Thomas Pullmann

RWTH Aachen University

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Walter Leitner

RWTH Aachen University

Giancarlo Franciò

Universidade de Caxias do Sul

Alan M. Dyke

Johnson Matthey (United Kingdom)

Antonio Zanotti‐Gerosa

Johnson Matthey (United Kingdom)

B. Engendahl

DSM (Netherlands)

Ziyun Zhang

Shanghai Institute of Technology

Herbert Plenio

Technical University of Darmstadt

Markus Hölscher

RWTH Aachen University

M. Hölscher

Industrial Union of Metalworkers

Axel Köllhofer

Technical University of Darmstadt

Cooperative Institutions

RWTH Aachen University

FH Aachen

Technical University of Darmstadt

Johnson Matthey (United Kingdom)

Max-Planck-Institut für Kohlenforschung

University of Bristol

International Union of Railways

Johnson Matthey (United States)

Johnson Matthey (Germany)

University of Liverpool

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A Versatile Catalyst for the Sonogashira Coupling of Aryl Chlorides.

ChemInform (2003)

Axel Koellhofer Thomas Pullmann Herbert Plenio

For Abstract see ChemInform Abstract in Full Text.

Sonogashira coupling

10.1002/chin.200326064

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New Quinaphos Ligands for Asymmetric Hydrogenation

Synfacts (2010)

Giancarlo Franciò Walter Leitner Thomas Pullmann B. Engendahl Zhan Zhang

New members of the Quinaphos-type ligands have been synthesized by a simple protocol and fully characterized. These new Quinaphos ligands with a more flexible 1,2,3,4-tetrahydroquinoline backbone were shown to be extremely effective for asymmetric hydrogenation of functionalized olefins, dehydroamino acid derivatives as well as enamides.

Asymmetric hydrogenation

10.1055/s-0030-1258692

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Continuous Enantioselective Hydrogenation with a Molecular Catalyst in Supported Ionic Liquid Phase under Supercritical CO₂ Flow

ChemCatChem (2010)

Ulrich Hintermair Tobias Höfener Thomas Pullmann Giancarlo Franciò Walter Leitner

Highly efficient continuous-flow asymmetric catalysis was achieved by combination of supported ionic liquid phase (SILP) catalysts with supercritical CO2 (scCO2) as the mobile phase, as demonstrated for enantioselective hydrogenation in the presence of a molecular rhodium–QUINAPHOS complex. The integrated reaction and separation process yielded chemically and enantiomerically pure products without the need for organic solvents. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

10.1002/cctc.200900261

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Citations (101)

A Versatile Catalyst for the Sonogashira Coupling of Aryl Chlorides

Angewandte Chemie International Edition (2003)

Axel Köllhofer Thomas Pullmann Herbert Plenio

Aryl chlorides are suitable substrates for the Sonogashira coupling! By using the versatile catalyst system Na2[PdCl4]/PR3/CuI (PR3=(1-Ad)2PBn, PtBu3), the Sonogashira coupling [Eq. (a)] of aryl chlorides with alkynes generates excellent yields of the corresponding disubstituted aryl alkynes.

Sonogashira coupling

10.1002/anie.200390273

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Quinaphos and Dihydro‐Quinaphos Phosphine–Phosphoramidite Ligands for Asymmetric Hydrogenation

Chemistry - A European Journal (2010)

Thomas Pullmann B. Engendahl Ziyun Zhang Markus Hölscher Antonio Zanotti‐Gerosa

New derivatives of the Quinaphos ligands and the related Dihydro-Quinaphos ligands based on the more flexible 1,2,3,4-tetrahydroquinoline backbone have been prepared and fully characterised. A general and straightforward separation protocol was devised, which allowed for the gram-scale isolation of the R(a),S(c) and S(a),R(c) diastereomers. These new phosphine-phosphoramidite ligands have been applied in the Rh-catalysed asymmetric hydrogenation of functionalised olefins with the achievement of excellent enantioselectivities (> or = 99%) in most cases and turnover frequency (TOF) values of up to > or = 20,000 h(-1). These results substantiate the practical utility of readily accessible Quinaphos-type ligands, which belong to the most active and selective category of ligands for Rh-catalysed hydrogenation known to date.

Phosphoramidite

Asymmetric hydrogenation

Diastereomer

10.1002/chem.201000063

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Citations (55)

CCDC 749795: Experimental Crystal Structure Determination

The Cambridge Structural Database (2010)

Thomas Pullmann B. Engendahl Ziyun Zhang M. Hölscher Antonio Zanotti‐Gerosa

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cct56y3

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Synthese neuer QUINAPHOS-Derivate und deren Einsatz in der asymmetrischen Katalyse

Thomas Pullmann Walter Leitner

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Ein leistungsfähiger Katalysator für die Sonogashira‐Kupplung von Chloraromaten

Angewandte Chemie (2003)

Axel Köllhofer Thomas Pullmann Herbert Plenio

Jetzt auch Arylchloride! Mit dem leistungsfähigen Katalysatorsystem Na2[PdCl4]/PR3/CuI (PR3=(1-Ad)2PBn, PtBu3) gelingt die Sonogashira-Kupplung [Gl. (a)] von Chloraromaten mit Alkinen zu den entsprechenden disubstituierten Arylalkinen in ausgezeichneten Ausbeuten.

10.1002/ange.200390248

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Citations (65)

CCDC 749794: Experimental Crystal Structure Determination

The Cambridge Structural Database (2010)

Thomas Pullmann B. Engendahl Ziyun Zhang M. Hölscher Antonio Zanotti‐Gerosa

10.5517/cct56x2

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