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Published June 1, 1982 | public
Journal Article

Studies of the tautomerism of purine and the protonation of purine, and its 7- and 9-methyl derivatives, by nitrogen-15 nuclear magnetic resonance spectroscopy

Abstract

The nitrogen-15 NMR shifts of purine and its 7- and 9-methyl derivatives were measured at the natural-abundance level as a function of pH. The results made it possible for both the sites and magnitudes of protonation of purine and its derivatives to be determined. A semiquantitative determination was made of the position of the N7H-N9H tautomeric equilibria of purine in both water and dimethyl sulfoxide.

Additional Information

© 1982 American Chemical Society. Received May 22, 1981. Supported by the National Science Foundation and by the Public Health Service, Research Grant No. GM-11072 from the Division of General Medical Sciences.

Additional details

Created:
August 19, 2023
Modified:
October 24, 2023