Electrospray ionization-tandem mass spectrometric study of fused nitrogen-containing ring systems
JOURNAL OF MASS SPECTROMETRY(2022)
摘要
Four fused nitrogen-containing ring systems were investigated by electrospray ionization-tandem mass spectrometry: Pyridazino-indoles, pyridazino-quinolines, a pyrimido-quinoline derivative and pyrimido-cinnolines. Fragmentation patterns of these compounds are discussed and compared. Several characteristic cross-ring fragments were formed mainly on the pyridazine and pyrimidine rings of the ring systems. The connected Cl, NO2, Me, Ph and more extended heterocyclic substituents influenced the fragmentation.
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关键词
fragmentation, fused N-heterocycles, pyridazino-indoles, pyridazino-quinolines, pyrimido-cinnolines, pyrimido-quinolines, tandem mass spectrometry
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