- A novel two step synthesis of 3,4-dihydro-4-oxo-5H-pyrano[2,3-d]pyrimidines
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A novel two step synthesis of 5,7-diaryl-3,4-dihydro-4-oxo-5H-pyrano[2,3-d]pyrimidines has been reported based on condensation of 2-thiobarbiturates with chalcones followed by reductive desulfurization of 5,7-diaryl-1,2,3,4-tetrahydro-4-oxo-2-thioxo-5H-py
- Khurana, Jitender M.,Agrawal, Arpita,Kukreja, Gagan
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- 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)
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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 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.
- Ahmed, M. Giasuddin,Romman,Akhter, Kawsari,Halim, Md. Ershad,Rahman, Md. Mahbubur,Ahmed, S. Mosaddeq
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experimental part
p. 946 - 948
(2011/09/12)
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- A NOVEL ONE POT SYNTHESIS OF 1,3,7-TRIARYL-1,2,3,4-TETRAHYDRO-4-OXO-5-PHENYL-2-THIOXO-5H-PYRANOPYRIMIDINES
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A novel one pot synthesis of 1,3,7-triaryl-1,2,3,4-tetrahydro-4-oxo-5-phenyl-2-thioxo-5H-pyranopyrimidines has been described.It utilizes the reaction of different thiobarbituric acids with chalcones.
- Ahluwalia, Vinod Kumar,Aggarwal, Rachna,Alauddin, Mohammad,Gill, Gurpreet,Khanduri, Chandra Has
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p. 129 - 137
(2007/10/02)
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