反应详情

Pitavastatin sodium (5.22 g) prepared according to U.S. Pat. Nos. 5,011,930 A, 5,856,336 A and 5,872,130 A is dissolved in a mixture of 75 ml of water and 15 ml of ethanol and stirred at room temperature under a nitrogen atmosphere. Successively 12 ml of 1 mol/L calcium acetate in water is added drop wise thereto over 20 minutes. The reaction mixture is stirred at the ambient temperature for 3 hours, and the resulting precipitate is collected, washed with water and dried to give 4.5 g of crude pitavastatin calcium salt material.

1. stirringThe reaction mixture is stirred at the ambient temperature for 3 hours
2. customthe resulting precipitate is collected
3. washwashed with water
4. customdried