Elucidation of electron ionization mass spectrometric fragmentation pathways of trimethylsilyl ether derivatives of vicinal diols deriving from haplamine by collision-induced dissociation gas chromatography/tandem mass spectrometry and<sup>18</sup>O labelling
作者:Sompheary Ea、Claude Aubert、Jean-François Rontani、Yannick Teral、Mylène Campredon
DOI:10.1002/rcm.6879
日期:2014.5.15
collision-induced dissociation (CID) gas chromatography/tandem mass spectrometry (GC/MS/MS) and (iii) (18)O labelling. RESULTS CID-MS/MS analyses and (18)O labelling demonstrated that EI mass spectral fragmentation of these TMS derivatives involves a transannular cleavage of the pyran ring with formation of a characteristic intense cyclic ion. The study of the mass spectra of TMS derivatives of different
在对天然产物哈普明(9-甲氧基-2,2-二甲基-2,6-二氢吡喃[3,2-c]喹啉-5-酮)进行体外和体内研究后,观察到邻二醇的形成。这些化合物被确定为反式和顺式-3,4-二羟基-9-甲氧基-2,2-二甲基-2,3,4,6-四氢吡喃并[3,2-c]喹啉-5-酮和反式-和顺式3,4,9-三羟基-2,2-二甲基-2,3,4,6-四氢吡喃并[3,2-c]喹啉-5-酮在肿瘤学中具有潜在的意义。因此,必须阐明它们的电子电离质谱(EIMS)裂解途径。方法研究了3,4-二羟基和3,4,9-三羟基七胺的三甲基甲硅烷基(TMS)衍生物的EIMS裂解途径。这些途径已被以下方面证实:(i)与结构同系物(从各种色烯和1,2-二氢萘得到的硅烷化二醇)的EI质谱比较,(ii)低能碰撞诱导解离(CID)气相色谱/串联质谱(GC / MS / MS)和(iii)(18)O标记。结果CID-MS / MS分析和(18)O标