Abstract
A method for the preparation of 2,3,9,10-tetrahydro[1,4]benzodioxino[6,7-h][1,6]naphthyridin-4(1H)-one by cyclization of 2,3-dihydro-9-[(2-carboxyethyl)amino][1,4]dioxino[2,3-g]quinoline-8-carboxylic acid in acetic anhydride in the presence of potassium acetate is described.
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See [1] for communication I.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1663–1665, December, 1975.
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Mikhailitsyn, F.S., Bekhli, A.F. Synthesis of Naphthyridines. Chem Heterocycl Compd 11, 1407–1409 (1975). https://doi.org/10.1007/BF00764537
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DOI: https://doi.org/10.1007/BF00764537