Dimethyloxazoline derivatives

Dobson, G. and Christie, W.W. (1996) Structural analysis of fatty acids by mass spectrometry of picolinyl esters and dimethyloxazoline derivatives. TrAC Trends Anal. Chem., 15 (3), 130-7. 

Mossoba, M.M., M.P. Yuracwecz, J.A.G. Roach, R.E. McDonald, B.D. FUckinger, and E.G. Perkins, Analysis of Cyclic Fatty Acid Monomer 2-Atkenyl-4,4-dimethyloxazoline Derivatives by Gas Chromatography-Matrix Isolation-Fourier Transform Infrared Spectroscopy, J. Agric. Food Chem. 44 3193-3196 (1996). 

Garrido, J,L., and I. Medina, One-Step Conversion of Fatty Acids into Their 2-Alkenyl-4,4-dimethyloxazoline Derivatives Directly from Total Lipids, J. Chromatogr. A 673 101-105 (1994). 

Alkenyl-4,4-dimethyloxazoline derivatives formed by condensation of long-chain unsaturated fatty acids with 2-amino-2-methylpropanol are useful for the location of double bonds [188],... 

Figure 5.5 Mass spectrum (70 eV) of a dimethyloxazoline derivative of 13-cyclopent-2-enyl-tridec-4-enoate. M = molecular ion. Redrawn from Zhang, J. Y. Wang, H. Y., Yu, Q. T. et al. The structures of cyclopentenyl fatty acids in the seed oils of Flacourtiaceae species by GC-MS of their 4,4-dimethyloxazo-...

Figure 5.8 Mass spectra (70 eV) of dimethyloxazoline derivatives of A, 9,10-methyleneocta-dec-9-enoic (sterculic) acid B, 2-hydroxy-sterculic acid. Redrawn from Spitzer, V., GC-MS characterization (chemical ionization and electron impact modes) of the methyl esters and oxazoline derivatives of cyclopropenoid fatty acids, J. Am. Oil Chem. Soc., 68(12), 963-9,1991.

Figure 5.9 Matrix-isolation Fourier transform infra-red spectra of dimethyloxazoline derivatives of A, 9-(2 -but-c/j-l-enyl-cyclopentenyl)nonanoic acid B, 9-(2 -but-rra j-l-enyl-cyclo-pentenyl)nonanoic acid C, 9-(2 -prop-/ra/w-l-enyl-cyclohex-cw-4-enyl)nonanoate from heated linseed oil. Redrawn from Mossoba, M. M., Yuracwecz, M. P., Roach, J. A. G. et aL, Analysis of cyclic fatty acid monomer 2-alkenyl-4,4-dimethyloxazoline derivatives by gas chromatogra-phy-Fourier transform infra-red spectroscopy, J. Agric. Food Chem., 44, 3193-6, 1996.

Figure 5.15 Mass spectra (70 eV) of dimethyloxazoline derivatives of 9-(2 -propyl-cyclohex-cw-4-enyl)non-rra 5-8-enoate derived from a-linolenic acid in heated linseed oil A, before, B, after deuteration. Redrawn from Dobson, G., Christie, W. W., Brechany, E. Y. et al. Silver ion chromatography and gas chromatography-mass spectrometry in the structural analysis of cyclic dienoic acids formed in frying oils, Chem. Phys. Lipids, 75, 171-82, 1995.

Mossoba, M. M., Yuracwecz, M. P., Roach, J. A. G. et al, (1996a) Analysis of cyclic fatty acid monomer 2-alkenyl-4,4-dimethyloxazoline derivatives by gas chromatography-matrix isola-tion-Fourier transform infrared spectroscopy. J. Agric. Food Chem., 44, 3193-6. 

Soybean Oil by Silver Ion-Impregnated HPLC and Gas Chromatography-Ion Impacted Mass Spectrometry of Their 4,4-Dimethyloxazoline Derivatives, 50 ... 

Spitzer, V. (1997) Structure Analysis of Fatty Acids by Gas Chromatography - Low Resolution Electron Impact Mass Spectrometry of Their 4,4-Dimethyloxazoline Derivatives—A Review, Prog. Lipid Res. 35, 387 08. 

Yu, Q.T., Liu, B.N., Zhang, J.Y., and Huang, Z.H. (1988) Location of Methyl Branching in Fatty Acids Fatty Acids in Uropygial Secretion of Shanghai Duck by GC-MS of 4,4-Dimethyloxazoline Derivatives, Lipids 23, 804—814. 

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