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Tautomerism of guanidines studied by N-15 NMR: 2-hydrazono-3-phenylquinazolin-4(3H)-ones and related compounds
Journal article   Peer reviewed

Tautomerism of guanidines studied by N-15 NMR: 2-hydrazono-3-phenylquinazolin-4(3H)-ones and related compounds

Ion Ghiviriga, Bahaa El-Dien M. El-Gendy, Peter J. Steel and Alan R. Katritzky
Organic & biomolecular chemistry, Vol.7(19), pp.4110-4119
01/01/2009
DOI: https://doi.org/10.1039/b907577a
PMID: 19763319

Abstract

Chemistry Chemistry, Organic Physical Sciences Science & Technology
2-Hydrazono-3-phenylquinazolin-4(3H)-ones 11a-i are shown by N-15 NMR to exist in DMSO solution predominantly as the imino tautomers B and not the amino tautomers A. 2-Hydrazino-benzimidazole derivative 12 and 2-hydrazino-4,6-dimethylpyrimidine derivative 13 were found to exist predominantly as the amino tautomers.

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