Oxidation-assisted structural elucidation of compounds containing a tertiary amine side chain using liquid chromatography mass spectrometry
作者:Tamar Shamai Yamin、Hagit Prihed、Avital Shifrovitch、Shai Dagan、Avi Weissberg
DOI:10.1002/jms.4081
日期:2018.6
a 0.1% solution of hydrogen peroxide (including several 16 O/18 O exchange experiments), followed by LC-ESI-MS/MS analysis. The N-oxide counterparts promoted extensive fragmentation with complete coverage of all parts of the molecule, enabling detailed structural elucidation and unambiguous identification of the unoxidized analytes at low nanogram per milliliter levels.
开发了一种新颖的分析技术,用于通过“小瓶中”瞬时氧化和液相色谱质谱法(LC-MS)阐明带有叔胺侧链的化合物的结构。一系列利多卡因同系物和苯并咪唑衍生物在EI-MS和ESI-MS / MS光谱中均具有主要/单个胺代表的碱基峰,并通过0.1%的过氧化氢溶液(包括几种16 O / 18 O)进行氧化交换实验),然后进行LC-ESI-MS / MS分析。N-氧化物对应物促进了分子的所有部分完全覆盖的广泛碎片化,从而能够以低毫微克/毫升的水平进行详细的结构阐明和未氧化分析物的明确鉴定。