Electron ionization mass spectra of phosphorus-containing heterocycles. III. 1,3,4,2-oxadiazaphosphinane 2-oxides.
Electron ionization mass spectra of phosphorus-containing heterocycles. III. 1,3,4,2-oxadiazaphosphinane 2-oxides.
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含磷杂环的电子电离质谱。
DOI：
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发表时间：
2006
影响因子：
2
通讯作者：
K. Pihlaja
中科院分区：
文献类型：
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作者：
Márta Juhász;Zita Zalán;F. Fülöp;K. Pihlaja
研究了1，3，4，2-氧杂二氮磷杂环己烷2-氧化物中P原子的相对构型（R ~* 或S ~*）以及环的大小、环的稠合、P取代和桥头N原子等对它们断裂的影响。一些断裂类似的3，1，2-oxazaphosphinane 2-氧化物和1，3，2-diazaphosphinane-2-氧化物，但也发现了新的途径，在桥头N原子的电离开始。分子离子和一些碎片离子的相对丰度允许区分顺式-反式差向异构体。n = 2和R=N（CH（2）CH（2）Cl）（2）的化合物，以及在大多数情况下线性或角度异喹啉稠合的异构体，比该系列中的其他化合物产生更多的离子和较低的相对丰度。只有异喹啉衍生物提供的片段产生的离子化的芳香族部分的分子。
The 1,3,4,2-oxadiazaphosphinane 2-oxides differ not only in the relative configuration of the P atom (R* or S*), but also in many other ways such as the ring size, ring fusion, P substitution and bridgehead N atom whose effects on their fragmentations have been studied. Some fragmentations resembled those of 3,1,2-oxazaphosphinane 2-oxides and 1,3,2-diazaphosphinane-2-oxides, but new routes were also found, initiated by ionization at the bridgehead N atom. The relative abundances of the molecular ions and some fragment ions allowed the differentiation of cis-trans epimers. Compounds with n = 2 and R=N(CH(2)CH(2)Cl)(2), and linearly or angularly isoquinoline-fused isomers in most cases, gave more numerous ions with lower relative abundances than the other compounds in this series. Only the isoquinoline derivatives provided fragments resulting from ionization of the aromatic part of the molecule.