Improved one-pot synthetic conditions for synthesis of functionalized fluorescent coumarin-thiophene hybrids: Syntheses, DFT studies, photophysical and thermal properties
作者:Issah Yahaya、Nurgül Seferoğlu、Zeynel Seferoğlu
DOI:10.1016/j.tet.2019.02.034
日期:2019.4
organic medium (DMSO) and partial aqueous binary (DMSO/H2O, v/v, 9:1) medium. Again, the ground and the excited state properties of the umbelliferon-like derivative 3g and its deprotonated form were also studied using the quantum chemical calculations. Finally, the thermal properties of all the target compounds were investigated using TGA in order to test their potency and applicability as optical dyes
Efficient stepwise and one pot three-component synthesis of 2-amino-4-(2-oxo-2H-chromen-3-yl)thiophene-3-carbonitriles
作者:Devulapally Srikrishna、Pramod Kumar Dubey
DOI:10.1016/j.tetlet.2014.10.021
日期:2014.11
conditions have been developed for the synthesis of 2-amino-4-(2-oxo-2H-chromen-3-yl)thiophene-3-carbonitriles (3) starting from 3-acetyl-2H-chromen-2-one (1) through the intermediacy of 2-(1-(2-oxo-2H-chromen-3-yl)ethylidene)malononitrile (2) using the Knoevenagel condensation followed by the Gewald reaction. Alternatively, 3 could also be prepared in a onepot method by treating equimolar amounts of
已经开发出从3-乙酰基-2 H -chromen-2开始合成2-氨基-4-(2-oxo-2 H -chromen-3-yl)噻吩-3-甲腈(3)的环境条件。-使用Knoevenagel缩合,然后进行Gewald反应,通过2-(1-(2-oxo-2 H -chromen-3-yl)亚乙基)丙二腈(2)的中间体(1)。或者,也可以通过处理等摩尔量的1,丙二腈和元素硫,以一锅法制备3。该制备方法的优点是反应条件温和,后处理容易,产率高。