Polyfunctional pyridines from nitroacetamidine and β-diketones. A useful synthesis of substituted imidazo[4,5-b]pyridines and related compounds

Article abstract of DOI:10.1002/jhet.5570320349

Nitroacetamidine undergoes a useful cyclocondensation with β-diketones to produce substituted 2-amino-3-nitropyridines. Use of an acylpyruvate generates hitherto unreported 2-amino-3-nitropyridine-4-carboxylates. These may be converted easily to functionalized imidazo[4,5-b]pyridines and oxazolo[5,4-b]pyridines.