Synthesis of ring-substituted 4-aminoquinolines and evaluation of their antimalarial activities
摘要:
A simple two-step synthesis method was used to make 51 B-ring-substituted 4-hydroxyquinolines allowing analysis of the effect of ring substitutions on inhibition of growth of chloroquine sensitive and resistant strains of Plasmodium falciparum, the dominant cause of malaria morbidity. Substituted quinoline rings other than the 7-chloroquinoline ring found in chloroquine were found to have significant activity against the drug-resistant strain of P. falciparum W2. (C) 2004 Elsevier Ltd. All rights reserved.
开发了一系列新的喹啉基苯磺酰胺( QBS )作为潜在的碳酸酐酶抑制剂(CAI)。目标QBS CAI 基于 4-苯胺基喹啉支架,其中主要磺酰胺官能团作为锌锚定基团嫁接在苯胺基部分的 C4 处( QBS 13a – c );此后,磺酰胺基团转换为邻位和间位,得到区域异构体9a – d和11a – g 。此外,采用了一种连接体延伸方法,其中氨基连接体被酰肼连接体取代以提供QBS 16 。所有描述的QBS均已合成并研究了它们对h CA I、II、IX 和 XII 的 CA 抑制作用。一般来说,对磺酰胺衍生物13a – c对癌症相关异构体h CA IX( K I s 分别 = 25.8、5.5 和 18.6 nM)和h CA XII( K I s = 9.8、13.2)表现出最佳的抑制活性。和 8.7 nM),此外,间磺酰胺衍生物11c还具有出色的h CA IX 抑制活性( K I = 8.4 nM
A derivative, which is useful as a ret kinase inhibitor is described herein. The described invention also includes methods of using the same in the treatment of diseases mediated by inappropriate ret kinase activity.
Direct C-3-Alkenylation of Quinolones via Palladium-Catalyzed CH Functionalization
作者:Mingzong Li、Liangxi Li、Haibo Ge
DOI:10.1002/adsc.201000364
日期:2010.10.4
An unprecedented C-3-alkenylation of quinolones was reported through palladium-catalyzed CH functionalization with 1% catalyst loading. This method provides an efficient route to a variety of new quinolone derivatives.
Gas-phase pyrolysis of aminomethylene Meldrum’s acidderivatives gave quinolinones and/or amines depending on the -nature of arylamino moiety. Effect of substituent on reaction rate and nature of pyrolysis products supports the suggested intramolecular nucleophilic substitution reaction via initially formed keteneamine intermediate.