Mass Spectral Fragmentation Modes of Some New Pyrimidinethiones, Thiazolo[3,2-a]Pyrimidines and Bis-Pyrimidines

摘要

Mass fragmentation pathways of a number of pyrimidinethiones, thiazolo[3,2-a] pyrimidines and bis-pyrimidines were investigated by electron impact mass spectrometry (EI-MS). The molecular ion peaks M+2 and M⁺ were recorded at different intensities. Characteristic fragment ions were formed by successive loss of simple functional groups followed by decomposition of the heterocycles connected to pyrimidine ring.