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Synfacts 2010(5): 0617-0617  
DOI: 10.1055/s-0029-1219729
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Palladium Cross-Linked Crystal-Catalyzed Knoevenagel Reaction-Cyclization

Contributor(s): Yasuhiro Uozumi, Yoichi M. A. Yamada, Toshihiro Watanabe
Y. Liu, R. Zhang, C. He*, D. Dang, C. Duan*
Dalian University of Technology, P. R. of China
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Publikationsverlauf

Publikationsdatum:
22. April 2010 (online)

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Significance

Palladium cross-linked triangle crystalline catalyst 4 was prepared by complexation of Pd(NO3)2˙2H2O and ligand 3 followed by crystallization. Knoevenagel condensation-­cyclization of salicylaldehyde derivatives and active methylene compounds was carried out in the presence of catalyst 4 to give the corresponding coumarin and iminochromene derivatives in up to 80% yield.