• search hit 8 of 11
Back to Result List

Visualization and quantification of anisotropic effects on the 1H NMR spectra of 1,3-oxazino[4,3- alpha]isoquinolines - indirect estimates of steric compression

  • The anisotropic effects of the phenyl, alpha- and beta-naphthyl moieties in four series of 1,3-oxazino[4,3- a]isoquinolines on the H-1 chemical shifts of the isoquinoline protons were calculated by employing the Nucleus Independent Chemical Shift (NICS) concept and Visualized as anisotropic cones by a through-space NMR shielding grid. The signs and extents of these spatial effects on the H-1 chemical shifts of the isoquinoline protons were compared with the experimental H-1 NMR spectra. The differences between the experimental delta (H-1)/ppm values and the calculated anisotropic effects of the aromatic moieties are discussed in terms of the steric compression that occurs in the Compounds studied.

Export metadata

Additional Services

Share in Twitter Search Google Scholar Statistics
Metadaten
Author:Erich Kleinpeter, István Szatmári, László Lázár, Andreas Koch, Matthias Heydenreich, Ferenc Fülöp
DOI:https://doi.org/10.1016/j.tet.2009.07.038
ISSN:0040-4020
Document Type:Article
Language:English
Year of first Publication:2009
Year of Completion:2009
Release Date:2017/03/25
Source:Tetrahedron. - ISSN 0040-4020. - 65 (2009), 38, S. 8021 - 8027
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert