Benzimidazoquinazolines as new potent anti-TB chemotypes: Design, synthesis, and biological evaluation
作者:Pradeep S. Jadhavar、Kshitij I. Patel、Tejas M. Dhameliya、Nirjhar Saha、Maulikkumar D. Vaja、Vagolu Siva Krishna、Dharmarajan Sriram、Asit K. Chakraborti
DOI:10.1016/j.bioorg.2020.103774
日期:2020.6
intermediately formed 2-(o-aminoaryl)benzimidazole with trialkyl orthoformate/acetate. The resultant benzimidazoquinazolines were evaluated in vitro for anti-TB activity against M. tuberculosis H37Rv (ATCC27294 strain). Fourteen compounds exhibiting MIC values in the range of 0.4-6.25 µg/mL were subjected to cell viability test against RAW 264.7 cell lines and were found to be non-toxic (<30% inhibition at
为了寻找作为抗结核病药物的新分子实体,采用支架跳跃策略设计了苯并咪唑并喹唑啉多杂环支架。通过改进的邻苯二胺与isatoic酸酐的串联脱羧亲核加成环缩合反应,然后进一步将中间形成的2-(邻氨基芳基)苯并咪唑与原甲酸三烷基酯/乙酸酯进一步环缩合,合成了32种化合物。体外评估所得的苯并咪唑并喹唑啉类抗结核分枝杆菌H37Rv(ATCC27294菌株)的抗TB活性。对MIC值在0.4-6.25 µg / mL范围内的14种化合物进行了针对RAW 264.7细胞系的细胞生存力测试,发现它们是无毒的(在50 µg / mL下抑制率小于30%)。进一步评估了活性化合物的抗INH抗性Mtb菌株。还发现活性最高的化合物6x [MIC(H37Rv)为0.4 µg / mL]和化合物6d [MIC(H37Rv)为0.78 µg / mL]对INH抗性Mtb菌株具有MIC和MIC值分别为12.5和0.78 µg。 /