Abstract
Bifunctional chiral organocatalysts comprising thiourea and tertiary amine groups were synthesized. They act as efficient catalysts for asymmetric Michael addition of arylthiols to α,β-unsaturated carbonyl compounds. Enantioselectivity up to 85% has been achieved. Asymmetric α-protonation reaction (up to 60% ee) can be obtained in the presence of the bifunctional catalyst.
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