Synthesis and evaluation of trypanocidal activity of derivatives of naturally occurring 2,5-diphenyloxazoles
作者:Koichi Narita、Keisuke Suganuma、Toshihiro Murata、Ryutaro Kondo、Hiroka Satoh、Kazuhiro Watanabe、Kenroh Sasaki、Noboru Inoue、Yuichi Yoshimura
DOI:10.1016/j.bmc.2021.116253
日期:2021.7
products reportedly exhibit trypanocidal activity. Naturally occurring 2,5-diphenyloxazoles present in Oxytropis lanata, and their derivatives, were synthesized. The trypanocidal activities of the synthesized compounds were evaluated against Trypanosoma brucei brucei, T. b. gambiense, T. b. rhodesiense, T. congolense, and T. evansi. Natural product 1 exhibited trypanocidal activity against all the species/subspecies
非洲锥虫病是一种影响神经系统的人畜共患原生动物疾病。据报道,各种天然产物具有杀锥虫活性。合成了天然存在于Oxytropis lanata 中的2,5-二苯基恶唑及其衍生物。对合成化合物的锥虫杀灭活性进行了评估,以对抗布氏锥虫,T. b. 冈比亚锥虫,布氏锥虫 rhodesiense、T. congolense和T. evansi。天然产物1对锥虫的所有物种/亚种表现出杀灭锥虫的活性,表现出半数最大抑制浓度 (IC 50) 的 1.1–13.5 μM。恶唑核的修饰提高了锥虫杀灭活性。1,3,4-恶二唑 ( 7 ) 和 2,4-二苯基恶唑 ( 9 ) 类似物表现出优于1 的效力。然而,这些化合物在 Madin-Darby 牛肾细胞中表现出细胞毒性。所述Ô甲基化的类似物1(12)是无细胞毒性的并且表现出选择性的杀锥虫针对活动T. congolense(IC 50 = 0.78微米)。2,5-二