N, N′, N″-trisubstituted guanidines: Synthesis, characterization and evaluation of their leishmanicidal activity
作者:Rafael Dias do Espírito Santo、Ángela María Arenas Velásquez、Luana Vitorino Gushiken Passianoto、Alex Arbey Lopera Sepulveda、Leandro da Costa Clementino、Renata Pires Assis、Amanda Martins Baviera、Predrag Kalaba、Fábio Neves dos Santos、Marcos Nogueira Éberlin、Gil Valdo José da Silva、Martin Zehl、Gert Lubec、Márcia Aparecida Silva Graminha、Eduardo René Pérez González
DOI:10.1016/j.ejmech.2019.03.032
日期:2019.6
efficacy, the latter mainly due to the emergence of drug-resistant parasites, which makes discovery of novel, safe, and efficacious antileishmanial drugs mandatory. The present work reports the synthesis, characterization by ESI-MS, 1H and 13C NMR, and FTIR techniques as well as in vitro and in vivo evaluation of leishmanicidal activity of guanidines derivatives presenting lower toxicity. Among ten investigated
利什曼病是一组从该属引起的原生动物寄生虫疾病利什曼原虫。如果不及时治疗,每年估计有130万新病例,每年的死亡率为20,000-30,000。当前可用的化学治疗药物具有高毒性和低功效,后者主要归因于耐药性寄生虫的出现,这使得发现新颖,安全和有效的抗衰老药物成为必不可少的。本工作报告了ESI-MS,1 H和13 C NMR和FTIR技术以及体外和体内的合成,表征评估具有较低毒性的胍衍生物的杀菌活性。在十种被研究的化合物中,所有都是含有苯甲酰基,苄基和取代的苯基部分的胍,LQOF-G2(IC 50-ama 5.6μM ; SI = 131.8)和LQOF-G7(IC 50-ama 7.1μM ; SI = 87.1)对马氏乳杆菌胞内鞭毛虫最有活性,根据它们的选择性指数,对宿主细胞显示出低细胞毒性。最有希望的化合物LQOF-G2在体内得到了进一步评估并能以0.25 mg / kg /天的剂量减少足
The Preparation and Hydrolysis of Mono- and Disubstituted Benzoylthioureas<sup>1</sup>
作者:Irwin B. Douglass、F. B. Dains
DOI:10.1021/ja01321a061
日期:1934.6
Iron Trichloride and Air Mediated Guanylation of Acylthioureas. An Ecological Route to Acylguanidines: Scope and Mechanistic Insights
作者:Simon Pape、Pablo Wessig、Heiko Brunner
DOI:10.1021/acs.joc.6b00600
日期:2016.6.3
Recently we introduced iron trichloride as an environmentally benign and cost-efficient reagent for the synthesis of N-benzoylguanidines. This highly attractive synthetic approach grants access to a broad spectrum of N-benzoylguanidines under mild conditions in short reaction times. In this work we present an extended scope of Our methodology along with the results obtained from mechanistic studies via in situ IR spectroscopy in combination with LC (liquid chromatography)-MS analyses. On the basis of these new mechanistic insights we were able to optimize the synthetic protocol and to develop an alternative mechanistic proposal. In this context the symbiotic roles of iron trithloride and oxygen in the guanylation process are highlighted.
Novel Synthesis of 1-Aroyl-3-aryl-4-substituted Imidazole-2-thiones
[GRAPHICS]An efficient route to 1-aroyl-3-aryl-4-substituted imidazole-2-thiones (2, 4-6) has been developed. The methodology involves the cyclization of 1-aroyl-3-arylthioureas with a variety of carbonyl compounds bearing a-H in the presence of bromine and triethylamine.
Synergism of fused bicyclic 2-aminothiazolyl compounds with polymyxin B against <i>Klebsiella pneumoniae</i>
A series of fused bicyclic 2-aminothiazolyl compounds were synthesized and evaluated for their synergistic effects with polymyxin B (PB) against Klebsiella pneumoniae (SIPI-KPN-1712).