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Munoz-Herranz, Maria 
ORCID: https://orcid.org/0000-0001-9037-349X, Adrio, Javier, Carretero, Juan Carlos and Echavarren, Antonio M.
(2005)
Ligand effects in gold- and platinum-catalyzed cyclization of enynes: Chiral gold complexes for enantioselective alkoxycyclization.
Organometallics, 24 (6).
pp. 1293-1300.
Abstract
Phosphine and bidentate N-N ligands inhibit the Alder-ene-type cycloisomerization of enynes catalyzed by Pt(II) and favor the alkoxycyclization process. The enantioselective Pt(II)-catalyzed alkoxycyclization has been studied in the presence of chiral mono- and bidentate phosphines, as well as chiral bidentate N-N ligands. Modest levels of enantioselection (up to 50% ee) have been obtained with Tol-BINAP as ligand. The alkoxycyclizations with a catalyst formed from [Au(L)Cl]/AgX proceed more readily, and up to 94% ee's have been obtained using [(AuCl)2(Tol-BINAP)] ( 47 ) as the precatalyst. The X-ray crystal structures of Au(I) complexes 47 and chloro-(R)-2-(tert-butylsulfenyl)-1-(diphenylphosphino)ferrocene gold(I) ( 39 ) show the AuCl fragments monocoordinated with the P centers of the chiral phosphine ligands.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry |
| UEA Research Groups: | Faculty of Science > Research Groups > Synthetic Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Materials and Catalysis |
| Depositing User: | Rachel Smith |
| Date Deposited: | 14 Feb 2012 16:22 |
| Last Modified: | 01 Mar 2023 14:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/37113 |
| DOI: | 10.1021/om0491645 |
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