A highly active manganese precatalyst for the hydrosilylation of ketones and esters

Tufan K. Mukhopadhyay, Marco Flores, Thomas L. Groy, Ryan Trovitch

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The reduction of (Ph2 PPrPDI)MnCl2 allowed the preparation of the formally zerovalent complex, (Ph2 PPrPDI)Mn, which features a pentadentate bis(imino)pyridine chelate. This complex is a highly active precatalyst for the hydrosilylation of ketones, exhibiting TOFs of up to 76,800 h-1 in the absence of solvent. Loadings as low as 0.01 mol % were employed, and (Ph2 PPrPDI)Mn was found to mediate the atom-efficient utilization of Si-H bonds to form quaternary silane products. (Ph2PPrPDI)Mn was also shown to catalyze the dihydrosilylation of esters following cleavage of the substrate acyl C-O bond. Electronic structure investigation of (Ph 2PPrPDI)Mn revealed that this complex possesses an unpaired electron on the metal center, rendering it likely that catalysis takes place following electron transfer to the incoming carbonyl substituent.

Original languageEnglish
Pages (from-to)882-885
Number of pages4
JournalJournal of the American Chemical Society
Volume136
Issue number3
DOIs
Publication statusPublished - Jan 22 2014

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Hydrosilylation
Manganese
Ketones
Esters
Electrons
Silanes
Catalysis
Pyridine
Electronic structure
Metals
Atoms
Substrates
pyridine
manganese chloride

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

A highly active manganese precatalyst for the hydrosilylation of ketones and esters. / Mukhopadhyay, Tufan K.; Flores, Marco; Groy, Thomas L.; Trovitch, Ryan.

In: Journal of the American Chemical Society, Vol. 136, No. 3, 22.01.2014, p. 882-885.

Research output: Contribution to journalArticle

Mukhopadhyay, Tufan K. ; Flores, Marco ; Groy, Thomas L. ; Trovitch, Ryan. / A highly active manganese precatalyst for the hydrosilylation of ketones and esters. In: Journal of the American Chemical Society. 2014 ; Vol. 136, No. 3. pp. 882-885.
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N2 - The reduction of (Ph2 PPrPDI)MnCl2 allowed the preparation of the formally zerovalent complex, (Ph2 PPrPDI)Mn, which features a pentadentate bis(imino)pyridine chelate. This complex is a highly active precatalyst for the hydrosilylation of ketones, exhibiting TOFs of up to 76,800 h-1 in the absence of solvent. Loadings as low as 0.01 mol % were employed, and (Ph2 PPrPDI)Mn was found to mediate the atom-efficient utilization of Si-H bonds to form quaternary silane products. (Ph2PPrPDI)Mn was also shown to catalyze the dihydrosilylation of esters following cleavage of the substrate acyl C-O bond. Electronic structure investigation of (Ph 2PPrPDI)Mn revealed that this complex possesses an unpaired electron on the metal center, rendering it likely that catalysis takes place following electron transfer to the incoming carbonyl substituent.

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