A smooth synthesis of benzo[c][1,5]naphthyridine-6-carbonitrile and benzo[h][1,6]naphthyridine-5-carbonitrile, starting from benzonaphthyridine N-oxides, is achieved by treatment with trimethylsilane carbonitrile (Me3SiCN) in CH2Cl2 at 0–5 °C. The resulting nitriles are then hydrolyzed to the corresponding acids by boiling in aqueous alkali.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, 406–409, March, 2011.
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Bachowska, B. A convenient route to cyano derivatives of benzonaphthyridines. Chem Heterocycl Comp 47, 332–335 (2011). https://doi.org/10.1007/s10593-011-0761-9
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DOI: https://doi.org/10.1007/s10593-011-0761-9