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Constraining asymmetric organometallic catalysts within mesoporous supports boosts their enantioselectivity

Constraining asymmetric organometallic catalysts within mesoporous supports boosts their enantioselectivity
Constraining asymmetric organometallic catalysts within mesoporous supports boosts their enantioselectivity
By constraining tethered asymmetric organometallic catalysts within the nanopores of silica supports so as to increase the interaction between the pore wall and the active center (and hence to restrict access of the reactant to the catalyst) a significant improvement in enantioselectivity is achieved. A schematic illustration of a cationic chiral, organometallic catalyst, [Rh(I)(COD)PMP] {(S)-(+)-1-(2-pyrrolidinylmethyl)-pyrrolidine and cyclooctadiene}, which is non-covalently anchored, via a N–H••••F hydrogen bond with the triflate ion, CF3SO3-, to the curved inner surface of a 38 Å diameter pore of a silica support, for the asymmetric hydrogenation of the C=O bond in methyl benzoylformate to the corresponding methyl mandelate is shown. Rh (purple); N (blue); H (white); F (green); C (grey); S (yellow); O (red).
0002-7863
14982-14983
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Jones, Matthew D.
7fc828a3-a068-4b7f-ac05-86ad47843cff
Johnson, Brian F.G.
4912806f-8ff8-4315-aa16-7701bf48a34a
Vaughan, David E.W.
c7ff674e-111b-4721-b286-3c501d3c71c0
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Jones, Matthew D.
7fc828a3-a068-4b7f-ac05-86ad47843cff
Johnson, Brian F.G.
4912806f-8ff8-4315-aa16-7701bf48a34a
Vaughan, David E.W.
c7ff674e-111b-4721-b286-3c501d3c71c0

Raja, Robert, Thomas, John Meurig, Jones, Matthew D., Johnson, Brian F.G. and Vaughan, David E.W. (2003) Constraining asymmetric organometallic catalysts within mesoporous supports boosts their enantioselectivity. Journal of the American Chemical Society, 125 (49), 14982-14983. (doi:10.1021/ja030381r).

Record type: Article

Abstract

By constraining tethered asymmetric organometallic catalysts within the nanopores of silica supports so as to increase the interaction between the pore wall and the active center (and hence to restrict access of the reactant to the catalyst) a significant improvement in enantioselectivity is achieved. A schematic illustration of a cationic chiral, organometallic catalyst, [Rh(I)(COD)PMP] {(S)-(+)-1-(2-pyrrolidinylmethyl)-pyrrolidine and cyclooctadiene}, which is non-covalently anchored, via a N–H••••F hydrogen bond with the triflate ion, CF3SO3-, to the curved inner surface of a 38 Å diameter pore of a silica support, for the asymmetric hydrogenation of the C=O bond in methyl benzoylformate to the corresponding methyl mandelate is shown. Rh (purple); N (blue); H (white); F (green); C (grey); S (yellow); O (red).

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Published date: 14 November 2003

Identifiers

Local EPrints ID: 44172
URI: http://eprints.soton.ac.uk/id/eprint/44172
ISSN: 0002-7863
PURE UUID: f4275701-d522-4cce-8a90-34df38bcc423
ORCID for Robert Raja: ORCID iD orcid.org/0000-0002-4161-7053

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Date deposited: 19 Feb 2007
Last modified: 16 Mar 2024 03:51

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Contributors

Author: Robert Raja ORCID iD
Author: John Meurig Thomas
Author: Matthew D. Jones
Author: Brian F.G. Johnson
Author: David E.W. Vaughan

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