4-Hydroxy-2-quinolones. 97. Simple synthesis of the esters of 4-halo-substituted 2-oxo-1,2-dihydroquinoline-3-carboxylic acids |
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| Authors: | I V Ukrainets L V Sidorenko O V Gorokhova S V Slobodzyan |
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| Institution: | (1) National Pharmaceutical University, Kharkiv, 61002, Ukraine;(2) Ohio Northern University, Ada, Ohio, 45810, USA |
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| Abstract: | Short term treatment of 3-ethoxycarbonyl-4-morpholino-2-oxo-1,2-dihydroquinoline with aqueous solutions of hydrohalogen acids
leads to the formation of the ethyl esters of 4-halo-substituted 2-oxo-1,2-dihydroquinoline-3-carboxylic acids. Hydrolysis
in HF is possible on extended boiling only to the 4-hydroxy derivative.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1022–1025, July, 2006. |
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| Keywords: | 4-amino-2-oxo-1 2-dihydroquinolines enamines ethyl esters of 4-halo-2-oxo-1 2-dihydroquinoline-3-carboxylic acids hydrolysis decarboxylation |
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