Highly anti-selective and enantioselective nitro-Mannich reactions have been achieved for a broad spectrum of substrates catalyzed by chiral bifunctional multiple hydrogen-bonding-donor amine-thioureas. Multiple hydrogen-bonding donors play a significant role in accelerating reactions and improving yields, diastereoselectivities, and enantioselectivities.
Chiral amine-thioureas bearing multiple hydrogen bonding donors: highly efficient organocatalysts for asymmetric Michael addition of acetylacetone to nitroolefins
New bifunctional organocatalysts amine-thioureas bearing multiple hydrogen bonding donors were synthesized and applied in catalytic asymmetricMichaeladdition of acetylacetone to aryl and alkyl nitroolefins. Multiple hydrogen bonding donors play a significant role in accelerating reactions, improving yields and enantioselectivities.