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Nuclear magnetic resonance spectroscopic analysis of homoallylic and bis homoallylic substituted methyl fatty ester derivatives
Author(s) -
Lie Ken Jie Marcel S. F.,
Cheng K. L.
Publication year - 1995
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02538263
Subject(s) - chemistry , carbon fibers , chemical shift , nuclear magnetic resonance spectroscopy , resonance (particle physics) , spectroscopy , carbon 13 , medicinal chemistry , stereochemistry , materials science , physics , particle physics , quantum mechanics , composite number , composite material
Abstract Using a combination of selective irradiation 1 H nuclear magnetic resonance experiments and two‐dimensional 1 H− 13 C correlation spectroscopy spectral analysis of homoallylic and bis homoallylic substituted (azido, acetoxy, chloro and oxo) fatty ester derivatives, the carbon shifts of the ethylenic carbon atoms were determined. In the case of methyl 12‐azido‐9 Z ‐octadecenoate (homoallylic), the carbon chemical shifts of the ethylenic C‐9 and C‐10 carbon nuclei are 133.092 and 124.596 ppm, respectively. In methyl 9‐azido‐12 Z ‐octadecenoate ( bis homoallylic), the carbon chemical shift of the ethylenic C‐12 and C‐13 carbon nuclei are 128.118 and 131.243 ppm, respectively.