In this work, two new drug substituted monomers and new homogenous and heterogeneous polymers were synthesized which loaded with medicinal properties to extend the controlled drug. The first step includes the preparation maleimic acid (L1) and (L2) via reaction of maleic anhydride with 5-amino salicylic acid. Then compound L2 was converted to its corresponding acyl chloride derivative which reacted with amino drugs (theophylline and chlordiazepoxide, afforded L3 and L4 monomers, respectively. Homogeneous polymers (L5 and L6) prepared through polymerization reaction of free radicals of monomers (L1) and (L2) under nitrogen atmosphere using methyl ethyl ketone peroxide (MEKP) as initiator. Heterogeneous polymers (L7 and L8) prepared through polymerization reaction of free radicals of monomers (L1 and L2), separately with acrylic acid under nitrogen atmosphere using MEKP as initiator. All these prepared monomers and polymers were characterized by FTIR, 1H NMR and 13C NMR. Controlled drug release and swelling % was studied in different pH values at 37 ºC. Intrinsic viscosities were measured at 25 ºC with Ostwald viscometer and applied the characteristic of solubility for these polymers and studied the biological activities.
在本研究中,合成了两种新型药物取代单体及其均相和异相聚合物,这些聚合物具有载药特性,用于延长控释药物。第一步包括通过
马来酸酐与
5-氨基水杨酸反应制备
马来酸(L1)和(
L2)。然后将化合物
L2转化为相应的酰
氯衍
生物,该衍
生物与
氨基药物(茶碱和
氯氮平)反应,分别得到单体L3和L4。均相聚合物(L5和L6)通过在氮气气氛下使用
甲基乙基酮过氧化物(MEKP)作为
引发剂,对单体(L1)和(
L2)进行自由基聚合反应制备。异相聚合物(L7和L8)通过在氮气气氛下使用MEKP作为
引发剂,分别将单体(L1和
L2)与
丙烯酸进行自由基聚合反应制备。所有这些制备的单体和聚合物均通过FTIR、1H NMR和13C NMR进行了表征。在37ºC下,研究了不同pH值下的控释药物释放和膨胀百分比。使用Ostwald粘度计在25ºC下测量了特性粘度,并研究了这些聚合物的溶解性特征和
生物活性。