Mass spectra of the picolinyl ester derivatives of some non-methylene-interrupted octadecadienoic acids

Lipids ◽  
1987 ◽  
Vol 22 (9) ◽  
pp. 664-666 ◽  
Author(s):  
W. W. Christie ◽  
E. Y. Brechany ◽  
F. D. Gunstone ◽  
M. S. F. Lie Ken Jie ◽  
R. T. Holman
Keyword(s):  
Mass Spectra ◽  
Picolinyl Ester ◽  
Octadecadienoic Acids ◽  
Derivatives Of

Mass spectra of the picolinyl ester derivatives of some conjugated diacetylenic fatty acids

1992 ◽  
Vol 63 (1-2) ◽  
pp. 65-68 ◽  
Author(s):  
M.S.F. Lie Ken Jie ◽  
Y.K. Cheung ◽  
S.H. Chau ◽  
W.W. Christie ◽  
E.Y. Brechany
Keyword(s):  
Fatty Acids ◽  
Mass Spectra ◽  
Picolinyl Ester ◽  
Derivatives Of

Mass spectra of the picolinyl ester derivatives of some isomeric dimethylene-interrupted octadecadiynoic acids

1988 ◽  
Vol 46 (3) ◽  
pp. 225-229 ◽  
Author(s):  
W.W. Christie ◽  
Elizabeth Y. Brechany ◽  
M.S.F. Lie Ken Jie
Keyword(s):  
Mass Spectra ◽  
Picolinyl Ester ◽  
Derivatives Of

The Mass Spectra of the Picolinyl Ester Derivatives of Malvalic and Sterculic Acid

Lipid / Fett ◽  
1994 ◽  
Vol 96 (10) ◽  
pp. 395-396 ◽  
Author(s):  
V. Spitzer ◽  
F. Marx ◽  
K. Pfeilsticker ◽  
J. G. S. Maia
Keyword(s):  
Mass Spectra ◽  
Sterculic Acid ◽  
Picolinyl Ester ◽  
Derivatives Of

Inductive effect in EI-mass spectra of some 5,6-dihalogenides and 5,6-halohydrins of 5α-cholestan-3β-ol and 3β-acetoxy-5α-cholestane

1982 ◽  
Vol 47 (11) ◽  
pp. 2946-2960 ◽  
Author(s):  
Antonín Trka ◽  
Alexander Kasal
Keyword(s):  
Mass Spectra ◽  
Inductive Effect ◽  
Molecular Ions ◽  
Hydroxyl Group ◽  
Halogen Atoms ◽  
Derivatives Of

Partial EI-mass spectra of 3β-hydroxy- and 3β-acetoxy-5α-cholestanes substituted in positions 5α-, 6β- or 5α,6β- with a hydroxyl group or halogen atoms (fluorine, chlorine, bromine) are presented. The molecular ions of 5α,6β-disubstituted derivatives of 3β-hydroxy-5α-cholestane (or of its 3-acetate) are considerably more stable than the corresponding monosubstituted derivatives if at least one of the pair of the vicinal substituents is chlorine or fluorine. This increase in stability, most striking in 5α- and 6β-fluoro compounds, is explained by the inductive effect.

Mass spectra of dicyanomethylene derivatives of benzophenone analogs

1983 ◽  
Vol 18 (11) ◽  
pp. 457-461 ◽  
Author(s):  
Ching-Bore Wang ◽  
Guor-Rong Her ◽  
J. Throck Watson
Keyword(s):  
Mass Spectra ◽  
Derivatives Of

ω-Aldehydo Sugars Prepared by Ninhydrin Oxidation

1974 ◽  
Vol 52 (23) ◽  
pp. 3905-3912 ◽  
Author(s):  
Alan R. Gibson ◽  
Laurence D. Melton ◽  
Keith N. Slessor
Keyword(s):  
Mass Spectra ◽  
Oxidative Deamination ◽  
Ninhydrin Reaction ◽  
Derivatives Of

The reaction of ninhydrin with 6-amino-6-deoxy-hexopyranosyl sugars has been investigated. 6-Aldehydocyclohexaamylose and 1,2:3,4-di-O-isopropylidene-α-D-galacto-hexodialdo-1,5-pyranose have been prepared by oxidative deamination of 6-amino-deoxycyclohexaamylose and 6-amino-6-deoxy-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose, respectively, using ninhydrin. The preparation of the two aldehydes by the ninhydrin reaction is compared with the method of photolysis of the corresponding azido sugars. The mass spectra of the perdimethylsilyl derivatives of cyclohexaamylose and O-methyl oxime of 6-aldehydocyclohexaamylose have been recorded.

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