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Synthesis of the macrocyclic architectures (5T)2‐PBI and 5T‐PBI. Reagents and conditions: i) Zn(OAc)2, imidazole, microwave irradiation. ii) Sn(C4H9)3Cl, n‐BuLi, THF, r.t., overnight. iii) Pt(COD)Cl2, toluene, 95 °C. iv) Toluene, 75 °C, overnight, then dppf, CH2Cl2, r.t., 6 h, then m‐xylene, 120 °C, overnight. Dppf=1,1′‐Ferrocenediyl‐bis(diphenylphosphine); COD=1,5‐Cyclooctadiene.
