New route to the 5-((arylthio- and heteroarylthio)methylene)-3-(2,2,2-trifluoroethyl)-furan-2(5H)-ones—Key intermediates in the synthesis of 4-aminoquinoline γ-lactams as potent antimalarial compounds
作者:Oleksandr S. Kanishchev、Adeline Lavoignat、Stéphane Picot、Maurice Médebielle、Jean-Philippe Bouillon
DOI:10.1016/j.bmcl.2013.08.108
日期:2013.11
In this Letter we report on a multi-step synthesis of 5-((arylthio- and heteroarylthio)-methylene)-3-(2,2,2-trifluoroethyl)furan-2(5H)-ones starting from γ-keto thiolester or γ-keto carboxylic acid. The key intermediate γ-lactones were then reacted with 4-aminoquinoline-derived amines via ring opening—ring closure (RORC) process affording the corresponding γ-hydroxy-γ-lactams in moderate to good yields
在这封信中,我们报告了从γ-酮开始的5-((芳硫基和杂芳基硫基)-亚甲基)-3-(2,2,2-三氟乙基)呋喃-2(5 H)-的多步合成硫酯或γ-酮羧酸。然后,通过开环-闭环(RORC)工艺将关键的中间体γ-内酯与4-氨基喹啉衍生的胺反应,以中等至良好的收率得到相应的γ-羟基-γ-内酰胺。对产生的新的4-氨基喹啉γ-内酰胺类药物的体外抗疟活性进行了针对敏感性可变的恶性疟原虫克隆(3D7和W2)的评估,发现其在89–1600 nM范围内具有良好的抵抗指数,并且未显示出抗疟活性。针对浓度高达50μM的人脐静脉内皮细胞(HUVEC)进行体外细胞毒性试验。