Synthesis, characterization, antimicrobial, anticancer, and antituberculosis activity of some new pyrazole, isoxazole, pyrimidine and benzodiazepine derivatives containing thiochromeno and benzothiepino moieties

Abstract

In an attempt to find a new class of antimicrobial, anticancer, and antituberculosis agents, a series of pyrazole, isoxazole, pyrimidine and benzodiazepine derivatives containing thiochromeno and benzothiepino moieties were prepared via the reaction of diketoester 2 and 11 with appropriate chemical reagents. Single crystal XRD studies have been done on compounds 3 and 12. All compounds were evaluated for antimicrobial, anticancer, and antituberculosis activity. The benzodiazepine compounds (9 and 18) displayed the highest activity among the tested compounds with an IC50 equal to 15 and 16 μM for HeLa cells, and 13 and 12 μM for HCT116 cells. They were also found to be more active against H37Rv with an MIC of 7.0 and 6.5 μM compared to other analogues. Similarly these compounds (9 and 18) showed higher activity than chloroamphenicol against Klebsiella pneumoniae and Escherichia coli.