A method for preparing a drug complex in which a polysaccharide derivative having carboxyl groups and a residue of a drug compound are bound to each other by means of a spacer comprising an amino acid or a spacer comprising peptide-bonded 2 to 8 amino acids, or a drug complex in which a polysaccharide derivative having carboxyl groups and a residue of a drug compound are bound to each other without the spacer, characterized in that an organic amine salt of the polysaccharide derivative having carboxyl groups is reacted with the drug compound or the spacer bound to the drug compound in a non-aqueous system. The reaction between the polysaccharide derivative having carboxyl groups and the drug compound bound with the spacer or the like can be carried out in high yields, and when a drug compound having a lactone ring is subjected to the reaction, side reactions can be reduced.
一种制备药物复合物的方法,其中通过含有羧基的
多糖衍
生物和药物化合物残基之间的间隔物,该间隔物包括
氨基酸或由肽键连接的2至8个
氨基酸的间隔物,或者在没有间隔物的情况下将含有羧基的
多糖衍
生物和药物化合物残基结合在一起,其特征在于,将含有羧基的
多糖衍
生物的有机胺盐与药物化合物或与药物化合物结合的间隔物在非
水系统中反应。含有羧基的
多糖衍
生物和与间隔物结合的药物化合物之间的反应可以高产率地进行,当药物化合物具有内酯环时,副反应可以被减少。