Linker-Based Hemisuccinate Derivatives of Artemisinin: Synthesis and Antimalarial Assessment against Multidrug-Resistant <i>Plasmodium yoelii nigeriensis</i> in Mice
作者:Chandan Singh、Rani Kanchan、Sandeep Chaudhary、Sunil K. Puri
DOI:10.1021/jm2010699
日期:2012.2.9
Artesunic acid 5, the hemisuccinate derivative of dihydroartemisinin 2, is the only clinically useful water-soluble derivative of artemisinin 1. However, being a lactol ester, it is rapidly hydrolyzed back to dihydroartemisinin in aqueous alkaline solution, a reaction that seriously limits its utility. A new series of potentially more stable linker-based hemisuccinate derivatives 12a–i and 14a–c have been prepared
青蒿琥酯5是双氢青蒿素2的半琥珀酸酯衍生物,是青蒿素1的唯一在临床上有用的水溶性衍生物。然而,作为一种乳糖醇酯,它在碱性水溶液中迅速水解回二氢青蒿素,这一反应严重限制了其实用性。已经准备了一系列可能更稳定的基于接头的半琥珀酸酯衍生物12a – i和14a – c。该过程涉及双氢青蒿素与各种二醇和聚乙二醇的酸催化反应,得到羟基官能化的醚7a – i和10a –c及其进一步衍生为半琥珀酸酯12a - i和14a - c。评估了羟基官能化的醚7a – i和10a – c以及它们的半琥珀酸酯衍生物12a – i和14a – c在瑞士小鼠中对多药耐药的约氏疟原虫的抗疟活性。这些半琥珀酸酯衍生物中的几种已显示出非常有前途的活性。半琥珀酸酯衍生物12f和12i,该系列中两种活性最高的化合物以24 mg / kg×4天的剂量为感染疟疾的小鼠提供100%的保护,因此效力是青蒿琥酯的两倍,后者以48 mg /