Ytterbium triflate catalyzed Michael additions of β-ketoesters in water
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Highly efficient ytterbium triflate catalyzed Michael additions of α-nitroesters in water
Michael additions of α-nitroesters with enones and α,β-unsaturated aldehydes result in quantitative conversions to the corresponding 1,4-adducts by performing the reactions in water in the presence of ytterbium triflate as water-tolerant Lewis acid.
