N-(4-Methoxybenzyl)aniline → 3-bromo-6-chloro-N-(4-methoxybenzyl)-N-phenylimidazo[1,2-b]pyridazin-8-amine

関与物質

反応条件

反応手順

N-(4-Methoxybenzyl)aniline (215 mg, 1 mmol) was dissolved in dry DMF (4 mL), placed under a nitrogen atmosphere, and cooled to 0° C. in an ice bath. Potassium t-butoxide (1 mL, 1 mmol, 1M THF solution) was added and the mixture was allowed to stir for 10 min at 0° C. and room temperature for 30 min. The resulting mixture was cool to 0° C. Solid 3,8-dibromo-6-chloroimidazo[1,2-b]pyridazine (310 mg, 1 mmol) from Example XXIV, step 1a was added. The mixture was allowed to stir for 30 min at 0° C. and overnight at room temperature. The mixture was diluted with ethyl acetate (100 mL), washed sequentially with 10% LiCl, water and brine, and dried over anhydrous magnesium sulfate. The solvent was removed in vacuo and the resulting material was purified by silica gel chromatography (ethyl acetate/heptane, 25 min gradient: 5-50% ethyl acetate) to provide 0.27 g of 3-bromo-6-chloro-N-(4-methoxybenzyl)-N-phenylimidazo[1,2-b]pyridazin-8-amine.

情報源と証拠