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Synfacts 2020; 16(03): 0327
DOI: 10.1055/s-0039-1691727
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

Silica-Supported Manganese(II) Catalyst for Carbonyl Hydrosilylation, Hydroboration, and Transesterification

Contributor(s):
Yasuhiro Uozumi
,
Shun Ichii
Ghaffari B, Mendes-Burak J, Chan KW, Copéret C. * ETH Zürich, Switzerland
Silica-Supported MnII Sites as Efficient Catalysts for Carbonyl Hydroboration, Hydrosilylation, and Transesterification.

Chem. Eur. J. 2019;
25: 13869-13873
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Further Information

Publication History

Publication Date:
18 February 2020 (online)

 
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Key words

manganese catalysis - silica - hydrosilylation - hydroboration - transesterification

Significance

A silica-supported manganese catalyst (Mn@SiO2–40 0) was prepared by treatment of silica gel with Mn{N(SiMe3)2}2·THF, followed by thermal treatment under reduced pressure (eq. 1). Mn@SiO2–400 catalyzed the hydrosilylation of benzaldehyde (eq. 2), the hydroboration of aldehydes and ketones (eq. 3), and the transesterification of methyl esters with 1-butanol (eq. 4) to give the corresponding products in ≥91% yields.


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Comment

Mn@SiO2–400 was characterized by means of elemental analysis and IR, EPR, and XANES spectroscopy. In the hydroboration reaction, the catalyst was recovered and reused four times without significant loss of its catalytic activity.


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