Synthesis and experimental study of through-space hydrogen–fluorine and carbon–fluorine spin–spin coupling in 4,5-substituted 1-acetyl-8-fluoronaphthalenes
作者:Saul Jaime-Figueroa、Lilia J. Kurz、Yanzhou Liu、Raymundo Cruz
DOI:10.1016/s1386-1425(99)00215-2
日期:2000.5
19F) of a complete series of 4,5-substituted 1-acetyl-8-fluoronaphthalenes are reported. This data revealed a 6J(H,F) and a 5J(C,F) through space coupling between the fluorine and the methyl on the acetyl group (1H and 13C). The magnitude of this coupling constant changes depending on the nature of the substituent at C-4, the internuclear distance, and the solvent.
报道了完整的4,5-取代的1-乙酰基-8-氟萘系列化合物的合成和NMR研究(1H,13C和19F)。该数据通过氟和乙酰基上的甲基(1H和13C)之间的空间偶合揭示了6J(H,F)和5J(C,F)。该偶联常数的大小根据C-4处的取代基的性质,核间距离和溶剂而变化。