.omega.-[(4,6-Diphenyl-2-pyridyl)oxy]alkanoic acid derivatives: a new family of potent and orally active LTB4 antagonists
摘要:
A series of omega-[(4,6-diphenyl-2-pyridyl)oxy]alkanoic acid derivatives was prepared which inhibited the binding of leukotriene B4 to its receptors on guinea pig spleen membranes and on human polymorphonuclear leukocytes (PMNs) and selectively antagonized the LTB4-induced elastase release in human PMNs. On the basis of these three screens, a structure-activity relationship was investigated. Alpha-Substitution on the carboxylic acid side chain led to only small changes in the binding affinities but greatly enhanced the LTB4 antagonist activity. Substitution on the phenyl rings was also evaluated. The terminal carboxylic acid function can be replaced by a tetrazole ring without loss in activity. The beat in vitro LTB4 antagonists of this series were investigated in vivo in the inhibition of LTB4-induced leukopenia in rabbits. Compound 9b (RP69698) displayed potent LTB4 antagonist activity, after oral administration, with an ED50 value of 6.7 mg/kg.
Synthesis and cdc25B inhibitory activity evaluation of chalcones
作者:Fei Zhao、Qing-Jie Zhao、Jing-Xia Zhao、Da-Zhi Zhang、Qiu-Ye Wu、Yong-Sheng Jin
DOI:10.1007/s10600-013-0563-7
日期:2013.5
A library of sixty-five chalcones was prepared for screening against the protein phosphatase, cdc25B. From this library, thirteen compounds were found having good inhibitory activity. Two compounds have excellent activity and can be used for the design of more potent antiproliferative agents.
The synthesis and synergistic antifungal effects of chalcones against drug resistant Candida albicans
作者:Yuan-Hua Wang、Huai-Huai Dong、Fei Zhao、Jie Wang、Fang Yan、Yuan-Ying Jiang、Yong-Sheng Jin
DOI:10.1016/j.bmcl.2016.05.013
日期:2016.7
toxicity synergistic antifungal compounds, 24 derivatives of chalcone were synthesized to restore the effectiveness of fluconazoleagainst fluconazole-resistant Candida albicans. The minimal inhibitory concentration (MIC80) and the fractional inhibitory concentration index (FICI) of the antifungalsynergistfluconazole were measured against fluconazole-resistant Candida albicans. This was done via methods
SUBSTITUTED BICYCLIC BIS-ARYL COMPOUNDS EXHIBITING SELECTIVE LEUKOTRIENE B 4? ANTAGONIST ACTIVITY, THEIR PREPARATION AND USE IN PHARMACEUTICAL COMPOSITIONS