Tautomerism and electron impact mass spectra of pyrimidin-4(3H)- and -4(1H)-ones |
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Authors: | Kalevi Pihlaja Pentti Oksman Gza Stjer Gbor Bernth |
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Institution: | Kalevi Pihlaja,Pentti Oksman,Géza Stájer,Gábor Bernáth |
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Abstract: | A mass spectrometric identification and differentiation of pyrimidin-4(3H)- and -4(1H)-ones was carried out. N-Substitution at position 1 or 3 made the distinction of the two sets of compounds very easy because of their characteristic fragmentation pathways. Most interesting were the spectra of the N-unsubstituted derivatives, which illustrated a predominance of the two possible NH tautomers in relation to the 4-hydroxy structure. |
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