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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 40, 2010 - Issue 17
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Original Articles

Mild and Efficient Method for Synthesis of Eaminones Using Ytterbium Triflate as Catalyst

, , &
Pages 2506-2512 | Received 13 Apr 2007, Published online: 05 Aug 2010
 

Abstract

A mild and efficient procedure for synthesis of β-enaminones by the condensation of β-dicarbonyl compounds and amines using ytterbium triflate [Yb(OTf)3] as catalyst is described. The catalyst can be easily recovered and reused without loss of activity.

ACKNOWLEDGMENTS

We are grateful to the National Basic Research Program (No. 2003CB114402) and the National Natural Science Foundation of China (Nos. 20476098 and 20676123) for financial support.

Notes

a Reaction conditions: cyclohexane-1,3-dione (5 mmol), aniline (5 mmol), CH3CN as solvent (2 mL), room temperature for 20 min.

b Isolated yields.

c The catalyst was reused for four times.

a Reaction conditions: β-dicarbonyl compound (5 mmol), amine (5 mmol), Yb(OTf)3 (0.10 mmol), CH3CN as solvent (2 mL), room temperature.

b Reaction temperature: 60 °C.

c Isolated yields.

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