title: GC-MS evaluation of a series of acylated derivatives of 3,4-methylenedioxymethamphetamine.
abstract: A series of acylated derivatives of 3,4-methylenedioxy-methamphetamine (3,4-MDMA) are prepared and evaluated in gas chromatography-mass spectrometry (GC-MS) studies. The perfluoroalkyl amides of 3,4-MDMA show the lowest GC retention, while the aromatic amides such as the benzamide show the greatest retention on the dimethylpolysiloxane stationary phase (Rtx-1). The mass spectral properties of the acetyl, propionyl, and butyryl derivatives all show a base peak at m/z 58 which is the base peak for the underivatized 3,4-MDMA. All acylated derivatives provide mass spectral information (m/z 162) to identify the three-carbon side chain for 3,4-MDMA. The perfluoroalkyl amides yield several unique mass spectral fragments for specific identification of 3,4-MDMA. MS fragmentation pathways are illustrated and validated using analogous deuterated derivatives. A combination of excellent chromatographic properties and unique mass spectral fragments allows the perfluoroalkyl amides to provide maximum specific structural information in the GC-MS analysis of 3,4-MDMA.
authors.affiliation: Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria 21521, Egypt.
authors.forename: Tarek
authors.initials: T
authors.lastname: Belal
authors.forename: Tamer
authors.initials: T
authors.lastname: Awad
authors.forename: C Randall
authors.initials: CR
authors.lastname: Clark
authors.forename: Jack
authors.initials: J
authors.lastname: DeRuiter
mesh_terms: D000215:Acylation; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D018817:N-Methyl-3,4-methylenedioxyamphetamine / Q000737:chemistry*
chemical_list: D018817:N-Methyl-3,4-methylenedioxyamphetamine