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Synfacts 2009(9): 1046-1046  
DOI: 10.1055/s-0029-1217654
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Tandem Condensation Reactions with H-mont-NH2

Contributor(s): Yasuhiro Uozumi, Norihiro Ishiyama
K. Motokura, M. Tada, Y. Iwasawa*
The University of Tokyo, Japan
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Publikationsdatum:
21. August 2009 (online)

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Significance

A bifunctional catalyst of acidic montmorillonite-immobilized primary amines (H-mont-NH2) was prepared by treating H-mont with 3-aminopropyltriethoxysilane in heptane. The reaction of benzaldehyde dimethylacetal (1) with ethyl cyanoacetate (2) was catalyzed by H-mont-NH2 to give the condensation product 3 in 95% yield.