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Mass spectrometry of N-(Pyrimidin-2-yl)amino acids and their methyl esters

✍ Scribed by Adam S. Plaziak; Jaroslaw Spychala; Krzysztof Golankiewicz

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 258 KB
Volume: 26
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210261212

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✦ Synopsis

Abstract

N(Pyrimidin‐2‐yl)‐glycine, ‐alanine and ‐phenylalanine (1‐3) and their methyl esters (4‐6) were investigated using electron impact (EI) mass Spectrometry. The results showed that EI‐induced decomposition occurs on the carboxylic group or involves the loss of R~2~OH. In contrast to earlier investigations on N‐(pyrimidin‐4‐yl)amino acids, elimination of water (in 1‐3) or methanol (in 4‐6) was found to be of EI‐induced nature. The loss of 'COOH from M^+^ of ester 4 suggests the occurrence of a skeletal rearrangement leading to the isomeric N‐methylamino acid.

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