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NMR study of 5-substituted pyrazolo[3,4-c]pyridine derivatives

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NMR study of 5-substituted pyrazolo[3,4-c]pyridine derivatives
Tsikouris, O. Bartl, T. Toušek, J. Lougiakis, N. Tite, T. Marakos, P. Pouli, N. Mikros, E. Marek, R.
scientific_publication_article
Επιστημονική δημοσίευση - Άρθρο Περιοδικού (EL)
Scientific publication - Journal Article (EN)
2008
Substituted pyrazolopyridines are potent inhibitors of phosphodiesterases and cyclin-dependent kinases. In this study, NMR was used to investigate the potential NI-H and N2-H tautomerism of 5-substituted pyrazolo[3,4-c]pyridine derivatives. Six compounds were fully characterized by using 1H, 13C, and 15N chemical shifts and indirect 1H-13C and 1H-15N coupling constants. The 1H NMR spectra were measured over a broad range of temperatures. All of the compounds were shown to exist predominantly in the NI-H tautomeric form. Complementary quantum-chemical calculations of the chemical shieldings and indirect spin-spin couplings support the structural conclusions drawn. Copyright © 2008 John Wiley & Sons, Ltd. (EN)
English
Ερευνητικό υλικό ΕΚΠΑ
https://creativecommons.org/licenses/by-nc/4.0/
University of Athens
Pergamos Digital Library
Journal Article



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