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Title: | Rhodium-Catalyzed Pauson−Khand Reaction Using a Small-Bite-Angle P‑Stereogenic C1‑Diphosphine Ligand |
Author: | Cristóbal Lecina, Edgar Costantino, Andrea R. Grabulosa, Arnald Riera i Escalé, Antoni Verdaguer i Espaulella, Xavier |
Keywords: | Lligands Catàlisi asimètrica Rodi Reacció de Pauson-Khand Ligands Enantioselective catalysis Rhodium Pauson-Khand reaction |
Issue Date: | 30-Sep-2015 |
Publisher: | American Chemical Society |
Abstract: | The asymmetric Pauson−Khand reaction catalyzed by [Rh(COD)(MaxPHOS)]BF4 is described. Several 1,6-enynes have been chosen as model substrates affording moderate yields and selectivities of up to 86% ee. Besides binap-type ligands, we have demonstrated that the Pstereogenic C1-symmetry small-bite-angle ligand MaxPHOS is a viable ligand in this process. The formation of [2+2+2] cycloaddition compounds has shown to be a competitive process. A mechanism is proposed to account for the observed results. The intermediate rhodium dicarbonyl complex 6 was synthesized, and its solid-state structure was elucidated by X-ray crystallography. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1021/acs.organomet.5b00576 |
It is part of: | Organometallics, 2015, vol. 34, num. 20, p. 4989-4993 |
URI: | http://hdl.handle.net/2445/69303 |
Related resource: | http://dx.doi.org/10.1021/acs.organomet.5b00576 |
ISSN: | 0276-7333 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) Articles publicats en revistes (Institut de Recerca Biomèdica (IRB Barcelona)) |
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