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
摘要 通过碳负离子诱导的 6-芳基-2H-吡喃-2-环转化,描述了一种无金属、超声辅助、荧光 N-Boc 保护的 1,2,3,4-四氢喹啉 9a-p 的快速合成。 7 与 3-氧代哌啶-1-羧酸叔丁酯 8 在碱性条件下。以高产率分离反应产物9a-p。我们的合成方法可以灵活地引入吸电子和给电子基团。所有合成的 1,2,3,4-四氢喹啉 9a-p 均在 422-470 nm 范围内显示蓝色荧光。基于化合物 9a-p 的光学行为,我们计算了斯托克斯位移、量子产率和光学带隙,它们受环中取代基的影响很大。