10.1002/cctc.201900010
ChemCatChem
FULL PAPER
Procedure 1: To a dry flask containing a toluene (1 mL) solution of CoI2
(0.02 mmol, 10 mol%), In (0.08 mmol, 40 mol%), dcpe (0.03 mmol, 15
mol%), α, β-unsaturated ketone (0.2 mmol, 1.0 equiv.) and iPrOH (0.5
mmol, 2.5 equiv.) were sequentially added in the glove box. The mixture
was then stirred at 80 oC for 24 h. At the end of the reaction, the mixture
was cooled to room temperature and quenched with saturated ammonium
chloride solution (5 mL). The combined mixture was extracted with EtOAc
(3 × 10 mL). The organic extracts were collected and dried with Na2SO4
and concentrated after filtering, then purified by column chromatography.
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Procedure 2: To a dry flask containing a toluene (1 mL) solution of CoI2
(0.02 mmol, 10 mol%), In (0.08 mmol, 40 mol%), dcpe (0.03 mmol, 15
mol%), ortho-alkenylbenzaldehydes (0.2 mmol, 1.0 equiv.) and iPrOH (1.0
mmol, 5.0 equiv.) were sequentially added in the glove box. The mixture
was then stirred at 120 oC for 24 h. At the end of the reaction, the mixture
was cooled to room temperature and quenched with saturated ammonium
chloride solution (5 mL). The combined mixture was extracted with EtOAc
(3×10 mL). The organic extracts were collected and dried with Na2SO4 and
concentrated after filtering, then purified by column chromatography.
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Acknowledgements
We are grateful to the National Basic Research Program of China
(973 Program, No. 2015CB251401) and National Natural Science
Foundation of China (Petrochemical Joint Fund U1662133) for
financial supports.
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Keywords: bidentate ligand • chemoselective reduction • cobalt
complex • homogeneous catalysis • transfer hydrogenation
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