Scheme 168. Synthesis of Pyrenodiimidazole Polymers.
Reagents and conditions: (a)339 5-Bromothiophene-2-carbaldehyde, NH4OAc, AcOH, reflux, 10 h; (b) 1-bromooctadecane, DMF, 100 °C, 12 h; (c) Pd(PPh3)4, THF, 65 °C, 16–20 h.
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