4,7-dibromo-2-(pyridin-4-yl)-2H-benzo[d][1,2,3]triazole → 2-(pyrazin-2-yl)-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-(pyrazin-2-yl)-2H-benzo[d][1,2,3]triazole (23% yield) in the first step and 4,7-dibromo-2-(pyrazin-2-yl)-2H-benzo[d][1,2,3]triazole (Intermediate B, 26%) in the second step. 1H NMR (400 MHz, CDCl3): δ 9.75 (d, J=1.5 Hz, 1H, pyrazine), 8.81 (d, J=2.2 Hz, 1H, pyrazine), 8.71 (dd, J=2.5 and 1.5 Hz, 1H, pyrazine), 7.56 (s, 2H, benzotriazole).

Provenance & Evidence