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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, Md Mahbubur
Ahmed, S Mosaddeq
Issue Date: Jul-2011
Publisher: NISCAIR-CSIR, India
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-tetra¬≠hydropyrano[2,3-d]pyrimidin-4-ones, 3d-g has been achieved by the cyclocondensation of barbituric acid or thiobarbituric acid 1 with arylideneacetophenones, 2a-d in glacial acetic acid in the presence of phosphorous pentoxide. The structures of the compounds 3a-g have been determined by their UV, IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses.
Description: 946-948
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.50B(07) [July 2011]

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