Silica-Supported MnII Sites as Efficient Catalysts for Carbonyl Hydroboration, Hydrosilylation, and Transesterification

Behnaz Ghaffari; Jorge Mendes-Burak; Ka Wing Chan; Christophe Copéret

doi:10.1002/chem.201903638

Silica-Supported Mn^II Sites as Efficient Catalysts for Carbonyl Hydroboration, Hydrosilylation, and Transesterification

Chemistry. 2019 Nov 4;25(61):13869-13873. doi: 10.1002/chem.201903638. Epub 2019 Oct 11.

Authors

Behnaz Ghaffari¹, Jorge Mendes-Burak¹, Ka Wing Chan¹, Christophe Copéret¹

Affiliation

¹ Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093, Zürich, Switzerland.

PMID: 31465589
DOI: 10.1002/chem.201903638

Abstract

Manganese, the third most abundant transition-metal element after iron and titanium, has recently been demonstrated to be an effective homogeneous catalyst in numerous reactions. Herein, the preparation of silica-supported Mn^II sites is reported using Surface Organometallic Chemistry (SOMC), combined with tailored thermolytic molecular precursors approach based on Mn₂ [OSi(OtBu)₃ ]₄ and Mn{N(SiMe₃ )₂ }₂ ⋅THF. These supported Mn^II sites, free of organic ligands, efficiently catalyze numerous reactions: hydroboration and hydrosilylation of ketones and aldehydes as well as the transesterification of industrially relevant substrates.

Keywords: heterogeneous catalysis; hydroboration; hydrosilylation; manganese; transesterification.