3-Chlorobenzoic acid hydrazide was reacted with different aryl isothiocyanates to give the corresponding 1-(3-
chlorobenzoyl)-4-substituted thiosemicarbazides 1-16. Reaction yields ranged from 74 to 96%. Structures of the synthesized
compounds were defined on the basis of 1H NMR and IR spectra. As it was showed the antibacterial activity of the
obtained compounds was limited only towards Gram-positive bacteria. As regards B. cereus ATCC 10876, 1-(3-
chlorobenzoyl)-4-(3,5-dichlorophenyl)thiosemicarbazide (8) was 16 times more active than ampicillin and 8 times more
active than cefuroxime.
3-氯苯甲酸酰肼与不同的芳基异硫氰酸酯反应,得到相应的 1-(3-氯苯甲酰基)-4-取代的硫代氨基甲酰肼 1-16。反应产率为 74% 至 96%。根据 1H NMR 和 IR 光谱确定了合成化合物的结构。结果表明,所获化合物的抗菌活性仅限于革兰氏阳性菌。对于 B. cereus ATCC 10876,1-(3-氯苯甲酰基)-4-(3,5-二氯苯基)硫代氨基甲酰肼(8)的活性是氨苄西林的 16 倍,是头孢呋辛的 8 倍。
Synthesis and in vitro activity of 1,2,4-triazole-ciprofloxacin hybrids against drug-susceptible and drug-resistant bacteria
A series of novel 1,2,4-triazole-ciprofloxacin hybrids was designed, synthesised and evaluated in vitro against drug-susceptible and drug-resistant bacteria. A significant part of the compounds obtained showed antibacterial activity higher than the activity of ciprofloxacin, both towards Gram-positive and Gram-negative species. Despite relatively small number of synthesised derivatives, it was possible to observe important dependences between their structure and activity. (C) 2012 Elsevier Masson SAS. All rights reserved.