Scheme 40. Synthesis of N-Doped Tetrabenzopentacenes and N-Doped Rubicenes.
Reagents and conditions: (a)69 KOH, o-xylene, reflux; (b) Pd(OAc)2, PCy3, DBU, DMA, 150 °C; (c) KOH, quinoline, 180 °C.
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