反应详情

温度

120 °C

By proceeding in a manner similar to Example 252(a) above but (i) using 4-nitro-1H-pyrazole-3-carboxylic acid (2-amino-4-methoxy-phenyl)-amide [410 mg, Reference Example 36(d)] and heating at 120° C. for 5 minutes, (ii) pouring the reaction mixture into water, adjusting to pH14 with 2N sodium hydroxide and filtering, and (iii) adjusting the pH of the filtrate to 6 with 2N hydrochloric acid and collecting the precipitate by filtration, there was prepared 5-methoxy-2-(4-nitro-1H-pyrazol-3-yl)-1H-benzoimidazole (327 mg) as a yellow powder. LC-MS (Method H): RT=1.61 minutes, 260.25 (M+H)+, 258.26 (M−H)−.

1. filtrationfiltering
2. customcollecting the precipitate
3. filtrationby filtration, there
4. customwas prepared 5-methoxy-2-(4-nitro-1H-pyrazol-3-yl)-1H-benzoimidazole (327 mg) as a yellow powder