Synthesis and tandem mass spectrometry of chlorinated triacylglycerols.
Chem Phys Lipids
; 174: 55-63, 2013 Sep.
Article
en En
| MEDLINE
| ID: mdl-23872189
ABSTRACT
The incorporation of 9,10-dichlorooctadecanoyl groups using enzyme-catalyzed acylation and protecting group strategies yielded specific regioisomers of di- and tetrachlorinated triacylglycerols. Hexachloro- and hexabromotriacylglycerols were synthesized by addition of chlorine or bromine to tri-(cis-9-octadecenoyl)glycerol. Upon electrospray ionization and tandem mass spectrometry, the sodium adduct ions of all compounds containing a 9,10-dichlorooctadecanoyl group readily lost two molecules of HCl when subjected to collision-induced dissociation. A mechanism describing sequential HCl losses and the formation of a conjugated diene is proposed for the loss of both vicinal chlorine atoms from an alkyl chain. This characteristic fragmentation behavior and the availability of characterized standards will facilitate the development of quantitative analytical methods for the determination of chlorinated triacylglycerols in lipid mixtures isolated from marine and other biological sources.
Palabras clave
1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; 4-dimethylaminopyridine; CID; DMAP; EDCl; ESI; Fragmentation mechanism; GC; LC-MS/MS; Mass spectrometry; Organochlorine; Triacylglycerol; collision-induced dissociation; electrospray ionization; gas chromatography; liquid chromatographytandem mass spectrometry
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Triglicéridos
Idioma:
En
Revista:
Chem Phys Lipids
Año:
2013
Tipo del documento:
Article