Maher Hadir M, Awad Tamer, Clark C Randall
Department of Pharmaceutical Analytical Chemistry, Alexandria University, Alexandria 21521, Egypt.
Forensic Sci Int. 2009 Jul 1;188(1-3):31-9. doi: 10.1016/j.forsciint.2009.03.009. Epub 2009 Apr 15.
Gas chromatography with infrared detection (GC-IRD) provides direct confirmatory data for the identification of the psychoactive designer drug 3-trifluoromethylphenylpiperazine (3-TFMPP) from the regioisomeric 2- and 4-trifluoromethylphenylpiperazines. These three regioisomeric substances are well resolved by GC and the vapor phase infrared spectra clearly differentiate among the three trifluoromethylphenyl substitution patterns. However, the mass spectra for the three regioisomeric 2-, 3-, and 4-trifluoromethylphenylpiperazines are identical and do not provide structural confirmation for one of the three isomers to the exclusion of the other two compounds. Perfluoroacylation of the secondary amine nitrogen for each of the three regioisomers was conducted in an effort to individualize their mass spectra. The resulting derivatives were resolved by GC and their mass spectra showed some differences in relative abundance of fragment ions without the appearance of any unique fragments for specific confirmation of structure.
带有红外检测的气相色谱法（GC-IRD）为从区域异构体2-和4-三氟甲基苯基哌嗪中鉴定精神活性设计药物3-三氟甲基苯基哌嗪（3-TFMPP）提供了直接的确证数据。这三种区域异构体物质通过气相色谱法得到了很好的分离，并且气相红外光谱能清晰地区分这三种三氟甲基苯基取代模式。然而，三种区域异构体2-、3-和4-三氟甲基苯基哌嗪的质谱图是相同的，无法为三种异构体中的一种提供结构确证以排除其他两种化合物。对这三种区域异构体的仲胺氮进行全氟酰化，试图使它们的质谱图具有个性。所得衍生物通过气相色谱法进行分离，其质谱图显示出碎片离子相对丰度存在一些差异，但没有出现任何用于特定结构确证的独特碎片。
