Pentiptycene building blocks derived from nucleophilic aromatic substitution of pentiptycene triflates and halides.
The nucleophilic aromatic substitution (S(N)Ar) reactions of the nitro-substituted pentiptycene triflate 15 with LiBr and LiI and the resulting halides 18 and 19 with N(3)(-), CN(-), and ArS(-) in DMF provide an efficient route toward pentiptycene halides and dihalides and other new pentiptycene building blocks. The reactivity of diaminopentiptycene in Pd-catalyzed C-N coupling reactions is also demonstrated.
Department of Chemistry, National Taiwan University, Taipei, Taiwan 10617.
Sandip Kumar
SK
Kundu
Wei Shyang
WS
Tan
Jyu-Lun
JL
Yan
Jye-Shane
JS
Yang