V. Pomel et al., SYNTHESIS OF NEW PYRIDINE INTERMEDIATES AS PRECURSORS FOR THE ELABORATION OF STREPTONIGRIN ANALOGS BY THE METALATION-CROSS-COUPLING STRATEGY, Journal of heterocyclic chemistry, 33(6), 1996, pp. 1995-2005
Starting from available 2-amino-6-chloro-3-nitropyridine, synthesis of
3-amino-6-pyridinecarboxylic acid derivatives precursor for pyridine
ring C of streptonigrin analogues is described.