Heterogeneous selective hydrogenation of trans-4-phenyl-3-butene-2-one to allylic alcohol over modified Ir/SiO2 catalyst

The heterogeneous selective hydrogenation of trans-4-phenyl-3-butene-2-one to allylic alcohol, catalyzed by Ir/SiO2 stabilized with phosphines and modified by cinchona alkaloids, was described herein. Under the optimized conditions, the chemoselectivity to α,β-unsaturated alcohol was more than 99% with enantioselectivity up to 46%.

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► Heterogeneous enantioselective hydrogenation of trans-4-phenyl-3-butene-2-one is reported.
► Ir/SiO2 stabilized with phosphines and modified by cinchona alkaloids are employed as catalysts.
► Chemoselectivity to α,β-unsaturated alcohol is more than 99%.
► Enantioselectivity to α,β-unsaturated alcohol is up to 46%.