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Källström, Klas
Publications (5 of 5) Show all publications
Källström, K. & Andersson, P. (2006). Asymmetric hydrogenation of tri-substituted alkenes with Ir-NHC-thiazole complexes. Tetrahedron Letters, 47(42), 7477-7480
Open this publication in new window or tab >>Asymmetric hydrogenation of tri-substituted alkenes with Ir-NHC-thiazole complexes
2006 (English)In: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 47, no 42, p. 7477-7480Article in journal (Refereed) Published
Abstract [en]

An efficient chiral N-heterocyclic carbene ligand for the Ir-catalyzed asymmetric hydrogenation of largely unfunctionalized tri-substituted olefins has been developed. The Ir-NHC-thiazole catalyst is able to reduce a large variety of substrates with excellent conversions and good enantioselectivities with ee's ranging from 34% to 90%, depending on the geometry around the double bond of the substrates.
National Category
Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-84297 (URN)10.1016/j.tetlet.2006.08.039 (DOI)000241063900018 ()
Available from: 2006-11-14 Created: 2006-11-14 Last updated: 2017-12-14Bibliographically approved
Källström, K., Munslow, I. & Andersson, P. (2006). Ir-Catalysed Asymmetric Hydrogenation: Ligands, Substrates and Mechanism. Chem. Eur. J. (12), 3194-3200
Open this publication in new window or tab >>Ir-Catalysed Asymmetric Hydrogenation: Ligands, Substrates and Mechanism
2006 (English)In: Chem. Eur. J., no 12, p. 3194-3200Article in journal (Refereed) Published
National Category
Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-84301 (URN)doi:10.1002/chem.200500755 (DOI)
Available from: 2006-11-14 Created: 2006-11-14 Last updated: 2011-01-11
Hedberg, C., Källström, K., Arvidsson, P., Brandt, P. & Andersson, P. (2005). Mechanistic Insights into the Phosphine-Free RuCp*-Diamine-Catalyzed Hydrogenation of Aryl Ketones: Experimental and Theoretical Evidence for an Alcohol-Mediated Dihydrogen Activation. J. Am. Chem. Soc. (127), 15083-15090
Open this publication in new window or tab >>Mechanistic Insights into the Phosphine-Free RuCp*-Diamine-Catalyzed Hydrogenation of Aryl Ketones: Experimental and Theoretical Evidence for an Alcohol-Mediated Dihydrogen Activation
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2005 (English)In: J. Am. Chem. Soc., no 127, p. 15083-15090Article in journal (Refereed) Published
Abstract
National Category
Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-84289 (URN)doi:10.1021/ja051920Q (DOI)
Available from: 2006-11-14 Created: 2006-11-14 Last updated: 2016-08-17
Källström, K., Hedberg, C., Brandt, P., Bayer, A. & Andersson, P. G. (2004). Rationally Designed Ligands for Asymmetric Iridium-Catalyzed Hydrogenation of Olefins. Journal of the American Chemical Society, 126(44), 14308-14309
Open this publication in new window or tab >>Rationally Designed Ligands for Asymmetric Iridium-Catalyzed Hydrogenation of Olefins
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2004 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 126, no 44, p. 14308-14309Article in journal (Refereed) Published
Abstract [en]

A new class of chiral N,P-ligands for the Ir-catalyzed asymmetric hydrogenation of aryl alkenes has been developed. These new ligands proved to be highly efficient and tolerates a broad range of substrates. The enantiomeric excesses are in the range of the best ever reported. The results can be rationalized with the proposed selectivity model.
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2004
National Category
Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-92879 (URN)10.1021/ja0464241 (DOI)000224964500003 ()2-s2.0-7744246546 (Scopus ID)
Available from: 2005-04-07 Created: 2005-04-07 Last updated: 2025-04-01Bibliographically approved
Ekegren, J., Roth, P., Källström, K., Tarnai, T. & Andersson, P. (2003). Synthesis and evaluation of N,S-compounds as chiral ligands for transfer hydrogenation of acetophenone. Org. Biomol. Chem (1), 358-366
Open this publication in new window or tab >>Synthesis and evaluation of N,S-compounds as chiral ligands for transfer hydrogenation of acetophenone
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2003 (English)In: Org. Biomol. Chem, no 1, p. 358-366Article in journal (Refereed) Published
National Category
Organic Chemistry
Identifiers
urn:nbn:se:uu:diva-84390 (URN)doi:10.1039/b208907f (DOI)
Available from: 2006-11-15 Created: 2006-11-15 Last updated: 2011-01-13
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