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Using the general procedure described above, the reaction of 6 (181 mg, 0.59 mmol) and 3-bromoaniline (771 mg, 4.48 mmol), was run for 26 hours, to provide 209 mg of 7 as a white solid in 80% yield. TLC Rf 0.28 (chloroform-methanol 20:1); mp 286.7-287.5° C.; 1H NMR (DMSO-d6) δ 1.27 (s, 9H, C(CH3)3), 7.19-7.49 (m, 4H, Ar—H), 8.18-8.46 (m, 4H, Ar—H), 8.79 (s, 1H, 4-NH, exch), 9.64 (s, 1H, 2-NH, exch), 11.89 (s, 1H, 9-NH, exch). Anal. Calculated (C21H20BrN5O): C, 57.54; H, 4.59; N, 15.97; Br, 18.22. Found: C, 57.34; H, 4.65; N, 15.80; Br, 17.96.