Ionic Liquid as Catalyst and Reaction Medium: A Simple and Efficient Procedure for Paal–Knorr Furan Synthesis
作者:Gangqiang Wang、Zhi Guan、Rongchang Tang、Yanhong He
DOI:10.1080/00397910902978049
日期:2010.1.14
The ionicliquid 1-butyl-3-methyl-imidazolium hydrogen sulfate, [bmim]HSO4, efficiently catalyzes Paal–Knorr furan synthesis without any organic solvent. A wide range of aliphatic and aromatic 1,4-diketones easily undergo condensations to form furan derivatives, providing a general and convenient procedure. The Paal–Knorr reaction of ester-substituted 1,4-diketones is first reported. The ionic liquid
ethyl)-6-[4-(substituted pyrrol-1-yl)phenyl]-4,5-dihydro-3(2H)-pyridazinone, derivatives and 2-nonsubstituted/2-methyl- 4-[4-(substituted pyrrol-1-yl)phenyl]-1(2H)-phthalazinone derivatives were synthesised by reacting hexan-2,5-dion or 1-aryl-3-carbethoxypent-1,4-diones with corresponding 2-substituted/nonsubstituted 6-(4'-aminophenyl)-4,5-dihydro-3(2H)-pyridazinone or 2-substituted/nonsubstitute
Synthesis and biological evaluation of panaxadiol ester derivatives possessing pyrazole and pyrrole moiety as HIF-1α inibitors
作者:Ye-Fang Lu、Chuang Liu、Juan Ma、Hu-Ri Piao、Changhao Zhang、Xuejun Jin、Cheng-Hua Jin
DOI:10.1016/j.fitote.2024.106052
日期:2024.9
hypoxia response in tumor cells. Therefore, its inhibitors have become one of the targets for the treatment of a variety of cancers. Two series of panaxadiol (PD) ester derivatives containing pyrazole () and pyrrole () moiety were synthesized and their HIF-1α inhibitory activities were evaluated. Among all the target compouds, compounds , , and (IC = 8.7010.44 μM) showed better HIF-1α inhibitory activity
A set of nine new arylpyrrolyl derivatives of 7-chloro-4-aminoquinoline, characterized by different substituents on the phenyl ring or different distance between the pyrrolic nitrogen and the 4-aminoquinoline, has been synthesized and tested for their activity against D-10 (CQ-S) and W-2 (CQ-R) strains of Plasmodium falciparum. All compounds exhibited activity against the CQ-S strain in the low nM range, comparable to that of chloroquine. Some of them were also highly active against the CQ-R strain and not toxic against normal cells. The antimalarial activity of this new class of compounds seems to be related to the inhibition of heme detoxification process of parasites, as in the case of chloroquine. (c) 2010 Elsevier Ltd. All rights reserved.