Synthesis 2001(9): 1341-1345
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]

Jhillu S. Yadav*, Basi V. Subba Reddy, R. Srinivas, C. Venugopal, T. Ramalingam
Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad-500 007, India
Fax: +91(40)7170512; e-Mail: yadav@iict.ap.nic.in;
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Publikationsverlauf

Received 4 January 2001
Publikationsdatum:
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.

1

IICT Communication No. 4724.

1

IICT Communication No. 4724.