Benzoxaborole Antimalarial Agents. Part 5. Lead Optimization of Novel Amide Pyrazinyloxy Benzoxaboroles and Identification of a Preclinical Candidate
作者:Yong-Kang Zhang、Jacob J. Plattner、Eric E. Easom、Robert T. Jacobs、Denghui Guo、Yvonne R. Freund、Pamela Berry、Vic Ciaravino、John C. L. Erve、Philip J. Rosenthal、Brice Campo、Francisco-Javier Gamo、Laura M. Sanz、Jianxin Cao
DOI:10.1021/acs.jmedchem.7b00621
日期:2017.7.13
resistant to chloroquine and pyrimethamine. The rapid parasite in vitro reduction and in vivo parasite clearance profile of 46 were similar to those of artemisinin and chloroquine, two rapid-acting antimalarials. It was nongenotoxic in an Ames assay, an in vitro micronucleus assay, and an in vivo rat micronucleus assay when dosed orally up to 2000 mg/kg. The combined properties of this novel benzoxaborole
为了确定具有令人满意的抗疟活性,理化性质,药代动力学特征,体内功效和安全性特征的分子,对羧酰胺基吡嗪酰氧基苯并氧杂硼酸酯进行了研究。这项优化工作发现了46个,满足了我们的目标候选人档案。化合物46对培养的恶性疟原虫具有优异的活性,并且在感染的小鼠体内对恶性疟原虫和伯氏疟原虫具有体内活性。它在小鼠,大鼠和狗中表现出良好的PK特性。它对其他11种恶性疟原虫非常活跃菌株,大多数对氯喹和乙胺嘧啶有抗性。46种体外快速寄生虫减少和体内寄生虫清除率特征与青蒿素和氯喹(两种速效抗疟药)相似。当口服剂量高达2000 mg / kg时,在Ames分析,体外微核分析和体内大鼠微核分析中均无遗传毒性。这种新颖的苯并氧杂硼酸酯的综合性能支持其向临床前发展的进程。