Synthesis and antibacterial activity of N-(5-benzylthio-1,3,4-thiadiazol-2-yl) and N-(5-benzylsulfonyl-1,3,4-thiadiazol-2-yl)piperazinyl quinolone derivatives
摘要:
A series of N-(5-benzylthio-1,3,4-thiadiazol-2-yl) and N-(5-benzylsulfonyl-1,3,4-thiadiazol-2-yl) derivatives of piperazinyl quinolones was synthesized and evaluated for antibacterial activity against Gram-positive and Gram-negative microorganisms. Some of these derivatives exhibit high activity against Gram-positive bacteria; Staphylococcus aureus and Staphylococcus epidermidis, comparable or more potent than their parent N-piperazinyl quinolones norfloxacin and ciprofloxacin as reference drugs. The SAR of this series indicates that both the structure of the benzyl unit and the S or SO2 linker dramatically impact antibacterial activity. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and in vitro biological evaluation of farnesylthiosalicylic acid derivatives as anti-tumor carcinoma agents
作者:Yong Ling、You An Xiao、Guang Tong Chen、Dong Geng Wang、Yu Qin Li、Xin Yang Wang、Heng Zheng
DOI:10.1016/j.cclet.2012.08.007
日期:2012.10
Abstract Novelfarnesylthiosalicylicacid (FTA) derivatives 5a – m with different substituted 1,3,4-thiadiazoles were synthesized. Compounds 5b , 5c , 5e and 5f displayed anti-tumor activities superior to FTA in most cancer cells tested. Furthermore, 5e induced tumor cell apoptosis, which was accompanied by lower Bcl-2 expression, but with higher Bax and caspase 3 expression activities in cancer cells