13C NMR of coumarins. V—3-prenylated coumarins
作者:F. A. Macias、R. Hernández-Galán、G. M. Massanet、F. Rodriguezluis、M. Vasquez、J. Salvá
DOI:10.1002/mrc.1260280814
日期:1990.8
13C NMR data of nineteen coumarins, twelve of which bear a prenyl (isoprenoid) side-chain at C-3, are reported and compared with those of the C-3 unsubstituted compounds. Unlike the linear isomers, no γ-effect is observed in the corresponding angular derivatives; this is proposed as spectroscopic criterion for distinguishing between these isomers.
报告了 19 种香豆素的 13C NMR 数据,并将其与 C-3 未取代化合物的 13C NMR 数据进行了比较。与线性异构体不同的是,在相应的角状衍生物中没有观察到 γ 效应;建议将其作为区分这些异构体的光谱标准。