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Synlett 2000; 2000(3): 406-408
DOI: 10.1055/s-2000-6547
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Mannich-Type Reaction Catalyzed by Dicyanoketene Ethylene Acetal and the Related Polymer-Supported π-Acid: Aldimine-Selective Reactions in the Coexistence of Aldehydes

Nobuyuki Tanaka* , Yukio Masaki
  • *Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan; Fax +81-58-2 37-59 79; E-mail: masaki@gifu-pu.ac.jp
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Publication Date:
31 December 2000 (online)

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Mannich-type reaction of aldimines and enolsilyl ethers proceeded with excellent aldimine-selectivity in the coexistence of aldehydes by means of dicyanoketene ethylene acetal (DCKEA) and the related polymer-supported dicyanoketene acetal as a recyclable π-acid catalyst.

polymeric π-acid catalyst - Mannich type reaction - enolsilyl ethers - aldimine-selectivity - recyclable catalyst