Abstract
In general, aromatic cores are stable owing to their resonance energies. Different
from facile peripheral modifications of aromatic cores, transforming an aromatic core
into a different skeleton is ambitious and has attracted only little attention as
a general synthetic method. This personal account shows our journey to inventing transformations
of dibenzothiophenes into triphenylenes, carbazoles, and spirocyclic diarylfluorenes
and to establishing ‘aromatic metamorphosis’ as a useful and game-changing strategy
in organic synthesis.
1 Introduction
2 Aromatic Metamorphosis
3 From Dibenzothiophenes to Triphenylenes
4 From Dibenzothiophenes to Carbazoles
5 From Dibenzothiophenes to Spirocyclic Tetraarylmethanes
6 Conclusion
Key words
dibenzothiophenes - palladium - arylations - nucleophilic aromatic substitution -
umpolung