HRID1626299
反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 25 °C
PROCEDURE
实验过程
A mixture of 2.50 g Linagliptin free base in 20 ml isopropanol was heated to reflux. To the hot suspension 646 mg benzoic acid dissolved in 5 ml isopropanol were added. The mixture was allowed to cool to about 25° C. and further stirred at the same temperature for about 7.5 hours. The solid was isolated by filtration and dried at 40° C. for about 13 hours to obtain 2.94 g crystalline Linagliptin benzoate of WO2010/072776 A1, which was confirmed to be Linagliptin benzoate form I by XRPD.
WORKUP
后处理
- temperaturewas heated to reflux
- additionwere added
- customThe solid was isolated by filtration
- customdried at 40° C. for about 13 hours