Similarities and differences in the electron ionization-induced fragmentation of structurally relatedN-alkoxymethyl lactams and sultams
作者:Rafa? Szmigielski、Witold Danikiewicz
DOI:10.1002/jms.790
日期:2005.3
Unimolecular fragmentation patterns of the molecular ions of selected lactams and sultams bearing alkoxymethyl group at the nitrogen atom were studied. The main common fragmentation reaction observed for all compounds studied in this work is the elimination of an aldehyde molecule. This reaction is considered to proceed via two different mechanisms. For lactams, hydrogen rearrangement within an alkoxymethyl
研究了在氮原子上带有烷氧基甲基的部分内酰胺和内酰胺的分子离子的单分子裂解模式。在这项工作中研究的所有化合物中观察到的主要常见裂解反应是消除醛分子。该反应被认为是通过两种不同的机制进行的。对于内酰胺,观察到烷氧基甲基内的氢重排,这导致合适的N-甲基衍生物。对于杜鹃花,通过离子-中性络合物进行的甲基向氮和氧原子的转移占主导。内酰胺特有的另一个重要的断裂通道特征是烷基的丢失。该过程在N-烷氧基甲基部分内发生,产生N-甲酰基内酰胺的合适的质子化离子。