Abstract
The structures of the products obtained on ozonation of methyl oleate have been re-examined. The assignments for the six isomeric ozonides of methyl oleate have been made by1H and13C nuclear magnetic resonance (NMR), which were consistent with the retention times observed in high-performance liquid chromatography; the assignments were confirmed by mass and infrared spectroscopy. Two triplets for the ozonide ring protons of thecis andtrans isomers in the normal (MOO1) and the two cross ozonides (MOO1 and MOO3) can be resolved by 400 MHz NMR. For MOO1 and MOO3, where the two ring carbons are equivalent, two peaks for the ring carbons of each cross ozonides are resolved in the13C NMR spectra, one for thecis and one for thetrans isomer. For MOO2, four peaks for the ring carbons are resolved in the13C NMR spectra, two for thecis and two for thetrans isomer.
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Abbreviations
- CI:
-
chemical ionization
- FT-IR:
-
Fourier transform infrared
- HPLC:
-
high-performance liquid chromatography
- IR:
-
infrared
- MOO1:
-
one of the cross ozonides from methyl oleate (3,5-dioctyl-1,2,4-trioxolane)
- MOO2:
-
the normal ozonide from methyl oberte (methyl 5-octyl-1,2,4-trioxolane-3-(8′ octanoate))
- MOO3:
-
the second cross ezonide from methyl oleate (dimethyl 1,2,4-trioxolane-3,5-(8′,8′-dioctanoate))
- MOO1:
-
MOO2, and MOO3 refer to bothcis andtrans isomers (see Scheme 1 for structures of the six isomeric ozenides)
- NMR:
-
nuclear magnetic resonance
- TLC:
-
thin-layer chromatography
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Wu, M., Church, D.F., Mahier, T.J. et al. Separation and spectral data of the six isomeric ozonides from methyl oleate. Lipids 27, 129–135 (1992). https://doi.org/10.1007/BF02535812
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DOI: https://doi.org/10.1007/BF02535812