Electron ionization mass spectra of some substituted stereoisomeric 1,6,7,11b-tetrahydro-2h,4H[1,3]oxazino[4,3-a]-isoquinolines and 1,6,7,11b-tetrahydro-2H[1,3]oxazino [4,3-a]-isoquinolin-4-ones1
Electron ionization mass spectra of some substituted stereoisomeric 1,6,7,11b-tetrahydro-2h,4H[1,3]oxazino[4,3-a]-isoquinolines and 1,6,7,11b-tetrahydro-2H[1,3]oxazino [4,3-a]-isoquinolin-4-ones1
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一些取代立体异构体 1,6,7,11b-四氢-2h,4H[1,3]恶嗪基[4,3-a]-异喹啉和 1,6,7,11b-四氢-2H[1] 的电子电离质谱
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
G. Bernáth
中科院分区：
文献类型：
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作者：
Karoliina Joutsiniemi;P. Vainiotalo;L. Lázár;F. Fülöp;G. Bernáth
在电子轰击电离下，记录了常见取代恶嗪并[4，3-a]异喹啉、2种异喹啉并[2，1-c][1，3]苯并恶嗪和7种取代恶嗪并[4，3-a]异喹啉-4-酮的质谱。通过亚稳离子分析、碰撞诱导解离和精确质量测量来检查碎片化。恶嗪并异喹啉和恶嗪并异喹啉-4-酮的行为相似，尽管在片段化，特别是在峰强度上有一些差异。最重要的断裂开始与恶唑环的开放。取代基影响同分异构体的裂解，而立体异构体的光谱是相同的。这两个isoquinobenzoxazines显着不同的其他化合物在其断裂行为;额外的苯环提示全新的碎片独特的这种结构。
The mass spectra often substituted oxazino[4,3-a]isoquinolines, two isoquino[2,1-c][1,3]benzoxazines and seven substituted oxazino[4,3-a]isoquinolin-4-ones were recorded under electron impact ionization. Fragmentations were examined by metastable ion analysis, collision induced dissociation and exact mass measurement. The oxazinoisoquinolines and oxazinoisoquinolin-4-ones behaved similarly, although there were a few differences in the fragmentation and especially in the peak intensities. The most important fragmentation began with the opening of the oxazole ring. The substituents affected the fragmentation of the isomeric compounds, whereas the spectra of the stereoisomeric compounds were identical. The two isoquinobenzoxazines differed noticeably from the other compounds in their fragmentation behaviour; the additional phenyl ring prompted entirely new fragmentations unique to this structure.