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One-pot synthesis of pyrano[3,2-c]quinoline-2,5-dione derivatives by Fe3O4@SiO2-SO3H as an efficient and reusable solid acid catalyst

“…Melting points were measured with an electrothermal-9100 apparatus. 1 H and 13 C NMR spectra were recorded on Bruker DRX-400 Avance spectrometer at 400.22 and 100.63 MHz, respectively. Mass spectra were determined …”

“…Constructing various structures to achieve the desired functions is among the main reasons for the widespread use of heterocyclic compounds [1,2]. Nitrogen-containing heterocyclic molecules due to massive presence in the nature with regard to the provision of appropriate biological activity are noteworthy and this has caused scientists to consider to this part of organic chemical science more [3][4][5][6][7][8].…”

Protic ionic liquids: a lucid, rational tool for synthesis of phthalazinediones, quinoxalines and benzopyrans

“…Phthalazine derivatives are an important structural motif, as they have been reported to possess anticonvulsant [20], cardiotonic [21] and vasorelaxant [22] activities. Besides these, they are endowed with anti-inflammatory, analgesic, antihypoxic and antipyretic properties [23]. Pyran framework are usually found in a variety of important natural compounds including carbohydrates, alkaloids, polyether antibiotics, pheromones and iridoids [24].…”

Synthesis, in Silico Molecular Docking Studies and Antibacterial Activity of 4-(4-Hydrazinylbenzyl)-1,3-Oxazolidin-2-One against DNA Gyrase Enzyme

“…Therefore, many researchers have synthesized these compounds as target structures and evaluated their biological activities. Acid hydrazides have frequently been investigated for testing their potentiality as biological properties such as anti-convulsant [9], anti-helmintic [10], anti-tumor [11], anti-leprotic [12], anti-malarial [13], anti-cancer [14], anti-depressant [15], anti-HIV [16],analgesic-anti-inflammatory [17], leishmanicidal [18], vasodilator activities [19].…”