14N and 13C NMR of tautomeric systems of hydroxy-pyridines
- 1 January 1976
- journal article
- Published by Elsevier BV in Tetrahedron
- Vol. 32 (9), 1065-1067
- https://doi.org/10.1016/s0040-4020(01)83237-3
Abstract
14 N NMR is shown to be an efficient method of investigation of the tautomeric equilibria in hydroxy-and related substituted pyridines. Large relative 14 N chemical shifts within tautomeric pairs estimated from N-Me and O-Me derivatives make possible quantitative determinations of the equilibria. Qualitative conclusions may be drawn from 14 N line widths as well as from 13 C and proton chemical shifts.Keywords
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