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Synfacts 2009(5): 0577-0577  
DOI: 10.1055/s-0029-1216555
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

[3+2] Cycloaddition of Azomethine Imines and Alkynes with Copper(I) Zeolites

Contributor(s): Yasuhiro Uozumi, Go Hamasaka
M. Keller, A. S. S. Sido, P. Pale*, J. Sommer*
Institut de Chimie de Strasbourg, France
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Publication History

Publication Date:
22 April 2009 (online)

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Significance

The catalytic utility of copper(I)-modified USY zeolite (CuI-USY) for the cycloaddition of azomethine imines was described. Thus, [3+2] cycloaddition of azomethine imines 1 and terminal alkynes 2 was carried out with 5 mol% CuI-USY in toluene to give the corresponding N,N-bicyclic pyrazolidinone derivatives 3 in 0-90% isolated yield (16 examples).