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Synlett 2002(10): 1613-1616
DOI: 10.1055/s-2002-34234
DOI: 10.1055/s-2002-34234
LETTER
© Georg Thieme Verlag Stuttgart · New York
Metallo-Enzyme Model in Pure Water: Cyclodextrin-Lanthanide Tris(perfluoroalkanesulfonyl)methide and Bis(perfluoroalkanesulfonyl)amide Complexes
Weitere Informationen
Received
1 July 2002
Publikationsdatum:
23. September 2002 (online)
Publikationsverlauf
Publikationsdatum:
23. September 2002 (online)
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Abstract
Inclusion complexes of cyclodextrin/cyclodextrin copolymer and lanthanide tris(perfluorobutanesulfonyl)methide/bis(perfluorobutanesulfonyl)amide, namely metallo-enzyme model, are efficient and recyclable super Lewis acid catalysts, which can promote Diels-Alder and Mukaiyama-aldol reactions in pure water.
Key words
cyclodextrin - Lewis acids - catalysis - lanthanides - aqueous reactions
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18The full percentage of Ln complex/γ-CDP-Ln complex was found to reach only 60% because of the steric repulsion. Indeed, elemental analysis showed that CDP formed a 59% inclusion complex of Ln(C4-methide)3: Calcd Yb, 3.64%. Found: Yb, 3.61%.