Linear dicationic terphenyls and their aza analogues as antiparasitic agents
申请人:Tidwell R. Richard
公开号:US20070232621A1
公开(公告)日:2007-10-04
Novel dicationic terphenyl compounds and their aza analogues. Methods for combating microbial infections with novel dicationic terphenyl compounds and their aza analogues. Processes for synthesizing novel dicationic terphenyl compounds and their aza analogues.
Novel linear triaryl guanidines, N-substituted guanidines and potential prodrugs as antiprotozoal agents
作者:Reem K. Arafa、Mohamed A. Ismail、Manoj Munde、W. David Wilson、Tanja Wenzler、Reto Brun、David W. Boykin
DOI:10.1016/j.ejmech.2008.02.008
日期:2008.12
carbamoyl thioureas 7a,b. Subsequent condensation of 7a,b with various amines in the presence of EDCI provided the carbamoyl N-substituted guanidine intermediates 8a-f which can also be regarded as potentialprodrugs for the guanidino derivatives. Compounds 9c-f were obtained via the base catalyzed decarbamoylation of 8a-f. The DNA binding affinities for the target dicationic bis-guanidines were assessed
合成了一系列针对 DNA 小沟的三芳基胍和 N-取代胍,并对其作为抗原虫剂进行了评估。分析了这些胍的选定氨基甲酸酯前药的口服功效。直链三芳基双胍6a、b由相应的二胺4a、b通过中间体BOC保护的双胍5a、b然后酸催化脱保护制备。N-取代的胍基类似物9c-f通过三步获得,首先使二胺4a、b与异硫氰酸甲酸乙酯反应,得到氨基甲酰基硫脲7a、b。随后7a、b与各种胺在EDCI存在下缩合,得到氨基甲酰基N-取代的胍中间体8a-f,其也可被视为胍基衍生物的潜在前药。化合物9c-f是通过8a-f的碱催化脱氨甲酰化获得的。通过 DeltaT(m) 值评估目标双胍的 DNA 结合亲和力。新化合物的体外抗原虫筛选表明,衍生物6a、9c和9e对罗得西亚布氏锥虫(Tbr)和恶性疟原虫(Pf)具有高至中度活性。虽然前药在抗锥虫 STIB900 小鼠模型中口服给药后并未产生治愈效果,但化合物 8a 和 8c 延长了治疗小鼠的存活时间。