ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The proton magnetic resonance spectra of 20 pteridines, i.e. 2-amino-4-oxo-3,4-dihydropteridine and 19 derivatives, have been measured at 100 Mc/s and 60 Mc/s in CF3COOH under standardized conditions as the mono-cations. The chemical shifts of the vinyl-, methyl- and NH2-protons are tabulated, and some typical spectra are illustrated. The influence of the substrate concentration and of solvent effects upon the NH-signals have been studied. Protonation always takes place at N(1) or N(3), and an attempt is made to correlate δ(NH2) and pKa values.
Zusätzliches Material:
14 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19660490419
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