Scheme 43. Synthesis of 1,7-Diazaperylene and Its Dialkyl Derivatives.
Reagents and conditions: (a)72 NOHSO4, conc. H2SO4, rt, 1 h, 91%; (b) CuCl, H2SO4, t-BuOH, 55–60 °C, then 10:1 25% NH3(aq)/CHCl3, rt, 24 h, 25%.
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