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Polymer-supported Ti and Al Lewis acids as catalysts in Diels-Alder reactions

✍ Scribed by S.V. Luis; M.I. Burguete; N. Ramirez; J.A. Mayoral; C. Cativiela; A.J. Royo

Publisher: Elsevier Science
Year: 1992
Weight: 791 KB
Volume: 18
Category: Article
ISSN: 0923-1137
DOI: 10.1016/0923-1137(92)90654-k

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Several ahunini~ and titanium derivatives are supported on silica and alumina. Some of the solids obtained contain strong Lewis adds sites and are eft%ient catalysts in Diels-Alder reactions of carbonyl-containing dienophiles. In cyclopentadiene reactions, high conversions and endo/exo selectivities

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The Diels-Alder reaction is one of the most powerful construction processes in organic synthesis, especially for the formation of molecules containing quaternary carbon stereocenters. [1] For this reason there has been much research on the development of enantioselective versions using chiral Lewis