NDLI: One-step methodology for the synthesis of FA picolinyl esters from intact lipids

Content Provider	Springer Nature Link
Author	Destaillats, Frédéric Angers, Paul
Copyright Year	2002
Abstract	Picolinyl derivatives are used for structural determination of FA by GC-MS. Although they provide reliable diagnostic fragments, the usual multistep methodologies applied for their preparation require TAG hydrolysis or acid chloride formation prior to picolinyl synthesis. These reaction conditions may result in the presence of artifact molecules in the samples and thus compromise analytical quality and accuracy. To address these problems, a rapid, simple and quantitative methodology for the synthesis of FA picolinyl esters from intact lipids was developed. It involves their transesterification under basecatalyzed conditions using 3-potassiooxamethylpyridine in methylene chloride. The catalyst was prepared by proton exchange between potassium tert-butoxide and anhydrous 3-hydroxymethylpyridine. Mild reaction conditions allowed complete derivatization of TAG and phospholipids in 2 min at room temperature, and of FAME in 15 min at 45°C. The proposed procedure, which can be used on a routine basis, was applied to Ipomoae imperialis seed lipids and used to confirm occurrence of γ-linoleic acid at a level of 0.9%.
Starting Page	253
Ending Page	256
Page Count	4
File Format	PDF
ISSN	0003021X
Journal	Journal of the American Oil Chemists' Society
Volume Number	79
Issue Number	3
e-ISSN	15589331
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkoxide fatty acid picolinyl ester gas-liquid chromatography Ipomoae seed oil γ-linolenic acid mass spectrometry mass spectroscopy potassium tert-butoxide transesterification Chemistry/Food Science Analytical Chemistry Biotechnology Industrial Chemistry/Chemical Engineering Biomaterials Agriculture
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering

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