Hydrochloric Acid → 2-((6-(4-(2-Hydroxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-yl)amino)-1,3-thiazole-5-carboxylic acid

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Reaction Steps

Lithium hydroxide (23.4 g, 0.35 mol) and water (265 mL) were mixed in four-necked flask and dissolved by stirring, and then methyl 2-(6-(4-(2-hydroxyethyl)piperazin-1-yl)-2-methylpyrimidin-4-ylamino)thiazole-5-formate (Compound 6) (37.8 g, 0.1 mol) was added. After reaction at 50° C. for 3 h, cooled down to room temperature and pH value was adjusted to 6-6.5 by hydrochloric acid (6N). In cold storage grew the grain overnight. After suction filtration, the cake was dried to constant weight to give target Compound 7 (35.2 g, yield: 96.7%).

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