An oven-dried Schlenk tube was charged with o-phenylene heptamer diester (1 equiv) and imidazole (30 equiv), then evacuated and backfilled with argon (3x). To the tube, under a positive pressure of argon, was added the appropriate amine (3.5 equiv) and degassed 1,2dichlorobenzene. The mixture was degassed by three freeze-pump-thaw cycles and filled with argon. The reaction mixture was heated at 185 • C (silicone oil bath) for 24 h, then poured into methanol while hot. The resulting precipitate was collected via vacuum filtration and the precipitate washed with water. The crude product was purified by flash chromatography (1:9 EtOAc:hexanes).