Citation: Ahmed H. Aboo, Robina Begum, Liangliang Zhao, Zahoor H. Farooqi, Jianliang Xiao. Methanol as hydrogen source: Chemoselective transfer hydrogena-tion of α,β-unsaturated ketones with a rhodacycle[J]. Chinese Journal of Catalysis, ;2019, 40(11): 1795-1799. doi: S1872-2067(19)63367-X shu

Methanol as hydrogen source: Chemoselective transfer hydrogena-tion of α,β-unsaturated ketones with a rhodacycle

a Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom;
b Institute of Chemistry, University of the Punjab, New Campus, Lahore 54590, Pakistan

Received Date: 31 January 2019
Revised Date: 1 April 2019

Fund Project: We thank the Higher Committee for Education Development in Iraq for financial support (AHB) and the Commonwealth Scholarships Commission in the UK for a Split-Site PhD Scholarship (RB).

Methanol is a safe, economic and easy-to-handle hydrogen source. It has rarely been used in transfer hydrogenation reactions, however. We herein report that a cyclometalated rhodium complex, rhodacycle, catalyzes highly chemoselective hydrogenation of α,β-unsaturated ketones with methanol as the hydrogen source. A wide variety of chalcones, styryl methyl ketones and vinyl methyl ketones, including sterically demanding ones, were reduced to the saturated ketones in refluxing methanol in a short reaction time, with no need for inter gas protection, and no reduction of the carbonyl moieties was observed. The catalysis described provides a practically easy and operationally safe method for the reduction of olefinic bonds in α,β-unsaturated ketone compounds.
- α,β-Unsaturated ketones,
- Transfer hydrogenation,
- Methanol,
- Rhodium complex,
- Chemoselectivity
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