Volume 55, Issue 43 pp. 13602-13605
Communication

Merging Iron Catalysis and Biocatalysis—Iron Carbonyl Complexes as Efficient Hydrogen Autotransfer Catalysts in Dynamic Kinetic Resolutions

Dr. Osama El-Sepelgy

Dr. Osama El-Sepelgy

Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany

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Nurtalya Alandini

Nurtalya Alandini

Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany

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Prof. Dr. Magnus Rueping

Corresponding Author

Prof. Dr. Magnus Rueping

Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany

King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal, 23955-6900 Saudi Arabia

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First published: 29 September 2016
Citations: 79

Graphical Abstract

Iron can: Green and inexpensive iron carbonyl complexes are efficient catalysts for the racemization of chiral alcohols by mimicking the action of Fe-hydrogenases. The combination of the iron-based catalyst with lipase provides a platform for the enzymatic resolution of secondary alcohols. TMS=trimethylsilyl.

Abstract

A dual catalytic iron/lipase system has been developed and applied in the dynamic kinetic resolution of benzylic and aliphatic secondary alcohols. A detailed study of the Knölker-type iron complexes demonstrated the hydrogen autotransfer of alcohols to proceed under mild reaction conditions and allowed the combination with the enzymatic resolution. Different racemic alcohols were efficiently converted to chiral acetates in good yields and with excellent enantioselectivities.

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