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Reactions of 1,3-Dialkyl-5-amino-1,3-dihydro-2H-imidazo-[4,5-b]pyridin-2-ones with acetylacetone and ethyl acetoacetate

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Abstract

1,3-Dialkyl-5-amino-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones reacted with acetylacetone to give the corresponding 4-(1,3-dialkyl-2-oxo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-5-ylamino)pent-3-en-2-ones which underwent intramolecular cyclization to 1,3-dialkyl-5,7-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]-[1,8]naphthyridin-2-ones on heating in polyphosphoric acid or diphenyl ether. Analogous reaction of 1,3-dialkyl-5-amino-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones with ethyl acetoacetate led to the formation of ethyl 3-(1,3-dialkyl-2-oxo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-5-ylamino)but-2-enoates whose cyclization afforded 1,3-dialkyl-8-hydroxy-7-methyl-1,3-dihydro-2H-imidazo[5,4-b][1,8]naphthyridin-2-ones.

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Authors and Affiliations

  1. Litvinenko Institute of Physical Organic and Coal Chemistry, National Academy of Sciences of Ukraine, ul. R. Lyuksemburg 70, Donetsk, 83114, Ukraine

    N. N. Smolyar & D. A. Lomov

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  1. N. N. Smolyar
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  2. D. A. Lomov
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Correspondence to N. N. Smolyar.

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Original Russian Text © N.N. Smolyar, D.A. Lomov, 2009, published in Zhurnal Organicheskoi Khimii, 2009, Vol. 45, No. 3, pp. 431–434.

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Smolyar, N.N., Lomov, D.A. Reactions of 1,3-Dialkyl-5-amino-1,3-dihydro-2H-imidazo-[4,5-b]pyridin-2-ones with acetylacetone and ethyl acetoacetate. Russ J Org Chem 45, 421–424 (2009). https://doi.org/10.1134/S1070428009030129

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  • DOI: https://doi.org/10.1134/S1070428009030129

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