Efficient Catalysis of Nazarov Cyclization Using a Cationic Iridium Complex Possessing Adjacent Labile Coordination Sites
- 15 May 2004
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 126 (22), 6864-6865
- https://doi.org/10.1021/ja049643v
Abstract
The dicationic Ir(III) complex [IrMe(CO)(dppe)(DIB)](BARF)2 having adjacent labile sites has been found to be a very effective catalyst for promoting the Nazarov cyclization of aryl vinyl and divinyl ketones. Spectroscopic evidence for a substate−catalyst complex before cyclization is presented. The efficiency of the cyclization is attributed to the electrophilicity of the Ir(III) complex and substrate activation via chelation.Keywords
This publication has 2 references indexed in Scilit:
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- New Cationic Iridium(III) Complexes of Diiodobenzene as Electrophilic Catalysts: Using Chelation and Lability in ConcertJournal of the American Chemical Society, 2001