Abstract
A novel strategy for the asymmetric Michael addition of aldehydes to nitroolefins with a catalytic system of organocatalyst 1 in combination with ionic-liquid-supported (ILS) benzoic acid in water has been developed. The Michael adducts of this system give excellent diastereo- and enantioselectivities. A notable feature of this organocatalytic system is that the catalyst can be recycled more than 12 times without significant loss of enantioselectivity. In addition, the synthetic methodology presented is simple, practical, and environmentally benign.
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