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Synthesis 2001(9): 1341-1345
DOI: 10.1055/s-2001-15229
DOI: 10.1055/s-2001-15229
PAPER
© Georg Thieme Verlag Stuttgart · New York
LiClO4-Catalyzed One-Pot Synthesis of Dihydropyrimidinones: An Improved Protocol for Biginelli Reaction [1]
Further Information
Received
4 January 2001
Publication Date:
29 September 2004 (online)
Publication History
Publication Date:
29 September 2004 (online)
Abstract
Lithium perchlorate efficiently catalyzes the three-component condensation reaction of aldehyde, β-keto ester and urea in refluxing acetonitrile to afford the corresponding dihydropyrimidinones in high yields under neutral conditions. LiOTf is also found to be an efficient catalyst for the synthesis of dihydropyrimidinones from aldehyde, β-keto ester and urea.
Keywords
Biginelli reaction - lithium perchlorate - lithium triflate - dihydropyrimidinones
IICT Communication No. 4724.
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References
IICT Communication No. 4724.