4,7-dibromo-2-(pyridin-4-yl)-2H-benzo[d][1,2,3]triazole → 2-(4-nitrophenyl)-2H-benzo[d][1,2,3]triazole

Participants

Reaction Steps

A similar two-step procedure as that of Intermediate A was applied to give 2-(4-nitrophenyl)-2H-benzo[d][1,2,3]triazole (16% yield) in the first step and 4,7-dibromo-2-(4-nitrophenyl)-2H-benzo[d][1,2,3]triazole (Intermediate C, 75%) in the second step. 1H NMR (400 MHz, CDCl3): δ 8.65 (m, 2H, 4-nitrophenyl), 8.44 (m, 2H, 4-nitrophenyl), 7.54 (s, 2H, benzotriazole).

Provenance & Evidence