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Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK
E-mail: peter.scott@warwick.ac.uk
; Fax: (+44) 024 7657 2710
; Tel: (+44) 024 7652 3238
Chem. Commun., 2008, 1422-1424
DOI:
10.1039/B718373A
Received
28 Nov 2007,
Accepted
24 Jan 2008
First published online
15 Feb 2008
Chiral-at-metal half-sandwich diamide complexes catalyse enantioselective cyclohydroamination of aminoalkenes at unexpectedly high rates given their high coordination number and steric bulk; substantial evidence is presented which argues against the established σ-bond insertion process and is strongly indicative of an imido [2+2] cycloaddition mechanism.