反应详情

Isobutyryl chloride (181 μL, 1.73 mmol) was added to a solution of 1-(4-aminobutyl)-2-ethoxymethyl-6-methyl-1H-imidazo[4,5-c]pyridin-4-amine (0.435 g, 1.57 mmol), triethylamine (280 μL, 2.04 mmol) and chloroform (8 mL). The reaction mixture was allowed to stir at ambient temperature for 4 hours then it was diluted with chloroform (20 mL) and washed with saturated sodium bicarbonate solution (10 mL). The organic layer was dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by column chromatography (30 g of silica gel eluting with 1 L of 2% methanol in chloroform containing 0.5% triethylamine) to provide 0.225 g of N-{4-[4-amino-2-(ethoxymethyl)-6-methyl-1H-imidazo[4,5-c]pyridin-1-yl]butyl}-2-methylpropanamide as a white powder, m.p. 170.5–172.5° C.

1. washwashed with saturated sodium bicarbonate solution (10 mL)
2. dry with materialThe organic layer was dried over magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe residue was purified by column chromatography (30 g of silica gel eluting with 1 L of 2% methanol in chloroform containing 0.5% triethylamine)