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

Autor:	N. N. Smolyar, D. A. Lomov
Rok vydání:	2009
Předmět:	chemistry.chemical_compound chemistry Acetylacetone Ethyl acetoacetate Organic Chemistry Diphenyl ether Intramolecular cyclization Organic chemistry Medicinal chemistry
Zdroj:	Russian Journal of Organic Chemistry. 45:421-424
ISSN:	1608-3393 1070-4280
DOI:	10.1134/s1070428009030129
Popis:	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.
Databáze:	OpenAIRE
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