Abstract

MORALES-RIOS, Martha S. et al. Ion trap tandem mass spectrometry of C- and N-methyl, benzyl, and prenyl substituted 2-oxopyrrolidinoindolines. Rev. latinoam. quím [online]. 2012, vol.40, n.3, pp.130-139. ISSN 0370-5943.

The electron impact induced fragmentations of C- and N-methyl, benzyl, and prenyl substituted 2-oxopyrrolidinoindolines were studied using an ion trap mass spectrometer (IT-MS). Correlations of characteristic fragment ions of the 2-oxopyrrolidinoindoline skeleton with specific modifications of the substituents around it were supported by stepwise fragmentation MS/MS analysis and accurate mass measurements. The MS³ spectra evidenced the neutral loss of methyl- or benzylisocyanate from the 2-oxopyrrolidine ring, which would result in a rearranged stable quinolinium ion.

Keywords : 2-oxopyrrolidinoindolines; mass spectra; EI-ion trap; MS/MS analysis; quinolinium ion; accurate mass.

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