Heterocyclic Analogs of Thioflavones: Synthesis and NMR Spectroscopic Investigations
作者:Ferdinand Fuchs、Gernot Eller、Wolfgang Holzer
DOI:10.3390/molecules14093814
日期:——
The synthesis of several hitherto unknown heterocyclic ring systems derived from thioflavone is described. Coupling of various o-haloheteroarenecarbonyl chlorides with phenylacetylene gives 1-(o-haloheteroaryl)-3-phenylprop-2-yn-1-ones, which were treated with NaSH in refluxing ethanol to yield the corresponding bi- and tricyclic annelated 2-phenylthiopyran-4-ones. Detailed NMR spectroscopic investigations of the ring systems and their precursors are presented.
描述了几种迄今未知的由硫黄黄素衍生的杂环环系的合成。将各种 o-卤代杂环芳基碳酰氯与苯乙炔偶联,产生 1-(o-卤代杂环芳基)-3-苯基丙-2-炔-1-酮,这些产物在乙醇回流中与 NaSH 反应,生成相应的双环和三环联结的 2-苯基硫吡喃-4-酮。详细的 NMR 核磁共振光谱研究报告了这些环系及其前体。