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NMR Properties of 5,7-Disubstituted Derivatives of 1,2,4-Triazolo[1,5a] pyrimidines

✍ Scribed by A. Grodzicki; E. Szłyk; L. Pazderski; A. Goliński; J. G. Haasnoot

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
247 KB
Volume
34
Category
Article
ISSN
0749-1581

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✦ Synopsis

Some 5,7-disubstituted derivatives of 1,2, 4-triatolo[l ,%]pyrimidines with methyl, tert-butyl, phenyl and trifluoromethyl substituents were studied. The syntheses and 'H, l3C* 1 6 N and lgF N M R and mass spectra are reported. Natural abundance 1 6 N N M R spectra and signal assignments, based on chemical shifts and selective decoupling experiments, are discussed. The influence of substituents on the chemical shifts of 'H, 13C, "N and "F signals was considered. '6N-'sF and "N-'H spin-spin couplings in relation to the structural changes caused by the substituents examined were characterized.

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