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Lanthanide iodides, a new family of efficient Lewis acid catalysts

✍ Scribed by Jacqueline Collin; Nicolas Giuseppone; Pierre Van de Weghe

Book ID: 104111792
Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 360 KB
Volume: 178-180
Category: Article
ISSN: 0010-8545
DOI: 10.1016/s0010-8545(98)00086-1

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✦ Synopsis

Samarium diiodide and other lanthanide iodides are very efficient Lewis acid catalysts for numerous reactions such as Mukaiyama aldol and Michael reactions, preparation of enoxysilanes, cycloaddition reactions and ring opening of oxiranes by silylated nucleophiles or amines. Activities and selectivities of catalysts vary with the nature of the metal and the ligands for some reactions. Lanthanide iodides coordinated by a cyclopentadienyl ligand with an asymmetric center and an ether function on a pendant chain have been characterized and tested for catalysis: low enantioselectivities are observed for complexes with intramolecular coordination.

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