarylbenzenes containing up to six pyrrole units was developed. These pyrrole moieties are connected to the central benzene core via their β-carbon atom. Oxidative cyclodehydrogenation of systems containing one pyrrole ring led to the formation of [5]helicenes instead of the completely fused coronene-like structure.

Graphical abstract: Unexpected formation of [5]helicenes from hexaarylbenzenes containing pyrrole moieties
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