Pyridine → 2-(6-(4-(2-Benzyloxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-ylamino)thiazole-5-formic acid

Participants

Reaction Conditions

Reaction Steps

2-(6-(4-(2-hydroxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-ylamino)thiazole-5-formic acid (Compound 7) (30 g, 0.082 mol), pyridine (300 mL) and DMAP (0.3 g) were mixed in a four-necked flask, and acetic anhydride was added by droplet when the temperature was controlled at 30° C. After adding, it was heated up to 50° C. and reacted overnight in thermal insulation. After reaction it was cooled down to room temperature and grew the grain overnight. After air pump filtration, the cake was rinsed by suitable amount of methylene dichloride. Then the cake was taken up and put into methylene dichloride (150 mL) and stirred for 30 min at room temperature. After air pump filtration the cake was dried to constant weight by blast at 60° C. to give light yellow to off-white solid target Compound 17 (Pg is acetyl) (24 g, yield: 71.7%).

Provenance & Evidence