Design, synthesis, antileishmanial, and antifungal biological evaluation of novel 3,5‐disubstituted isoxazole compounds based on 5‐nitrofuran scaffolds
作者:Ozildéia S. Trefzger、Natália V. Barbosa、Renata L. Scapolatempo、Amarith R. Neves、Maria L. F. S. Ortale、Diego B. Carvalho、Antônio M. Honorato、Mariana R. Fragoso、Cristiane Y. K. Shuiguemoto、Renata T. Perdomo、Maria F. C. Matos、Marilene R. Chang、Carla C. P. Arruda、Adriano C. M. Baroni
DOI:10.1002/ardp.201900241
日期:2020.2
Nineteen 3,5‐disubstituted‐isoxazole analogs were synthesized based on nitrofuran scaffolds, by a [3 + 2] cycloaddition reaction between terminal acetylenes and 5‐nitrofuran chloro‐oxime. The compounds were obtained in moderate to very good yields (45–91%). The antileishmanial activity was assayed against the promastigote and amastigote forms of Leishmania (Leishmania) amazonensis. Alkylchlorinated
基于硝基呋喃支架,通过末端乙炔和 5-硝基呋喃氯肟之间的 [3 + 2] 环加成反应合成了 19 种 3,5-二取代的异恶唑类似物。以中等至非常好的产率 (45–91%) 获得这些化合物。针对前鞭毛体和无鞭毛体形式的利什曼原虫 (Leishmania) amazonensis 测定了抗利什曼原虫活性。烷基氯化化合物 14p–r 对前鞭毛体和无鞭毛体形式均有活性,重点是化合物 14p,它对无鞭毛体形式表现出很强的活性(IC50 = 0.6 μM 和选择性指数 [SI] = 5.2)。在烷基系列中,化合物 14o 以无鞭毛体形式的 IC50 = 8.5 μM 和 SI = 8.0 脱颖而出。在芳香族系列中,最活跃的化合物是那些含有电子给体基团的化合物,如三甲氧基异恶唑 14g (IC50 = 1. 2 μM 和 SI = 20.2);化合物 14 小时,IC50 = 7.0 μM,SI = 6