Syntheses of Some Substituted Isatin-β-thiosemicarbazones and Isatin-β-hydrazonothiazoline Derivatives as Potential Antiviral and Antimicrobial Agents
作者:A.-Mohsen M. E. Omar、Nabil H. Eshba、Hassan M. Salama
DOI:10.1002/ardp.19843170810
日期:——
A series of isatin‐β‐thiosemicarbazones and isatin‐β‐hydrazonothiazolines was synthesized by condensation of various isatin derivatives with N4‐substituted 3‐thiosemicarbazides and cyclization of the products by phenacyl bromides. The products showed high toxicity at lower concentrations when tested for antiviral activity against MDCK cells and did not exhibit antimicrobial activity against various
antibacterial activity against B. subtilis and K. pneumoniae and also complex 2 has shown good antifungal activity against the micro organisms. The antioxidant activity analysis revealed that the complex 3 showed significant activity with IC50 values 7.24 ± 0.09 µM. Moreover, the in vitro antiproliferative activity results suggested that complex 3 exhibited high activity against HeLa cell line compared with
Karali; Gursoy, Il Farmaco, 1994, vol. 49, # 12, p. 819 - 822
作者:Karali、Gursoy
DOI:——
日期:——
Somogyi, Laszlo, Liebigs Annalen der Chemie, 1993, # 8, p. 931 - 934
作者:Somogyi, Laszlo
DOI:——
日期:——
Synthesis and evaluation of isatin-β-thiosemicarbazones as novel agents against antibiotic-resistant Gram-positive bacterial species
作者:Xu-Meng Zhang、Hui Guo、Zai-Shun Li、Fu-Hang Song、Wei-Min Wang、Huan-Qin Dai、Li-Xin Zhang、Jian-Guo Wang
DOI:10.1016/j.ejmech.2015.06.047
日期:2015.8
Methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE) have caused an increasing mortality rate, which means that antibiotic resistance is becoming an important health issue. In the course to screen new agents for resistant bacteria, we identified that a series of isatin-beta-thiosemicarbazones (IBTs) could inhibit the growth of MRSA and VRE. This was the first time that the "familiar" IBT compounds exhibited significant anti Gram-positive pathogen activity. Against a clinical isolated MRSA strain, 20 of the 51 synthesized compounds showed minimum inhibitory concentration (MIC) data of 0.78 mg/L and another 12 novel compounds had MICs of 0.39 mg/L. Moreover, these compounds also inhibited Enterococcus faecalis and VRE at similar levels, indicating that IBTs might have different mode of action compared with vancomycin. For these IBTs, comparative field analysis (CoMFA) models were further established to understand the structure activity relationships in order to design new compounds from steric and electrostatic contributions. This work has suggested that IBTs can be considered as potential lead compounds to discover antibacterial inhibitors to combat drug resistance. (C) 2015 Elsevier Masson SAS. All rights reserved.