Journal
TETRAHEDRON LETTERS
Volume 41, Issue 25, Pages 4923-4927Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(00)00687-0
Keywords
lanthanides; epoxides; sulfides; selenium and compounds; tellurium and compounds
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Convenient conditions are reported for the preparation of ytterbium(III) chalcogenolate complexes by insertion of ytterbium metal into the chalcogen-chalcogen bond of disulfides, diselenides, and ditellurides. The resulting complexes have been found to transfer arylsulfanyl, -selenanyl, and -telluranyl groups to epoxides in a facile ring-opening reaction. The ytterbium(III) chalcogenolate complexes appear to perform a dual role in both activating the epoxide, due to their Lewis acidic nature, and supplying a nucleophile to the coordinated substrate. (C) 2000 Elsevier Science Ltd. All rights reserved.
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