Abstract

Yb(NTf2)3 catalyzed Michael reactions of β-ketoesters to α,β-unsaturated carbonyl compounds more efficiently than did Yb(OTf)3 without any additives in pure water, providing Michael adducts in moderate to good yields.

Keywords: Michael addition, Yb(NTf2)3, β-ketoester, α,β-unsaturated ketone, water