substituted BTZs were not affected by either nitro or trifluoromethyl at 6-position. Trifluoromethyl plays an important role in maintaining anti-tubercular activity in the piperazine or piperidine analogs. Compound 8o, which contains an azaspirodithiolane group, showed a MIC of 0.0001 μM against M. tuberculosis H37Rv, 20-fold more potent than BTZ043 racemate. These results suggested that the volume and lipophilicity
合成了N-烷基和杂环取代的1,3-苯并
噻嗪-4-酮(BTZ)衍
生物。这些化合物的抗分枝杆菌活性通过确定结核分枝杆菌H37Ra和结核分枝杆菌H37Rv的最低抑菌浓度(MIC)进行评估。发现延长的或支链的烷基链类似物可以增强效能,并且N-烷基取代的BTZ的活性不受6-位硝基或三
氟甲基的影响。三
氟甲基在维持
哌嗪或
哌啶类似物中的抗结核活性中起重要作用。含氮杂螺二
硫杂
环戊酸酯基团的化合物8o对结核分枝杆菌的MIC为0.0001μ
MH37Rv,效力比BTZ043外消旋体高20倍。这些结果表明,取代基的体积和亲脂性对于维持活性很重要。此外,化合物8o对Vero细胞无毒,在初步药代动力学研究中口服可
生物利用。