A novel sulfonic acid functionalized ionic liquid catalyzed multicomponent synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives in water
作者:Zhiwei Chen、Qiang Zhu、Weike Su
DOI:10.1016/j.tetlet.2011.03.059
日期:2011.5
Three-component reactions of 4-hydroxycoumarin, aldehydes, and cyclic 1,3-dicarbonyl compounds were prompted by novel sulfonic acid functionalized ionic liquids 1,3-dimethyl-2-oxo-1,3-bis(4-sulfobutyl)imidazolidine-1,3-diium hydrogen sulfate ([DMDBSI]center dot 2HSO(4)) in water at reflux temperature to provide a novel series of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives for the first time in high yields. (C) 2011 Elsevier Ltd. All rights reserved.
Emtiazi, Hamideh; Amrollahi, Mohammad Ali, South African Journal of Chemistry, 2014, vol. 67, p. 175 - 179
作者:Emtiazi, Hamideh、Amrollahi, Mohammad Ali
DOI:——
日期:——
Hetero-annulated coumarins as new AChE/BuChE inhibitors: synthesis and biological evaluation
A series of chromene-fused coumarins known as 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-diones 4a–o were synthesized through one-pot reaction of appropriate benzaldehydes, dimedone, and 4-hydroxycoumarin in the presence of nano-silica sulfuric acid under solvent-free condition in good yields. The in vitro anticholinesterase assay revealed that the 3-hydroxyphenyl analog 4e showed the highest