法医学杂志 ›› 2023, Vol. 39 ›› Issue (2): 144-150.DOI: 10.12116/j.issn.1004-5619.2021.311002

• 论著 • 上一篇    下一篇

4-F-α-PVP类似物4-F-3-Methyl-α-PVP盐酸盐的结构解析与表征

王昊阳(), 吴剑, 张倩, 闵新峰, 刘秀艳, 郭寅龙()   

  1. 中国科学院上海有机化学研究所,上海 200032
  • 收稿日期:2021-10-19 发布日期:2023-06-06 出版日期:2023-04-25
  • 通讯作者: 郭寅龙
  • 作者简介:郭寅龙,男,研究员,主要从事质谱学研究;E-mail:ylguo@sioc.ac.cn
    王昊阳(1978—),男,博士,高级工程师,主要从事有机质谱分析研究;E-mail:haoyangwang@sioc.ac.cn
  • 基金资助:
    国家自然科学基金资助项目(21772227);中国科学院关键技术人才项目

Structural Analysis and Characterization of 4-F-α-PVP Analog 4-F-3-Methyl-α- PVP Hydrochloride

Hao-yang WANG(), Jian WU, Qian ZHANG, Xin-feng MIN, Xiu-yan LIU, Yin-long GUO()   

  1. Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
  • Received:2021-10-19 Online:2023-06-06 Published:2023-04-25
  • Contact: Yin-long GUO

摘要:

目的 研究在没有对照品的情况下鉴定检材中1-(4-氟苯基)-2-(N-吡咯烷基)-1-戊酮[1-(4-fluorophenyl)-2-(1-pyrrolidinyl) pentan-1-one,4-F-α-PVP]类似物1-(4-氟-3甲基苯基)-2-(N-吡咯烷基)-1-戊酮[1-(4-fluoro-3-methyl phenyl)-2-(1-pyrrolidinyl) pentan-1-one,4-F-3-Methyl-α-PVP]盐酸盐的方法。 方法 综合利用直接进样电子电离-质谱(electron ionization-mass spectrometry,EI-MS)、GC-MS、电喷雾离子化-高分辨质谱(electrospray ionization-high resolution mass spectrometry,ESI-HRMS)、超高效液相色谱-高分辨串联质谱(ultra-high performance liquid chromatography-high resolution tandem mass spectrometry,UPLC-HRMS/MS)、核磁共振(nuclear magnetic resonance,NMR)、离子色谱和傅里叶变换红外光谱法(Fourier transform infrared spectroscopy,FTIR),实现对检材中未知化合物的结构解析与表征,并对该化合物在EI-MS和UPLC-HRMS/MS两种质谱分析方式下生成碎片离子的裂解机制进行推导。 结果 通过对检材中化合物的直接进样EI-MS、GC-MS、ESI-HRMS和UPLC-HRMS/MS分析,推断出未知化合物为4-F-α-PVP的结构类似物,可能苯环中多了1个甲基。根据核磁共振氢谱(1H-nuclear magnetic resonance,1H-NMR)、核磁共振碳谱(13C-nuclear magnetic resonance,13C-NMR)等分析结果,进一步证明了甲基的位置在苯环的3-位。由于1H-NMR分析中实际氢的个数比4-F-3-Methyl-α-PVP中性分子多1个,推断该化合物以盐形式存在。离子色谱法分析结果表明该化合物含氯离子(含量11.14%~11.16%),结合FTIR对主要官能团信息的结构分析,最终确定该未知化合物为4-F-3-Methyl-α-PVP盐酸盐。 结论 建立了综合利用EI-MS、GC-MS、ESI-HRMS、UPLC-HRMS/MS、NMR、离子色谱和FTIR鉴定检材中4-F-3-Methyl-α- PVP盐酸盐的方法,将有助于法庭科学实验室在案件中鉴定该物质或其他具有类似结构的化合物。

关键词: 法医学, 毒物分析, 新精神活性物质, 高分辨质谱法, 核磁共振, 1-(4-氟-3甲基苯基)-2-(N-吡咯烷基)-1-戊酮盐酸盐, 结构解析

Abstract:

Objective To identify 1-(4-fluorophenyl)-2-(1-pyrrolidinyl) pentan-1-one (4-F-α-PVP) analog 1-(4-fluoro-3-methyl phenyl)-2-(1-pyrrolidinyl) pentan-1-one (4-F-3-Methyl-α-PVP) hydrochloride without reference substance. Methods The direct-injection electron ionization-mass spectrometry (EI-MS), GC-MS, electrospray ionization-high resolution mass spectrometry (ESI-HRMS), ultra-high performance liquid chromatography-high resolution tandem mass spectrometry (UPLC-HRMS/MS), nuclear magnetic resonance (NMR), ion chromatography and Fourier transform infrared spectroscopy (FTIR) were integrated utilized to achieve the structural analysis and characterization of the unknown compound in the sample, and the cleavage mechanism of the fragment ions was deduced by EI-MS and UPLC-HRMS/MS. Results By analyzing the direct-injection EI-MS, GC-MS, ESI-HRMS and UPLC-HRMS/MS of the compound in the samples, it was concluded that the unknown compound was a structural analog of 4-F-α-PVP, possibly with one more methyl group in the benzene ring. According to the analysis results of 1H-NMR and 13C-NMR, it was further proved that the methyl group is located at the 3-position of the benzene ring. Since the actual number of hydrogen in 1H-NMR analysis was one more than 4-F-3-Methyl-α-PVP neutral molecule, it was inferred that the compound existed in the form of salt. Ion chromatography analysis results showed that the compound contained chlorine anion (content 11.14%-11.16%), with the structural analysis of main functional group information by FTIR, the unknown compound was finally determined to be 4-F-3-Methyl-α-PVP hydrochloride. Conclusion A comprehensive method using EI-MS, GC-MS, ESI-HRMS, UPLC-HRMS/MS, NMR, ion chromatography and FTIR to identify 4-F-3-Methyl-α-PVP hydrochloride in samples is established, which will be helpful for the forensic science laboratory to identify this compound or other analog compounds.

Key words: forensic medicine, toxicological analysis, new psychoactive substance, high resolution mass spectrometry, nuclear magnetic resonance, 4-F-3-Methyl-α-PVP hydrochloride, structural analysis

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