Potassium Carbonate → 6-bromo-1-(2,3-dichlorobenzyl)-2-methyl-4-nitro-1H-benzo[d]imidazole

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A mixture of Example 1 (1.17 g) (prepared as described previously described), 1-(bromomethyl)-2,3-dichlorobenzene (1.19 g) and K2CO3 (1.27 g) in DMF (80 mL) was stirred at 80° C. for 3 h. When TLC showed no starting material, the mixture was cooled to room temperature and filtered. The filtrate was then poured into water. It was then filtered to afford a solid and the solid was washed with water and then dried in-vacuo to afford the desired product (1.59 g, 83%) 1H NMR (300 MHz, CDCl3) δ ppm 2.67 (s, 3H), 5.45 (m, 2H), 6.24 (t, 1H, J=7.8 Hz), 7.10 (t, 1H, J=7.8 Hz), 7.47 (t, 1H, J=7.8 Hz), 7.59 (d, 1H, J=1.8 Hz), 8.24 (d, 1H, J=1.8 Hz); LC-MS: m/e=416 [M+1]+.

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