Mono-, di-, and trisubstituted acyl- and alkylthiophenes. 2. Mass spectrometry
Mono-, di-, and trisubstituted acyl- and alkylthiophenes. 2. Mass spectrometry
复制标题
单、二和三取代的酰基和烷基噻吩。
DOI：
10.1021/je60070a030
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
R. Zaylskie
中科院分区：
文献类型：
--
作者：
J. Pomonis;C. L. Fatland;R. Zaylskie
本文报道了59种单、二、三取代酰基和/或烷基噻吩的质谱，并提出了裂解机理。2-（2-甲基）酰基-5-异烷基-4-甲基噻吩之一的氘标记表明，酰基侧链上的甲基的氢以至少两种方式参与这类化合物的质谱裂解。m/e 84与m/e 85之比，对于碳数为10或更少的2-N-烷基噻吩，其值大于1（5）。2-（甲氧基羰基）-5-正烷基噻吩。四种化合物的显着碎片峰见表III。这些化合物的光谱特征为存在分子离子（10-85%相对强度），CH 3 - 0·（·+-31），CH 3 -0-CO·（·+-59）的损失，以及在m/e 155，3和m/e 156，4处的两个强峰。
The mass spectra of59 mono-, di-, and trisubstituted acyland/or alkylthiophenes are reported and fragmentation mechanisms are proposed. Deuterium labeling of one of the 2-(2-methyl) acyl-5-/i-alkyl-4-methylthlophenes showed that the hydrogens of the methyl group on the acyl side chain are involved in at least two ways in the mass spectral fragmentation of this class of compounds. the m/e 84 to m/e 85 ratio, which had a value greater than unity for 2-n-alkylthiophenes with carbon number 10 or less (5). 2-(Methoxycarbonyl)-5-n-alkylthlophenes. The significant fragment peaks for four compounds are shown in Table III. The spectra of these compounds were characterized by the presence of a molecular ion (10-85% relativeintensity), losses of CH30·(·+—31), CH3-0-C0·(·+—59), and two intense peaks at m/e 155, 3, and m/e 156, 4.