Mass spectrometric fragmentation of 1,8-bis[4-substituted-(oxazolin-2-yl)] anthracenes: Ring-contraction rearrangement of oxazoline ring under electron-impact ionization conditions

被引：0

作者：

Jiao Peng ^{[1
]}

Ma Lin-ge ^{[1
]}

Zhang Qi-han ^{[1
]}

Xu Jia-xi ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Key Lab Bioorgan Chem & Mol Engn, Minist Educ, Beijing 100871, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2006年 / 22卷 / 06期

基金：

中国国家自然科学基金;

关键词：

bis-oxhzoline; EI-MS; fragmentation; ring contraction;

D O I：

10.1016/S1005-9040(06)60204-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The mass spectrometric fragmentation of 1,8-bis[4-substituted(oxazobn-2-yl)] anthracenes(AnBOXes) was investigated by using mass-analyzed ion kinetic energy spectrometry under electron-impact ionization conditions. All the compounds could undergo a ring contraction by the loss of an RCH = CH2 molecule to form 1-oxazirinyl-8-(oxazolin-2-yl) anthracene ions, which could further lose an R radical, followed by the loss of oxazoline. These ions could also eliminate an R radical and subsequently undergo ring-contraction rearrangements to lose a CHCH2O fragment and an epoxide molecule, respectively. The ions that are formed could further lose CHCH2O and CH, = CH fragments. Several ring-contraction rearrangements of the oxazoline ring were observed under electron-impact ionization conditions.

引用

页码：753 / 755

页数：3

共 14 条

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