Organic Letters · 2005 · 979 citations · 10 references
Natural SciencesChemistryCatalysisOrganic ChemistryAddition ReactionsHeterocycle SynthesisHeterocyclic ChemistryChiral Product SynthesisConjugate AdditionEnantioselective Synthesis
Cinchona alkaloid-derived chiral bifunctional thiourea organocatalysts were synthesized and applied in the Michael addition between nitromethane and chalcones with high ee and chemical yields.
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Asymmetric Organic Catalysis with Modified Cinchona Alkaloids
Shi‐Kai Tian, Yonggang Chen, Jianfeng Hang et al. · Accounts of Chemical Research · 2004 · 618 citations
Henk Hiemstra, Hans Wynberg · Journal of the American Chemical Society · 1981 · 442 citations