Solvent-free microwave-assisted synthesis of 1<i>H</i>-indole-2, 3-dione derivatives
作者:Ashish Kumar Singh、Sudhish Kumar Shukla、Ishtiaque Ahamad、M. A. Quraishi
DOI:10.1002/jhet.131
日期:2009.5
Microwave-assistedsynthesis has been found to increase both reaction rates and yields via more efficient heating compared with standard thermal conduction. Dry reaction of isatins with thiosemicarbazide and their thiosemicarbazone with secondary amine on acid—washed K10 in microwave oven afforded isatin-3-thiosemicarbazones and N-Mannich bases in reasonably good yield. The chemical structures were
已经发现,与标准的热传导相比,微波辅助合成通过更有效的加热可以提高反应速率和产率。Isatin与thiosemicarbazide以及它们的thiosemicarbazone与仲胺在酸上的干反应-在微波炉中洗涤K10,可以得到相当好的产率的isatin-3-thiosemicarbazones和N-Mannich碱。化学结构通过1 H NMR,IR光谱数据和元素分析得到确认。J.杂环化学。,46,571(2009)。
Microwave-Assisted Synthesis of Some Novel Thiazolidinone and Thiohydantoin Derivatives of Isatins
作者:Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.1080/10426500903567554
日期:2010.10.28
A simple, rapid, and efficient method for the synthesis of some new thiazolidinone and thiohydantoin derivatives of isatins along with some Mannich bases has been achieved in excellent yield from indole-2,3-dione-3-thiosemicarbazone employing microwave irradiation.
Design, synthesis and anti-plasmodial evaluation in vitro of new 4-aminoquinoline isatin derivatives
作者:Idan Chiyanzu、Cailean Clarkson、Peter J. Smith、Julie Lehman、Jiri Gut、Philip J. Rosenthal、Kelly Chibale
DOI:10.1016/j.bmc.2005.02.037
日期:2005.5
A new class of 4-aminoquinoline derivatives based on the natural product isatin scaffold were designed and synthesized for biological evaluation against three strains of the malaria parasite Plasmodium falciparum. These derivatives showed anti-plasmodial IC50 values in the ranges of 1.3-0.079 and 2.0-0.050 mu M against a chloroquine-sensitive (D10) and two resistant (K1 and W2) strains of P. falciparum, respectively. In order to determine potential targets for this class of compounds in P. falciparum, selected compounds were also tested against the parasitic cysteine protease falcipain-2. In terms of further development of this class of isatin derivatives, two of the compounds based on a flexible alkyl chain linker and a thiosemicarbazone moiety warrant further investigation as potential anti-plasmodial leads. These two derivatives showed good in vitro activity against K1 and W2 with IC50 values of 51 and 54 nM, respectively, while retaining potency against the D10 strain with IC50 values of 79 and 95 nM, respectively. Generally speaking, the inhibitory potency of all compounds in the series against the parasites did not strongly correlate with inhibitory potency against falcipain-2 for selected compounds tested, which at best was weak to moderate, suggesting other mechanisms of inhibition may also be involved or compounds may be selectively taken up by Plasmodium falciparum. (c) 2005 Elsevier Ltd. All rights reserved.