Issue 7, 1986
From the journal:

Journal of the Chemical Society, Perkin Transactions 2

6-Azapurines. Part 1. Determination of the tautomeric populations in 3-methylthioimidazo[4,5-e]-as-triazine by 13C and 15N nuclear magnetic resonance spectroscopy

Jacques Riand,   Marie-Thérèse Chenon,   Cherng-Chyi Tzeng  and  Raymond P. Panzica  

Abstract

3-Methylthioimidazo[4,5-e]-as-triazine (1) was synthesized via ring closure of 5,6-diamino-3-methylthio-as-triazine. By using carbon-13 and nitrogen-15 chemical shifts and three-bond 13C–1H spin–spin coupling constants, the prototropic tautomerism in the imidazole moiety of this 6-azapurine was investigated. The data from these spectral techniques indicated that the 5H-tautomeric form predominates (69%). A critical evaluation of the three methods is provided.

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Article information

DOI
https://doi.org/10.1039/P29860000931
Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1986, 931-936

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6-Azapurines. Part 1. Determination of the tautomeric populations in 3-methylthioimidazo[4,5-e]-as-triazine by 13C and 15N nuclear magnetic resonance spectroscopy

J. Riand, M. Chenon, C. Tzeng and R. P. Panzica, J. Chem. Soc., Perkin Trans. 2, 1986, 931 DOI: 10.1039/P29860000931

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