The invention refers to a method for isolating entecavir or an entecavir intermediate from a diluted mixture, the diluted mixture comprising entecavir and water or a mixture comprising an entecavir intermediate and other process reagents comprising:
(a) adsorbing the diluted mixture onto a hydrophobic resin bed;
(b) washing the resin bed with water to remove salt; and
(c) eluting the entecavir or entecavir intermediate from the resin bed with an organic solvent.
本发明涉及一种从稀释混合物中分离
恩替卡韦或
恩替卡韦中间体的方法,稀释混合物包括
恩替卡韦和
水或由
恩替卡韦中间体和其他工艺试剂组成的混合物,该方法包括:
(a) 将稀释混合物吸附在疏
水性
树脂床上;
(b) 用
水洗
树脂床以除去盐分;以及
(c) 用有机溶剂洗脱
树脂床中的
恩替卡韦或
恩替卡韦中间体。