Scheme 3. Synthesis of [33](1,3,5)CPs by the TosMIC coupling reaction: (1) and (2) one-step coupling, (3) two-step coupling. a) NaOH, CH2Cl2-H2O, Bu4NI, b) conc HCl, CH2Cl2, c) NH2NH2・H2O, KOH, HO(CH2CH2O)3H, c') NH2NH2 ・H2O, KOH, (HOCH2CH2)2O, d) NaH, DMF, r.t.