<sup>15</sup>N-NMR. Studies of Aminopyridines, Aminopyrimidines and of Some Diazine N-Oxides
作者:Werner Städeli、Wolfgang Von Philipsborn、Alexander Wick、Ivan Kompiš
DOI:10.1002/hlca.19800630223
日期:1980.3.5
15N-NMR. spectra of mono- and diaminopyridines, and mono-, di- and triaminopyrimidines including trimethoprim and other dihydrofolate reductase inhibitors have been studied in neutral and acidic media. Complete chemical shift assignments are given. Ring-nitrogen shifts are discussed in terms of β-, χ- and δ-substituent effects of amino and alkyl groups. Protonation states in TFA- and FSO3H-solution