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Mass spectrometry of some methyl esters of N ‐4‐pyrimidinylamino acids: Rearrangements of the ions occurring on electron‐impact ionization
Author(s) -
Plaziak Adam S.,
Celewicz Lech,
Spychala Jaroslaw,
Golankiewicz Krzysztof
Publication year - 1990
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210250202
Subject(s) - electron ionization , chemistry , methanol , mass spectrometry , ion , molecule , ionization , medicinal chemistry , methyl radical , mass spectrum , polyatomic ion , organic chemistry , chromatography , radical
The electron‐impact‐induced mass fragmentations of methyl esters of N ‐(1 H ‐2‐oxo‐4‐pyrimidinyl)ainino acids are reported. The loss of a ·COOCH 3 radical and the elimination of a methanol molecule were observed and possible mechanisms of these processes are proposed. The loss of a ·COOH radical and elimination of water were established, which suggests the rearrangement of the investigated esters into isomeric N ‐4‐pyrimidinylamino acids.