Indole and Benzimidazole Bichalcophenes: Synthesis, DNA Binding and Antiparasitic Activity
作者:Abdelbasset A. Farahat、Mohamed A. Ismail、Arvind Kumar、Tanja Wenzler、Reto Brun、Ananya Paul、W. David Wilson、David W. Boykin
DOI:10.1016/j.ejmech.2017.10.056
日期:2018.1
with the DNA minorgroove and generally show excellent in vitro antitrypanosomal activity. The diamidino-indole derivatives also showed excellent in vitro antimalarial activity while their benzimidazole counterparts were generally less active. Compound 7c was highly active in vivo and cured all mice infected with Trypanosoma brucei rhodesiense, a model that mimics the acute stage of African sleeping sickness
制备了一系列新的吲哚和苯并咪唑二氟噻吩二am衍生物,以研究它们对引起非洲昏睡病和疟疾的热带寄生虫的抗菌活性。合成目标二am所需的二氰基吲哚是通过Stille偶联反应获得的,而双氰基苯并咪唑中间体是通过不同醛与4-氰基1,2-二氨基苯胺的缩合/环化反应制得的。使用不同的am合成方法,即双三甲基甲硅烷基氨基锂(LiN [Si(CH3)3 ] 2)和Pinner方法制备二am。新的二am类化合物的两种类型(吲哚和苯并咪唑)衍生物都与DNA小沟紧密结合,通常显示出优异的体外抗锥虫活性。二mid基吲哚衍生物还显示出优异的体外抗疟活性,而它们的苯并咪唑对应物通常活性较低。化合物7c在体内具有很高的活性,可治愈所有感染了布氏锥虫的小鼠,该小鼠模仿非洲昏睡病的急性期,剂量低至4×5 mg / kg ip,因此7c在体内比在体内更有效喷他idine。
Dicationic phenyl-2,2′-bichalcophenes and analogues as antiprotozoal agents
作者:Mohamed A. Ismail、Serry A. El Bialy、Reto Brun、Tanja Wenzler、Rupesh Nanjunda、W. David Wilson、David W. Boykin
DOI:10.1016/j.bmc.2010.11.047
日期:2011.1
A series of phenyl-2,2'-bichalcophene diamidines 1a-h were synthesized from the corresponding dinitriles either via a direct reaction with LiN(TMS)(2), followed by deprotection with ethanolic HCl or through the bis-O-acetoxyamidoxime followed by hydrogenation in acetic acid and EtOH over Pd-C. These diamidines show a wide range of DNA affinities as judged from their Delta T-m values which are remarkably sensitive to replacement of a furan unit with a thiophene one. These differences are explained in terms of the effect of subtle changes in geometry of the diamidines on binding efficacy. Five of the eight compounds were highly active (below 6 nM IC50) in vitro against Trypanosoma brucei rhodesiense (T. b. r.) and four gave IC(50)values less than 7 nM against Plasmodium falciparum (P. f.). Only one of the compounds was as effective as reference compounds in the T. b. r. mouse model for the acute phase of African trypanosomiasis. (C) 2010 Elsevier Ltd. All rights reserved.
Ismail, Mohamed A., Journal of Chemical Research, 2006, # 11, p. 733 - 737