1,1'-Carbonyldiimidazole → 8-Bromo-7-(4-chlorophenyl)[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one

関与物質

反応条件

反応手順

Crude 3-bromo-4-(4-chlorophenyl)-2-hydrazinylpyridine (7 g, 23 mmol) was dissolved in dry THF (100 mL), and the resulting solution was cooled to 0° C. To this was added 1,1′carbonyldiimidazole (18 g, 111 mmol). The reaction mixture was stirred at room temperature for 10 h. The solvent was evaporated under vacuum, and water (10 mL) was added, which caused solid desired product to precipitate. This was filtered, washed with water (2×25 mL), and dried to obtain the title compound as a yellow solid (6.3 g), which was used without further purification.

情報源と証拠