作者:Danuta Branowska、Abdelbasset A. Farahat、Arvind Kumar、Tanja Wenzler、Reto Brun、Yang Liu、W. David Wilson、David W. Boykin
DOI:10.1016/j.bmc.2010.03.058
日期:2010.5
Seven novel diamidino 2,5-bis(aryl)thiazoles (5a–g) were synthesized and evaluated against Trypanosoma brucei rhodensiense (T. b. r.) and Plasmodium falciparum (P. f.). The diamidines were obtained directly from the corresponding bis-nitriles (4a–g) by the action of lithium bis(trimethylsilyl)amide. The bis-nitriles 4a–f were synthesized in four steps starting with the Stille coupling of 2-tributyltinthiazole
合成了七种新型二脒基 2,5-双(芳基)噻唑 ( 5a – g ),并针对布氏罗登斯锥虫( T. b. r .) 和恶性疟原虫( P. f. ) 进行了评估。通过双(三甲基甲硅烷基)氨基锂的作用,直接从相应的双腈(4a – g )获得二脒。双腈4a – f 的合成分四步进行,首先将 2-三丁基锡噻唑与适当的氰基芳基卤进行 Stille 偶联。通过钯促进混合锡-甲硅烷基试剂2-三甲基甲硅烷基-5-三甲基锡噻唑与2-溴-5-氰基吡啶的偶联获得双腈5g 。通过羟胺与双腈反应得到偕胺肟潜在前药6a – e , 6g 。偕胺肟的O-甲基化得到相应的N-甲氧基脒7a – c、7e、7g。正如 Δ T m测量所反映的那样,二脒显示出很强的 DNA 结合亲和力。四种二脒5a、5b、5d和5e在体外对P. f 具有高度活性。IC 50值在 1.1 至 2.5 nM 之间。相同的四种二脒显示针对 T. b. 的