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Synthesis of 1,2,6,7-tetraazocoronenes via the cycloaddition of 4-(n-alkyl)-1,2,4-triazol-3,5-dione to 3,(9 and10)-dialkyl perylenes [183,184]. Reagents and conditions: (a) for all combinations of 75, 81, and 83 with 88-92: xylene, rfx, Y = 82% (for the reaction of 81 with 88; yields for other substituents were not reported) [183] and (b) for the cycloaddition of 73, 75, 81, 82, and 84-87 with 91: xylene, rfx; Y = up to 95% [184].
