Mass spectrometry of organic compounds of the group V Elements: VI—A new type of amine fragmentation under electron impact
摘要:
AbstractA new type of amine fragmentation under electron impact is elucidated for proline, sarcosine and aspartic acid derivatives and aminomethylphosphines of the general formula R2NCH2X. Ordinary α‐cleavage affording the \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm R}_2 \mathop {\rm N}\limits^{\rm + } {\rm = CH}_{\rm 2} $\end{document} ion is suppressed by elimination of a neutral HX particle and [M ‐ HX]+ ion formation, or M‐HX neutral particle ejection and generation of an [HX]+ ion from [M]+˙. Such fragmentation is ensured by the presence of an α‐heteroatom (N, O, P, S) in one substituent (X) and a CO2R type delocalizing group in the α‐position of the other substituent (R2N).
Scandium-catalysed intermolecular hydroaminoalkylation of olefins with aliphatic tertiary amines
作者:Adi E. Nako、Juzo Oyamada、Masayoshi Nishiura、Zhaomin Hou
DOI:10.1039/c6sc02129h
日期:——
scandium trialkyl complex in combination with a borate compound served as an excellent catalyst for the C–H addition of aliphatic tertiary amines to olefins. This highly regiospecific, 100% atom efficient C–H bond alkylation reaction was applicable to a wide variety of tertiary amines and olefins, including functionalised styrenes and unactivated α-olefins. This work represents the firstexample of rare-earth
Mass spectrometry of organic compounds of the group V Elements: VI—A new type of amine fragmentation under electron impact
作者:R. G. Kostyanovsky、V. N. Voznesensky、G. K. Kadorkina、Yu. I. El'natanov
DOI:10.1002/oms.1210150804
日期:1980.8
AbstractA new type of amine fragmentation under electron impact is elucidated for proline, sarcosine and aspartic acid derivatives and aminomethylphosphines of the general formula R2NCH2X. Ordinary α‐cleavage affording the \documentclassarticle}\pagestyleempty}\begindocument}$ \rm R}_2 \mathop \rm N}\limits^\rm + } \rm = CH}_\rm 2} $\enddocument} ion is suppressed by elimination of a neutral HX particle and [M ‐ HX]+ ion formation, or M‐HX neutral particle ejection and generation of an [HX]+ ion from [M]+˙. Such fragmentation is ensured by the presence of an α‐heteroatom (N, O, P, S) in one substituent (X) and a CO2R type delocalizing group in the α‐position of the other substituent (R2N).