A Novel Montmorillonite-Enwrapped Scandium as a Heterogeneous Catalyst for Michael Reaction

Treatment of a Na+-exchanged montmorillonite with an aqueous Sc(OTf)3 solution afforded a robust Sc3+ aqua complex enwrapped by the silicate layers of the montmorillonites (Sc3+-mont). The resulting Sc3+-mont showed outstanding catalytic activities for the Michael reaction of 1,3-dicarbonyls under a...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2003-09, Vol.125 (35), p.10486-10487
Main Authors: Kawabata, Tomonori, Mizugaki, Tomoo, Ebitani, Kohki, Kaneda, Kiyotomi
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Organic chemistry
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Summary:Treatment of a Na+-exchanged montmorillonite with an aqueous Sc(OTf)3 solution afforded a robust Sc3+ aqua complex enwrapped by the silicate layers of the montmorillonites (Sc3+-mont). The resulting Sc3+-mont showed outstanding catalytic activities for the Michael reaction of 1,3-dicarbonyls under aqueous and solvent-free conditions. Moreover, this heterogeneous catalyst had an advantage of a strikingly simple workup procedure over the Lewis acids reported to date and was reusable without any appreciable losses in its activity and selectivity.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja0302578