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Title: A one-step synthesis of 5,7-Diaryl-1,5-dihydro (or 1,2,3,5-tetrahydro)-pyrano[2,3-d]pyrimidin-2,4-diones (or 2-thioxo-4-ones)
Authors: Ahmed, M. Giasuddin
Romman, U. K. R.
Akhter, Kawsari
Halim, Md. Ershad
Rahman, M. M.
Ahmed, S. Mosaddeq
Keywords: Pyranopyrimidin, arylideneacetophenone, barbituric acid
Issue Date: Jul-2011
Publisher: NISCAIR, India
Series/Report no.: 50(7);Page 946-948
Abstract: A one-step synthesis of 5,7-diaryl-1,5-dihydro-pyrano[2,3-d]pyrimidin-2,4-diones, 3a-c and 5,7-diaryl-2-thioxo-1,2,3,5-tetrahydropyrano[2,3-d]pyrimidin-4-ones, 3d-g was achieved by the cyclocondensation of barbituric acid or thiobarbituric acid (1) with arylideneacetophenones, 2a-d in glacial acetic acid in presence of phosphorous pentoxide. The structures of the compounds 3a-g were determined by their UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses.
ISSN: 0376 – 4699
Appears in Collections:Publication: Journal

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