2H-Pyronederivatives were synthesized through the reaction of aryl acetyl compounds with ketene dithioacetals in the presence of sodium hydroxide, and they showed very strong fluorescence in the solid state. The light-emitting region of these 2H-pyrones is 447-630 nm in the solid states.
Synthesis, spectral characterization and photophysical studies of tetrahydroquinolines
作者:C. Subashini、L. John Kennedy、Fateh V. Singh
DOI:10.1016/j.molstruc.2020.129365
日期:2021.2
Abstract A metal-free, ultrasound-assisted, fast synthesis of fluorescent N-Boc-protected 1,2,3,4–tetrahydroquinolines 9a-p is described through carbanion-induced ring transformation of 6-aryl-2H-pyran-2-ones 7 with tert‑butyl 3-oxopiperidine-1-carboxylate 8 under basic condition. The reaction products 9a-p were isolated in high yields. Our synthetic approach is flexible for introducing electron-withdrawing
Synthesis of thiophenes and pyranone fused thiophenes by base induced inter and intramolecular C–S and C–C bond formation: a non-catalytic approach
作者:Pushyamitra Mishra、Hardesh K. Maurya、Brijesh Kumar、Vishnu K. Tandon、Vishnu Ji Ram
DOI:10.1016/j.tetlet.2011.12.066
日期:2012.2
An efficient and concise one pot synthesis of highly functionalized thiophenes and pyranone fused thiophenes has been delineated through base induced ring transformation of suitably functionalized 2H-pyran-2-ones by ethyl thioglycolate by inter and intramolecular C–S and C–Cbondformation.
高碱化噻吩和吡喃酮稠合噻吩的一种高效,简洁的一锅合成方法,是通过硫代乙醇酸乙酯通过分子间和分子内C–S和C–C键的形成,对适当官能化的2 H -pyran-2-ones进行碱诱导的环转化来描述的。
A dual colorimetric-ratiometric fluorescent probe NAP-3 for selective detection and imaging of endogenous labile iron(<scp>iii</scp>) pools in C. elegans
作者:Atul Goel、Shahida Umar、Pankaj Nag、Ashutosh Sharma、Lalit Kumar、Shamsuzzama Shamsuzzama、Zakir Hossain、Jiaur R. Gayen、Aamir Nazir
DOI:10.1039/c4cc09798j
日期:——
The first dual colorimetric and ratiometric fluorescent probe NAP-3 for selective visualization of labile iron(iii) pools in Caenorhabditis elegans is reported.
A simple yet convenient nucleophile-induced synthetic route for the construction of thermally stable fluorescent active functionalized stilbenes has been delineated. The nucleophile-induced base encouraged synthetic protocol was performed under mild conditions without harming the environment and products were achieved in good yields. The synthesized stilbenes showed amazing emission properties and