Affordable Access

Publisher Website

Configurational assignment ofvic-amino alcohols from their circular dichroism spectra with dirhodium tetraacetate as an auxiliary chromophore

Authors
Journal
Tetrahedron Asymmetry
0957-4166
Publisher
Elsevier
Publication Date
Volume
10
Issue
14
Identifiers
DOI: 10.1016/s0957-4166(99)00282-7
Keywords
  • Article

Abstract

Abstract The in situ formed complexes of dirhodium(II) tetraacetate with optically active derivatives of the 1,2-amino alcohols ephedrine and adrenaline show circular dichroism spectra suitable for determination of their absolute configuration. According to the M- or P-helicity of the N–C–C–O moiety the investigated compounds generate negative or positive Cotton effects at around 300 and 440 nm, respectively. The third prominent CE of an opposite sign to the first two occurs at ca. 380 nm. It is demonstrated that the in situ method allows fast and easy configurational assignment based on the helicity rule that connects the signs of the Cotton effects at around 300 and 440 nm with the sign of the N–C–C–O torsional angle.

There are no comments yet on this publication. Be the first to share your thoughts.