Mycobacterium tuberculosis (Mtb), the principal etiological agent of tuberculosis (TB), infects over one-quarter of humanity and is now the leading cause of infectious disease mortality by a single pathogen. Macozinone 2-[4-(cyclohexylmethyl)piperazin-1-yl]-8-nitro-6-(trifluoromethyl)-4H-1,3-benzothiazin-4-one, C20H23F3N4O3S} is a promising new drug for treating drug-sensitive and drug-resistant TB that has successfully completed phase I clinical trials. We report the complete spectroscopic and structural characterization by 1H NMR, 13C NMR, HRMS, IR, and X-ray crystallography. The cyclohexyl moiety is observed to be nearly perpendicular to the core formed by the 1,3-benzothiazin-4-one and piperazine groups. The central piperazine ring adopts a slightly distorted chair conformation caused by sp
2-hybridization of the nitro N atom, which donates into the electron-deficient 1,3-benzothiazin-4-one group.
结核分枝杆菌(Mtb)是结核病(TB)的主要病原体,感染了超过四分之一的人口,目前是单一病原体导致传染病死亡的主要原因。麦考嗪酮2-[4-(环己基甲基)哌嗪-1-基]-8-硝基-6-(三氟甲基)-4H-1,3-苯并噻嗪-4-酮,C20H23F3N4O3S}是一种治疗对药物敏感和耐药结核病的有前途的新药,已成功完成了 I 期临床试验。我们报告了通过 1H NMR、13C NMR、HRMS、IR 和 X 射线晶体学进行的完整光谱和结构表征。据观察,环己基与 1,3-苯并噻嗪-4-酮和哌嗪基团形成的核心几乎垂直。中央的哌嗪环由于硝基的 sp
硝基 N 原子的 sp2 杂化作用,使其捐献给缺电子的 1,3-苯并噻嗪-4-酮基团,从而使哌嗪环的中心呈现出略微扭曲的椅状构象。