149744-50-3Relevant academic research and scientific papers
PMR SPECTRA AND CONFORMATIONS OF BENZODIOXANE AND BENZODIOXEPAN DERIVATIVES OF FLAVANONE AND ISOFLAVANONE
Khilya, V.P.,Litkei, D.,Kovtun, E.N.,Al'Budi, Kh.,Kornilov, M.Yu.,Turov, A.V.
, p. 595 - 603 (2007/10/02)
PMR spectra were obtained for benzodioxane and benzodioxepan derivatives of chromanone.The heterocyclic substituent in 2-substituted chromanones (flavanone analogs) has equatorial orientation, while the heterocyclic substituent in 3-substituted chromanones (isoflavanone analogs) has axial orientation.These conclusions are based on analysis of the coupling constans, aromatic solvent-induced shifts, and shifts induced by lanthanide shift reagents.
