ChemInform Abstract: Pyrazolo(3,4‐b)pyridines: Syntheses, Reactions, and NMR Spectra.

Abstract

188ChemInform Abstract With a view to their potential activities as inhibitors of xanthine oxidases, approximately 70 simple substituted representatives of pyrazolo (3,4-b)pyridine are prepared by various methods; the main strategies involve anellation of a pyrazole ring onto a suitable substituted pyridine such as (I) to give the title compounds (IV) and anellation of a pyridine ring onto a pyrazole such as (VII) to give the pyrazolopyridines (V) or (IX).